1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* auditsc.c -- System-call auditing support 1 /* auditsc.c -- System-call auditing support
3 * Handles all system-call specific auditing f 2 * Handles all system-call specific auditing features.
4 * 3 *
5 * Copyright 2003-2004 Red Hat Inc., Durham, N 4 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
6 * Copyright 2005 Hewlett-Packard Development 5 * Copyright 2005 Hewlett-Packard Development Company, L.P.
7 * Copyright (C) 2005, 2006 IBM Corporation 6 * Copyright (C) 2005, 2006 IBM Corporation
8 * All Rights Reserved. 7 * All Rights Reserved.
9 * 8 *
>> 9 * This program is free software; you can redistribute it and/or modify
>> 10 * it under the terms of the GNU General Public License as published by
>> 11 * the Free Software Foundation; either version 2 of the License, or
>> 12 * (at your option) any later version.
>> 13 *
>> 14 * This program is distributed in the hope that it will be useful,
>> 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> 17 * GNU General Public License for more details.
>> 18 *
>> 19 * You should have received a copy of the GNU General Public License
>> 20 * along with this program; if not, write to the Free Software
>> 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
>> 22 *
10 * Written by Rickard E. (Rik) Faith <faith@re 23 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
11 * 24 *
12 * Many of the ideas implemented here are from 25 * Many of the ideas implemented here are from Stephen C. Tweedie,
13 * especially the idea of avoiding a copy by u 26 * especially the idea of avoiding a copy by using getname.
14 * 27 *
15 * The method for actual interception of sysca 28 * The method for actual interception of syscall entry and exit (not in
16 * this file -- see entry.S) is based on a GPL 29 * this file -- see entry.S) is based on a GPL'd patch written by
17 * okir@suse.de and Copyright 2003 SuSE Linux 30 * okir@suse.de and Copyright 2003 SuSE Linux AG.
18 * 31 *
19 * POSIX message queue support added by George 32 * POSIX message queue support added by George Wilson <ltcgcw@us.ibm.com>,
20 * 2006. 33 * 2006.
21 * 34 *
22 * The support of additional filter rules comp 35 * The support of additional filter rules compares (>, <, >=, <=) was
23 * added by Dustin Kirkland <dustin.kirkland@u 36 * added by Dustin Kirkland <dustin.kirkland@us.ibm.com>, 2005.
24 * 37 *
25 * Modified by Amy Griffis <amy.griffis@hp.com 38 * Modified by Amy Griffis <amy.griffis@hp.com> to collect additional
26 * filesystem information. 39 * filesystem information.
27 * 40 *
28 * Subject and object context labeling support 41 * Subject and object context labeling support added by <danjones@us.ibm.com>
29 * and <dustin.kirkland@us.ibm.com> for LSPP c 42 * and <dustin.kirkland@us.ibm.com> for LSPP certification compliance.
30 */ 43 */
31 44
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 45 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 46
34 #include <linux/init.h> 47 #include <linux/init.h>
35 #include <asm/types.h> 48 #include <asm/types.h>
36 #include <linux/atomic.h> 49 #include <linux/atomic.h>
37 #include <linux/fs.h> 50 #include <linux/fs.h>
38 #include <linux/namei.h> 51 #include <linux/namei.h>
39 #include <linux/mm.h> 52 #include <linux/mm.h>
40 #include <linux/export.h> 53 #include <linux/export.h>
41 #include <linux/slab.h> 54 #include <linux/slab.h>
42 #include <linux/mount.h> 55 #include <linux/mount.h>
43 #include <linux/socket.h> 56 #include <linux/socket.h>
44 #include <linux/mqueue.h> 57 #include <linux/mqueue.h>
45 #include <linux/audit.h> 58 #include <linux/audit.h>
46 #include <linux/personality.h> 59 #include <linux/personality.h>
47 #include <linux/time.h> 60 #include <linux/time.h>
48 #include <linux/netlink.h> 61 #include <linux/netlink.h>
49 #include <linux/compiler.h> 62 #include <linux/compiler.h>
50 #include <asm/unistd.h> 63 #include <asm/unistd.h>
51 #include <linux/security.h> 64 #include <linux/security.h>
52 #include <linux/list.h> 65 #include <linux/list.h>
53 #include <linux/binfmts.h> 66 #include <linux/binfmts.h>
54 #include <linux/highmem.h> 67 #include <linux/highmem.h>
55 #include <linux/syscalls.h> 68 #include <linux/syscalls.h>
56 #include <asm/syscall.h> 69 #include <asm/syscall.h>
57 #include <linux/capability.h> 70 #include <linux/capability.h>
58 #include <linux/fs_struct.h> 71 #include <linux/fs_struct.h>
59 #include <linux/compat.h> 72 #include <linux/compat.h>
60 #include <linux/ctype.h> 73 #include <linux/ctype.h>
61 #include <linux/string.h> 74 #include <linux/string.h>
62 #include <linux/uaccess.h> 75 #include <linux/uaccess.h>
63 #include <linux/fsnotify_backend.h> 76 #include <linux/fsnotify_backend.h>
64 #include <uapi/linux/limits.h> 77 #include <uapi/linux/limits.h>
65 #include <uapi/linux/netfilter/nf_tables.h> <<
66 #include <uapi/linux/openat2.h> // struct open <<
67 #include <uapi/linux/fanotify.h> <<
68 78
69 #include "audit.h" 79 #include "audit.h"
70 80
71 /* flags stating the success for a syscall */ 81 /* flags stating the success for a syscall */
72 #define AUDITSC_INVALID 0 82 #define AUDITSC_INVALID 0
73 #define AUDITSC_SUCCESS 1 83 #define AUDITSC_SUCCESS 1
74 #define AUDITSC_FAILURE 2 84 #define AUDITSC_FAILURE 2
75 85
76 /* no execve audit message should be longer th 86 /* no execve audit message should be longer than this (userspace limits),
77 * see the note near the top of audit_log_exec 87 * see the note near the top of audit_log_execve_info() about this value */
78 #define MAX_EXECVE_AUDIT_LEN 7500 88 #define MAX_EXECVE_AUDIT_LEN 7500
79 89
80 /* max length to print of cmdline/proctitle va 90 /* max length to print of cmdline/proctitle value during audit */
81 #define MAX_PROCTITLE_AUDIT_LEN 128 91 #define MAX_PROCTITLE_AUDIT_LEN 128
82 92
83 /* number of audit rules */ 93 /* number of audit rules */
84 int audit_n_rules; 94 int audit_n_rules;
85 95
86 /* determines whether we collect data for sign 96 /* determines whether we collect data for signals sent */
87 int audit_signals; 97 int audit_signals;
88 98
89 struct audit_aux_data { 99 struct audit_aux_data {
90 struct audit_aux_data *next; 100 struct audit_aux_data *next;
91 int type; 101 int type;
92 }; 102 };
93 103
>> 104 #define AUDIT_AUX_IPCPERM 0
>> 105
94 /* Number of target pids per aux struct. */ 106 /* Number of target pids per aux struct. */
95 #define AUDIT_AUX_PIDS 16 107 #define AUDIT_AUX_PIDS 16
96 108
97 struct audit_aux_data_pids { 109 struct audit_aux_data_pids {
98 struct audit_aux_data d; 110 struct audit_aux_data d;
99 pid_t target_pid[AUD 111 pid_t target_pid[AUDIT_AUX_PIDS];
100 kuid_t target_auid[AU 112 kuid_t target_auid[AUDIT_AUX_PIDS];
101 kuid_t target_uid[AUD 113 kuid_t target_uid[AUDIT_AUX_PIDS];
102 unsigned int target_session 114 unsigned int target_sessionid[AUDIT_AUX_PIDS];
103 u32 target_sid[AUD 115 u32 target_sid[AUDIT_AUX_PIDS];
104 char target_comm[AU 116 char target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
105 int pid_count; 117 int pid_count;
106 }; 118 };
107 119
108 struct audit_aux_data_bprm_fcaps { 120 struct audit_aux_data_bprm_fcaps {
109 struct audit_aux_data d; 121 struct audit_aux_data d;
110 struct audit_cap_data fcap; 122 struct audit_cap_data fcap;
111 unsigned int fcap_ver; 123 unsigned int fcap_ver;
112 struct audit_cap_data old_pcap; 124 struct audit_cap_data old_pcap;
113 struct audit_cap_data new_pcap; 125 struct audit_cap_data new_pcap;
114 }; 126 };
115 127
116 struct audit_tree_refs { 128 struct audit_tree_refs {
117 struct audit_tree_refs *next; 129 struct audit_tree_refs *next;
118 struct audit_chunk *c[31]; 130 struct audit_chunk *c[31];
119 }; 131 };
120 132
121 struct audit_nfcfgop_tab { <<
122 enum audit_nfcfgop op; <<
123 const char *s; <<
124 }; <<
125 <<
126 static const struct audit_nfcfgop_tab audit_nf <<
127 { AUDIT_XT_OP_REGISTER, <<
128 { AUDIT_XT_OP_REPLACE, <<
129 { AUDIT_XT_OP_UNREGISTER, <<
130 { AUDIT_NFT_OP_TABLE_REGISTER, <<
131 { AUDIT_NFT_OP_TABLE_UNREGISTER, <<
132 { AUDIT_NFT_OP_CHAIN_REGISTER, <<
133 { AUDIT_NFT_OP_CHAIN_UNREGISTER, <<
134 { AUDIT_NFT_OP_RULE_REGISTER, <<
135 { AUDIT_NFT_OP_RULE_UNREGISTER, <<
136 { AUDIT_NFT_OP_SET_REGISTER, <<
137 { AUDIT_NFT_OP_SET_UNREGISTER, <<
138 { AUDIT_NFT_OP_SETELEM_REGISTER, <<
139 { AUDIT_NFT_OP_SETELEM_UNREGISTER, <<
140 { AUDIT_NFT_OP_GEN_REGISTER, <<
141 { AUDIT_NFT_OP_OBJ_REGISTER, <<
142 { AUDIT_NFT_OP_OBJ_UNREGISTER, <<
143 { AUDIT_NFT_OP_OBJ_RESET, <<
144 { AUDIT_NFT_OP_FLOWTABLE_REGISTER, <<
145 { AUDIT_NFT_OP_FLOWTABLE_UNREGISTER, <<
146 { AUDIT_NFT_OP_SETELEM_RESET, <<
147 { AUDIT_NFT_OP_RULE_RESET, <<
148 { AUDIT_NFT_OP_INVALID, <<
149 }; <<
150 <<
151 static int audit_match_perm(struct audit_conte 133 static int audit_match_perm(struct audit_context *ctx, int mask)
152 { 134 {
153 unsigned n; 135 unsigned n;
154 <<
155 if (unlikely(!ctx)) 136 if (unlikely(!ctx))
156 return 0; 137 return 0;
157 n = ctx->major; 138 n = ctx->major;
158 139
159 switch (audit_classify_syscall(ctx->ar 140 switch (audit_classify_syscall(ctx->arch, n)) {
160 case AUDITSC_NATIVE: !! 141 case 0: /* native */
161 if ((mask & AUDIT_PERM_WRITE) 142 if ((mask & AUDIT_PERM_WRITE) &&
162 audit_match_class(AUDIT_C 143 audit_match_class(AUDIT_CLASS_WRITE, n))
163 return 1; 144 return 1;
164 if ((mask & AUDIT_PERM_READ) & 145 if ((mask & AUDIT_PERM_READ) &&
165 audit_match_class(AUDIT_C 146 audit_match_class(AUDIT_CLASS_READ, n))
166 return 1; 147 return 1;
167 if ((mask & AUDIT_PERM_ATTR) & 148 if ((mask & AUDIT_PERM_ATTR) &&
168 audit_match_class(AUDIT_C 149 audit_match_class(AUDIT_CLASS_CHATTR, n))
169 return 1; 150 return 1;
170 return 0; 151 return 0;
171 case AUDITSC_COMPAT: /* 32bit on biarc !! 152 case 1: /* 32bit on biarch */
172 if ((mask & AUDIT_PERM_WRITE) 153 if ((mask & AUDIT_PERM_WRITE) &&
173 audit_match_class(AUDIT_C 154 audit_match_class(AUDIT_CLASS_WRITE_32, n))
174 return 1; 155 return 1;
175 if ((mask & AUDIT_PERM_READ) & 156 if ((mask & AUDIT_PERM_READ) &&
176 audit_match_class(AUDIT_C 157 audit_match_class(AUDIT_CLASS_READ_32, n))
177 return 1; 158 return 1;
178 if ((mask & AUDIT_PERM_ATTR) & 159 if ((mask & AUDIT_PERM_ATTR) &&
179 audit_match_class(AUDIT_C 160 audit_match_class(AUDIT_CLASS_CHATTR_32, n))
180 return 1; 161 return 1;
181 return 0; 162 return 0;
182 case AUDITSC_OPEN: !! 163 case 2: /* open */
183 return mask & ACC_MODE(ctx->ar 164 return mask & ACC_MODE(ctx->argv[1]);
184 case AUDITSC_OPENAT: !! 165 case 3: /* openat */
185 return mask & ACC_MODE(ctx->ar 166 return mask & ACC_MODE(ctx->argv[2]);
186 case AUDITSC_SOCKETCALL: !! 167 case 4: /* socketcall */
187 return ((mask & AUDIT_PERM_WRI 168 return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
188 case AUDITSC_EXECVE: !! 169 case 5: /* execve */
189 return mask & AUDIT_PERM_EXEC; 170 return mask & AUDIT_PERM_EXEC;
190 case AUDITSC_OPENAT2: <<
191 return mask & ACC_MODE((u32)ct <<
192 default: 171 default:
193 return 0; 172 return 0;
194 } 173 }
195 } 174 }
196 175
197 static int audit_match_filetype(struct audit_c 176 static int audit_match_filetype(struct audit_context *ctx, int val)
198 { 177 {
199 struct audit_names *n; 178 struct audit_names *n;
200 umode_t mode = (umode_t)val; 179 umode_t mode = (umode_t)val;
201 180
202 if (unlikely(!ctx)) 181 if (unlikely(!ctx))
203 return 0; 182 return 0;
204 183
205 list_for_each_entry(n, &ctx->names_lis 184 list_for_each_entry(n, &ctx->names_list, list) {
206 if ((n->ino != AUDIT_INO_UNSET 185 if ((n->ino != AUDIT_INO_UNSET) &&
207 ((n->mode & S_IFMT) == mod 186 ((n->mode & S_IFMT) == mode))
208 return 1; 187 return 1;
209 } 188 }
210 189
211 return 0; 190 return 0;
212 } 191 }
213 192
214 /* 193 /*
215 * We keep a linked list of fixed-sized (31 po 194 * We keep a linked list of fixed-sized (31 pointer) arrays of audit_chunk *;
216 * ->first_trees points to its beginning, ->tr 195 * ->first_trees points to its beginning, ->trees - to the current end of data.
217 * ->tree_count is the number of free entries 196 * ->tree_count is the number of free entries in array pointed to by ->trees.
218 * Original condition is (NULL, NULL, 0); as s 197 * Original condition is (NULL, NULL, 0); as soon as it grows we never revert to NULL,
219 * "empty" becomes (p, p, 31) afterwards. We 198 * "empty" becomes (p, p, 31) afterwards. We don't shrink the list (and seriously,
220 * it's going to remain 1-element for almost a 199 * it's going to remain 1-element for almost any setup) until we free context itself.
221 * References in it _are_ dropped - at the sam 200 * References in it _are_ dropped - at the same time we free/drop aux stuff.
222 */ 201 */
223 202
>> 203 #ifdef CONFIG_AUDIT_TREE
224 static void audit_set_auditable(struct audit_c 204 static void audit_set_auditable(struct audit_context *ctx)
225 { 205 {
226 if (!ctx->prio) { 206 if (!ctx->prio) {
227 ctx->prio = 1; 207 ctx->prio = 1;
228 ctx->current_state = AUDIT_STA !! 208 ctx->current_state = AUDIT_RECORD_CONTEXT;
229 } 209 }
230 } 210 }
231 211
232 static int put_tree_ref(struct audit_context * 212 static int put_tree_ref(struct audit_context *ctx, struct audit_chunk *chunk)
233 { 213 {
234 struct audit_tree_refs *p = ctx->trees 214 struct audit_tree_refs *p = ctx->trees;
235 int left = ctx->tree_count; 215 int left = ctx->tree_count;
236 <<
237 if (likely(left)) { 216 if (likely(left)) {
238 p->c[--left] = chunk; 217 p->c[--left] = chunk;
239 ctx->tree_count = left; 218 ctx->tree_count = left;
240 return 1; 219 return 1;
241 } 220 }
242 if (!p) 221 if (!p)
243 return 0; 222 return 0;
244 p = p->next; 223 p = p->next;
245 if (p) { 224 if (p) {
246 p->c[30] = chunk; 225 p->c[30] = chunk;
247 ctx->trees = p; 226 ctx->trees = p;
248 ctx->tree_count = 30; 227 ctx->tree_count = 30;
249 return 1; 228 return 1;
250 } 229 }
251 return 0; 230 return 0;
252 } 231 }
253 232
254 static int grow_tree_refs(struct audit_context 233 static int grow_tree_refs(struct audit_context *ctx)
255 { 234 {
256 struct audit_tree_refs *p = ctx->trees 235 struct audit_tree_refs *p = ctx->trees;
257 <<
258 ctx->trees = kzalloc(sizeof(struct aud 236 ctx->trees = kzalloc(sizeof(struct audit_tree_refs), GFP_KERNEL);
259 if (!ctx->trees) { 237 if (!ctx->trees) {
260 ctx->trees = p; 238 ctx->trees = p;
261 return 0; 239 return 0;
262 } 240 }
263 if (p) 241 if (p)
264 p->next = ctx->trees; 242 p->next = ctx->trees;
265 else 243 else
266 ctx->first_trees = ctx->trees; 244 ctx->first_trees = ctx->trees;
267 ctx->tree_count = 31; 245 ctx->tree_count = 31;
268 return 1; 246 return 1;
269 } 247 }
>> 248 #endif
270 249
271 static void unroll_tree_refs(struct audit_cont 250 static void unroll_tree_refs(struct audit_context *ctx,
272 struct audit_tree_refs * 251 struct audit_tree_refs *p, int count)
273 { 252 {
>> 253 #ifdef CONFIG_AUDIT_TREE
274 struct audit_tree_refs *q; 254 struct audit_tree_refs *q;
275 int n; 255 int n;
276 <<
277 if (!p) { 256 if (!p) {
278 /* we started with empty chain 257 /* we started with empty chain */
279 p = ctx->first_trees; 258 p = ctx->first_trees;
280 count = 31; 259 count = 31;
281 /* if the very first allocatio 260 /* if the very first allocation has failed, nothing to do */
282 if (!p) 261 if (!p)
283 return; 262 return;
284 } 263 }
285 n = count; 264 n = count;
286 for (q = p; q != ctx->trees; q = q->ne 265 for (q = p; q != ctx->trees; q = q->next, n = 31) {
287 while (n--) { 266 while (n--) {
288 audit_put_chunk(q->c[n 267 audit_put_chunk(q->c[n]);
289 q->c[n] = NULL; 268 q->c[n] = NULL;
290 } 269 }
291 } 270 }
292 while (n-- > ctx->tree_count) { 271 while (n-- > ctx->tree_count) {
293 audit_put_chunk(q->c[n]); 272 audit_put_chunk(q->c[n]);
294 q->c[n] = NULL; 273 q->c[n] = NULL;
295 } 274 }
296 ctx->trees = p; 275 ctx->trees = p;
297 ctx->tree_count = count; 276 ctx->tree_count = count;
>> 277 #endif
298 } 278 }
299 279
300 static void free_tree_refs(struct audit_contex 280 static void free_tree_refs(struct audit_context *ctx)
301 { 281 {
302 struct audit_tree_refs *p, *q; 282 struct audit_tree_refs *p, *q;
303 <<
304 for (p = ctx->first_trees; p; p = q) { 283 for (p = ctx->first_trees; p; p = q) {
305 q = p->next; 284 q = p->next;
306 kfree(p); 285 kfree(p);
307 } 286 }
308 } 287 }
309 288
310 static int match_tree_refs(struct audit_contex 289 static int match_tree_refs(struct audit_context *ctx, struct audit_tree *tree)
311 { 290 {
>> 291 #ifdef CONFIG_AUDIT_TREE
312 struct audit_tree_refs *p; 292 struct audit_tree_refs *p;
313 int n; 293 int n;
314 <<
315 if (!tree) 294 if (!tree)
316 return 0; 295 return 0;
317 /* full ones */ 296 /* full ones */
318 for (p = ctx->first_trees; p != ctx->t 297 for (p = ctx->first_trees; p != ctx->trees; p = p->next) {
319 for (n = 0; n < 31; n++) 298 for (n = 0; n < 31; n++)
320 if (audit_tree_match(p 299 if (audit_tree_match(p->c[n], tree))
321 return 1; 300 return 1;
322 } 301 }
323 /* partial */ 302 /* partial */
324 if (p) { 303 if (p) {
325 for (n = ctx->tree_count; n < 304 for (n = ctx->tree_count; n < 31; n++)
326 if (audit_tree_match(p 305 if (audit_tree_match(p->c[n], tree))
327 return 1; 306 return 1;
328 } 307 }
>> 308 #endif
329 return 0; 309 return 0;
330 } 310 }
331 311
332 static int audit_compare_uid(kuid_t uid, 312 static int audit_compare_uid(kuid_t uid,
333 struct audit_name 313 struct audit_names *name,
334 struct audit_fiel 314 struct audit_field *f,
335 struct audit_cont 315 struct audit_context *ctx)
336 { 316 {
337 struct audit_names *n; 317 struct audit_names *n;
338 int rc; 318 int rc;
339 !! 319
340 if (name) { 320 if (name) {
341 rc = audit_uid_comparator(uid, 321 rc = audit_uid_comparator(uid, f->op, name->uid);
342 if (rc) 322 if (rc)
343 return rc; 323 return rc;
344 } 324 }
345 !! 325
346 if (ctx) { 326 if (ctx) {
347 list_for_each_entry(n, &ctx->n 327 list_for_each_entry(n, &ctx->names_list, list) {
348 rc = audit_uid_compara 328 rc = audit_uid_comparator(uid, f->op, n->uid);
349 if (rc) 329 if (rc)
350 return rc; 330 return rc;
351 } 331 }
352 } 332 }
353 return 0; 333 return 0;
354 } 334 }
355 335
356 static int audit_compare_gid(kgid_t gid, 336 static int audit_compare_gid(kgid_t gid,
357 struct audit_name 337 struct audit_names *name,
358 struct audit_fiel 338 struct audit_field *f,
359 struct audit_cont 339 struct audit_context *ctx)
360 { 340 {
361 struct audit_names *n; 341 struct audit_names *n;
362 int rc; 342 int rc;
363 !! 343
364 if (name) { 344 if (name) {
365 rc = audit_gid_comparator(gid, 345 rc = audit_gid_comparator(gid, f->op, name->gid);
366 if (rc) 346 if (rc)
367 return rc; 347 return rc;
368 } 348 }
369 !! 349
370 if (ctx) { 350 if (ctx) {
371 list_for_each_entry(n, &ctx->n 351 list_for_each_entry(n, &ctx->names_list, list) {
372 rc = audit_gid_compara 352 rc = audit_gid_comparator(gid, f->op, n->gid);
373 if (rc) 353 if (rc)
374 return rc; 354 return rc;
375 } 355 }
376 } 356 }
377 return 0; 357 return 0;
378 } 358 }
379 359
380 static int audit_field_compare(struct task_str 360 static int audit_field_compare(struct task_struct *tsk,
381 const struct cr 361 const struct cred *cred,
382 struct audit_fi 362 struct audit_field *f,
383 struct audit_co 363 struct audit_context *ctx,
384 struct audit_na 364 struct audit_names *name)
385 { 365 {
386 switch (f->val) { 366 switch (f->val) {
387 /* process to file object comparisons 367 /* process to file object comparisons */
388 case AUDIT_COMPARE_UID_TO_OBJ_UID: 368 case AUDIT_COMPARE_UID_TO_OBJ_UID:
389 return audit_compare_uid(cred- 369 return audit_compare_uid(cred->uid, name, f, ctx);
390 case AUDIT_COMPARE_GID_TO_OBJ_GID: 370 case AUDIT_COMPARE_GID_TO_OBJ_GID:
391 return audit_compare_gid(cred- 371 return audit_compare_gid(cred->gid, name, f, ctx);
392 case AUDIT_COMPARE_EUID_TO_OBJ_UID: 372 case AUDIT_COMPARE_EUID_TO_OBJ_UID:
393 return audit_compare_uid(cred- 373 return audit_compare_uid(cred->euid, name, f, ctx);
394 case AUDIT_COMPARE_EGID_TO_OBJ_GID: 374 case AUDIT_COMPARE_EGID_TO_OBJ_GID:
395 return audit_compare_gid(cred- 375 return audit_compare_gid(cred->egid, name, f, ctx);
396 case AUDIT_COMPARE_AUID_TO_OBJ_UID: 376 case AUDIT_COMPARE_AUID_TO_OBJ_UID:
397 return audit_compare_uid(audit !! 377 return audit_compare_uid(tsk->loginuid, name, f, ctx);
398 case AUDIT_COMPARE_SUID_TO_OBJ_UID: 378 case AUDIT_COMPARE_SUID_TO_OBJ_UID:
399 return audit_compare_uid(cred- 379 return audit_compare_uid(cred->suid, name, f, ctx);
400 case AUDIT_COMPARE_SGID_TO_OBJ_GID: 380 case AUDIT_COMPARE_SGID_TO_OBJ_GID:
401 return audit_compare_gid(cred- 381 return audit_compare_gid(cred->sgid, name, f, ctx);
402 case AUDIT_COMPARE_FSUID_TO_OBJ_UID: 382 case AUDIT_COMPARE_FSUID_TO_OBJ_UID:
403 return audit_compare_uid(cred- 383 return audit_compare_uid(cred->fsuid, name, f, ctx);
404 case AUDIT_COMPARE_FSGID_TO_OBJ_GID: 384 case AUDIT_COMPARE_FSGID_TO_OBJ_GID:
405 return audit_compare_gid(cred- 385 return audit_compare_gid(cred->fsgid, name, f, ctx);
406 /* uid comparisons */ 386 /* uid comparisons */
407 case AUDIT_COMPARE_UID_TO_AUID: 387 case AUDIT_COMPARE_UID_TO_AUID:
408 return audit_uid_comparator(cr !! 388 return audit_uid_comparator(cred->uid, f->op, tsk->loginuid);
409 au <<
410 case AUDIT_COMPARE_UID_TO_EUID: 389 case AUDIT_COMPARE_UID_TO_EUID:
411 return audit_uid_comparator(cr 390 return audit_uid_comparator(cred->uid, f->op, cred->euid);
412 case AUDIT_COMPARE_UID_TO_SUID: 391 case AUDIT_COMPARE_UID_TO_SUID:
413 return audit_uid_comparator(cr 392 return audit_uid_comparator(cred->uid, f->op, cred->suid);
414 case AUDIT_COMPARE_UID_TO_FSUID: 393 case AUDIT_COMPARE_UID_TO_FSUID:
415 return audit_uid_comparator(cr 394 return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
416 /* auid comparisons */ 395 /* auid comparisons */
417 case AUDIT_COMPARE_AUID_TO_EUID: 396 case AUDIT_COMPARE_AUID_TO_EUID:
418 return audit_uid_comparator(au !! 397 return audit_uid_comparator(tsk->loginuid, f->op, cred->euid);
419 cr <<
420 case AUDIT_COMPARE_AUID_TO_SUID: 398 case AUDIT_COMPARE_AUID_TO_SUID:
421 return audit_uid_comparator(au !! 399 return audit_uid_comparator(tsk->loginuid, f->op, cred->suid);
422 cr <<
423 case AUDIT_COMPARE_AUID_TO_FSUID: 400 case AUDIT_COMPARE_AUID_TO_FSUID:
424 return audit_uid_comparator(au !! 401 return audit_uid_comparator(tsk->loginuid, f->op, cred->fsuid);
425 cr <<
426 /* euid comparisons */ 402 /* euid comparisons */
427 case AUDIT_COMPARE_EUID_TO_SUID: 403 case AUDIT_COMPARE_EUID_TO_SUID:
428 return audit_uid_comparator(cr 404 return audit_uid_comparator(cred->euid, f->op, cred->suid);
429 case AUDIT_COMPARE_EUID_TO_FSUID: 405 case AUDIT_COMPARE_EUID_TO_FSUID:
430 return audit_uid_comparator(cr 406 return audit_uid_comparator(cred->euid, f->op, cred->fsuid);
431 /* suid comparisons */ 407 /* suid comparisons */
432 case AUDIT_COMPARE_SUID_TO_FSUID: 408 case AUDIT_COMPARE_SUID_TO_FSUID:
433 return audit_uid_comparator(cr 409 return audit_uid_comparator(cred->suid, f->op, cred->fsuid);
434 /* gid comparisons */ 410 /* gid comparisons */
435 case AUDIT_COMPARE_GID_TO_EGID: 411 case AUDIT_COMPARE_GID_TO_EGID:
436 return audit_gid_comparator(cr 412 return audit_gid_comparator(cred->gid, f->op, cred->egid);
437 case AUDIT_COMPARE_GID_TO_SGID: 413 case AUDIT_COMPARE_GID_TO_SGID:
438 return audit_gid_comparator(cr 414 return audit_gid_comparator(cred->gid, f->op, cred->sgid);
439 case AUDIT_COMPARE_GID_TO_FSGID: 415 case AUDIT_COMPARE_GID_TO_FSGID:
440 return audit_gid_comparator(cr 416 return audit_gid_comparator(cred->gid, f->op, cred->fsgid);
441 /* egid comparisons */ 417 /* egid comparisons */
442 case AUDIT_COMPARE_EGID_TO_SGID: 418 case AUDIT_COMPARE_EGID_TO_SGID:
443 return audit_gid_comparator(cr 419 return audit_gid_comparator(cred->egid, f->op, cred->sgid);
444 case AUDIT_COMPARE_EGID_TO_FSGID: 420 case AUDIT_COMPARE_EGID_TO_FSGID:
445 return audit_gid_comparator(cr 421 return audit_gid_comparator(cred->egid, f->op, cred->fsgid);
446 /* sgid comparison */ 422 /* sgid comparison */
447 case AUDIT_COMPARE_SGID_TO_FSGID: 423 case AUDIT_COMPARE_SGID_TO_FSGID:
448 return audit_gid_comparator(cr 424 return audit_gid_comparator(cred->sgid, f->op, cred->fsgid);
449 default: 425 default:
450 WARN(1, "Missing AUDIT_COMPARE 426 WARN(1, "Missing AUDIT_COMPARE define. Report as a bug\n");
451 return 0; 427 return 0;
452 } 428 }
453 return 0; 429 return 0;
454 } 430 }
455 431
456 /* Determine if any context name data matches 432 /* Determine if any context name data matches a rule's watch data */
457 /* Compare a task_struct with an audit_rule. 433 /* Compare a task_struct with an audit_rule. Return 1 on match, 0
458 * otherwise. 434 * otherwise.
459 * 435 *
460 * If task_creation is true, this is an explic 436 * If task_creation is true, this is an explicit indication that we are
461 * filtering a task rule at task creation time 437 * filtering a task rule at task creation time. This and tsk == current are
462 * the only situations where tsk->cred may be 438 * the only situations where tsk->cred may be accessed without an rcu read lock.
463 */ 439 */
464 static int audit_filter_rules(struct task_stru 440 static int audit_filter_rules(struct task_struct *tsk,
465 struct audit_kru 441 struct audit_krule *rule,
466 struct audit_con 442 struct audit_context *ctx,
467 struct audit_nam 443 struct audit_names *name,
468 enum audit_state 444 enum audit_state *state,
469 bool task_creati 445 bool task_creation)
470 { 446 {
471 const struct cred *cred; 447 const struct cred *cred;
472 int i, need_sid = 1; 448 int i, need_sid = 1;
473 u32 sid; 449 u32 sid;
474 unsigned int sessionid; 450 unsigned int sessionid;
475 451
476 if (ctx && rule->prio <= ctx->prio) <<
477 return 0; <<
478 <<
479 cred = rcu_dereference_check(tsk->cred 452 cred = rcu_dereference_check(tsk->cred, tsk == current || task_creation);
480 453
481 for (i = 0; i < rule->field_count; i++ 454 for (i = 0; i < rule->field_count; i++) {
482 struct audit_field *f = &rule- 455 struct audit_field *f = &rule->fields[i];
483 struct audit_names *n; 456 struct audit_names *n;
484 int result = 0; 457 int result = 0;
485 pid_t pid; 458 pid_t pid;
486 459
487 switch (f->type) { 460 switch (f->type) {
488 case AUDIT_PID: 461 case AUDIT_PID:
489 pid = task_tgid_nr(tsk 462 pid = task_tgid_nr(tsk);
490 result = audit_compara 463 result = audit_comparator(pid, f->op, f->val);
491 break; 464 break;
492 case AUDIT_PPID: 465 case AUDIT_PPID:
493 if (ctx) { 466 if (ctx) {
494 if (!ctx->ppid 467 if (!ctx->ppid)
495 ctx->p 468 ctx->ppid = task_ppid_nr(tsk);
496 result = audit 469 result = audit_comparator(ctx->ppid, f->op, f->val);
497 } 470 }
498 break; 471 break;
499 case AUDIT_EXE: 472 case AUDIT_EXE:
500 result = audit_exe_com 473 result = audit_exe_compare(tsk, rule->exe);
501 if (f->op == Audit_not <<
502 result = !resu <<
503 break; 474 break;
504 case AUDIT_UID: 475 case AUDIT_UID:
505 result = audit_uid_com 476 result = audit_uid_comparator(cred->uid, f->op, f->uid);
506 break; 477 break;
507 case AUDIT_EUID: 478 case AUDIT_EUID:
508 result = audit_uid_com 479 result = audit_uid_comparator(cred->euid, f->op, f->uid);
509 break; 480 break;
510 case AUDIT_SUID: 481 case AUDIT_SUID:
511 result = audit_uid_com 482 result = audit_uid_comparator(cred->suid, f->op, f->uid);
512 break; 483 break;
513 case AUDIT_FSUID: 484 case AUDIT_FSUID:
514 result = audit_uid_com 485 result = audit_uid_comparator(cred->fsuid, f->op, f->uid);
515 break; 486 break;
516 case AUDIT_GID: 487 case AUDIT_GID:
517 result = audit_gid_com 488 result = audit_gid_comparator(cred->gid, f->op, f->gid);
518 if (f->op == Audit_equ 489 if (f->op == Audit_equal) {
519 if (!result) 490 if (!result)
520 result !! 491 result = in_group_p(f->gid);
521 } else if (f->op == Au 492 } else if (f->op == Audit_not_equal) {
522 if (result) 493 if (result)
523 result !! 494 result = !in_group_p(f->gid);
524 } 495 }
525 break; 496 break;
526 case AUDIT_EGID: 497 case AUDIT_EGID:
527 result = audit_gid_com 498 result = audit_gid_comparator(cred->egid, f->op, f->gid);
528 if (f->op == Audit_equ 499 if (f->op == Audit_equal) {
529 if (!result) 500 if (!result)
530 result !! 501 result = in_egroup_p(f->gid);
531 } else if (f->op == Au 502 } else if (f->op == Audit_not_equal) {
532 if (result) 503 if (result)
533 result !! 504 result = !in_egroup_p(f->gid);
534 } 505 }
535 break; 506 break;
536 case AUDIT_SGID: 507 case AUDIT_SGID:
537 result = audit_gid_com 508 result = audit_gid_comparator(cred->sgid, f->op, f->gid);
538 break; 509 break;
539 case AUDIT_FSGID: 510 case AUDIT_FSGID:
540 result = audit_gid_com 511 result = audit_gid_comparator(cred->fsgid, f->op, f->gid);
541 break; 512 break;
542 case AUDIT_SESSIONID: 513 case AUDIT_SESSIONID:
543 sessionid = audit_get_ !! 514 sessionid = audit_get_sessionid(current);
544 result = audit_compara 515 result = audit_comparator(sessionid, f->op, f->val);
545 break; 516 break;
546 case AUDIT_PERS: 517 case AUDIT_PERS:
547 result = audit_compara 518 result = audit_comparator(tsk->personality, f->op, f->val);
548 break; 519 break;
549 case AUDIT_ARCH: 520 case AUDIT_ARCH:
550 if (ctx) 521 if (ctx)
551 result = audit 522 result = audit_comparator(ctx->arch, f->op, f->val);
552 break; 523 break;
553 524
554 case AUDIT_EXIT: 525 case AUDIT_EXIT:
555 if (ctx && ctx->return !! 526 if (ctx && ctx->return_valid)
556 result = audit 527 result = audit_comparator(ctx->return_code, f->op, f->val);
557 break; 528 break;
558 case AUDIT_SUCCESS: 529 case AUDIT_SUCCESS:
559 if (ctx && ctx->return !! 530 if (ctx && ctx->return_valid) {
560 if (f->val) 531 if (f->val)
561 result 532 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_SUCCESS);
562 else 533 else
563 result 534 result = audit_comparator(ctx->return_valid, f->op, AUDITSC_FAILURE);
564 } 535 }
565 break; 536 break;
566 case AUDIT_DEVMAJOR: 537 case AUDIT_DEVMAJOR:
567 if (name) { 538 if (name) {
568 if (audit_comp 539 if (audit_comparator(MAJOR(name->dev), f->op, f->val) ||
569 audit_comp 540 audit_comparator(MAJOR(name->rdev), f->op, f->val))
570 ++resu 541 ++result;
571 } else if (ctx) { 542 } else if (ctx) {
572 list_for_each_ 543 list_for_each_entry(n, &ctx->names_list, list) {
573 if (au 544 if (audit_comparator(MAJOR(n->dev), f->op, f->val) ||
574 au 545 audit_comparator(MAJOR(n->rdev), f->op, f->val)) {
575 546 ++result;
576 547 break;
577 } 548 }
578 } 549 }
579 } 550 }
580 break; 551 break;
581 case AUDIT_DEVMINOR: 552 case AUDIT_DEVMINOR:
582 if (name) { 553 if (name) {
583 if (audit_comp 554 if (audit_comparator(MINOR(name->dev), f->op, f->val) ||
584 audit_comp 555 audit_comparator(MINOR(name->rdev), f->op, f->val))
585 ++resu 556 ++result;
586 } else if (ctx) { 557 } else if (ctx) {
587 list_for_each_ 558 list_for_each_entry(n, &ctx->names_list, list) {
588 if (au 559 if (audit_comparator(MINOR(n->dev), f->op, f->val) ||
589 au 560 audit_comparator(MINOR(n->rdev), f->op, f->val)) {
590 561 ++result;
591 562 break;
592 } 563 }
593 } 564 }
594 } 565 }
595 break; 566 break;
596 case AUDIT_INODE: 567 case AUDIT_INODE:
597 if (name) 568 if (name)
598 result = audit 569 result = audit_comparator(name->ino, f->op, f->val);
599 else if (ctx) { 570 else if (ctx) {
600 list_for_each_ 571 list_for_each_entry(n, &ctx->names_list, list) {
601 if (au 572 if (audit_comparator(n->ino, f->op, f->val)) {
602 573 ++result;
603 574 break;
604 } 575 }
605 } 576 }
606 } 577 }
607 break; 578 break;
608 case AUDIT_OBJ_UID: 579 case AUDIT_OBJ_UID:
609 if (name) { 580 if (name) {
610 result = audit 581 result = audit_uid_comparator(name->uid, f->op, f->uid);
611 } else if (ctx) { 582 } else if (ctx) {
612 list_for_each_ 583 list_for_each_entry(n, &ctx->names_list, list) {
613 if (au 584 if (audit_uid_comparator(n->uid, f->op, f->uid)) {
614 585 ++result;
615 586 break;
616 } 587 }
617 } 588 }
618 } 589 }
619 break; 590 break;
620 case AUDIT_OBJ_GID: 591 case AUDIT_OBJ_GID:
621 if (name) { 592 if (name) {
622 result = audit 593 result = audit_gid_comparator(name->gid, f->op, f->gid);
623 } else if (ctx) { 594 } else if (ctx) {
624 list_for_each_ 595 list_for_each_entry(n, &ctx->names_list, list) {
625 if (au 596 if (audit_gid_comparator(n->gid, f->op, f->gid)) {
626 597 ++result;
627 598 break;
628 } 599 }
629 } 600 }
630 } 601 }
631 break; 602 break;
632 case AUDIT_WATCH: 603 case AUDIT_WATCH:
633 if (name) { !! 604 if (name)
634 result = audit !! 605 result = audit_watch_compare(rule->watch, name->ino, name->dev);
635 <<
636 <<
637 if (f->op == A <<
638 result <<
639 } <<
640 break; 606 break;
641 case AUDIT_DIR: 607 case AUDIT_DIR:
642 if (ctx) { !! 608 if (ctx)
643 result = match 609 result = match_tree_refs(ctx, rule->tree);
644 if (f->op == A <<
645 result <<
646 } <<
647 break; 610 break;
648 case AUDIT_LOGINUID: 611 case AUDIT_LOGINUID:
649 result = audit_uid_com !! 612 result = audit_uid_comparator(tsk->loginuid, f->op, f->uid);
650 <<
651 break; 613 break;
652 case AUDIT_LOGINUID_SET: 614 case AUDIT_LOGINUID_SET:
653 result = audit_compara 615 result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val);
654 break; 616 break;
655 case AUDIT_SADDR_FAM: <<
656 if (ctx && ctx->sockad <<
657 result = audit <<
658 <<
659 break; <<
660 case AUDIT_SUBJ_USER: 617 case AUDIT_SUBJ_USER:
661 case AUDIT_SUBJ_ROLE: 618 case AUDIT_SUBJ_ROLE:
662 case AUDIT_SUBJ_TYPE: 619 case AUDIT_SUBJ_TYPE:
663 case AUDIT_SUBJ_SEN: 620 case AUDIT_SUBJ_SEN:
664 case AUDIT_SUBJ_CLR: 621 case AUDIT_SUBJ_CLR:
665 /* NOTE: this may retu 622 /* NOTE: this may return negative values indicating
666 a temporary error. 623 a temporary error. We simply treat this as a
667 match for now to av 624 match for now to avoid losing information that
668 may be wanted. An 625 may be wanted. An error message will also be
669 logged upon error * 626 logged upon error */
670 if (f->lsm_rule) { 627 if (f->lsm_rule) {
671 if (need_sid) 628 if (need_sid) {
672 /* @ts !! 629 security_task_getsecid(tsk, &sid);
673 * @cu <<
674 * for <<
675 * the <<
676 * of <<
677 * use <<
678 * her <<
679 * @cu <<
680 */ <<
681 securi <<
682 need_s 630 need_sid = 0;
683 } 631 }
684 result = secur 632 result = security_audit_rule_match(sid, f->type,
685 !! 633 f->op,
686 !! 634 f->lsm_rule,
>> 635 ctx);
687 } 636 }
688 break; 637 break;
689 case AUDIT_OBJ_USER: 638 case AUDIT_OBJ_USER:
690 case AUDIT_OBJ_ROLE: 639 case AUDIT_OBJ_ROLE:
691 case AUDIT_OBJ_TYPE: 640 case AUDIT_OBJ_TYPE:
692 case AUDIT_OBJ_LEV_LOW: 641 case AUDIT_OBJ_LEV_LOW:
693 case AUDIT_OBJ_LEV_HIGH: 642 case AUDIT_OBJ_LEV_HIGH:
694 /* The above note for 643 /* The above note for AUDIT_SUBJ_USER...AUDIT_SUBJ_CLR
695 also applies here * 644 also applies here */
696 if (f->lsm_rule) { 645 if (f->lsm_rule) {
697 /* Find files 646 /* Find files that match */
698 if (name) { 647 if (name) {
699 result 648 result = security_audit_rule_match(
700 !! 649 name->osid, f->type, f->op,
701 !! 650 f->lsm_rule, ctx);
702 <<
703 <<
704 } else if (ctx 651 } else if (ctx) {
705 list_f 652 list_for_each_entry(n, &ctx->names_list, list) {
706 !! 653 if (security_audit_rule_match(n->osid, f->type,
707 !! 654 f->op, f->lsm_rule,
708 !! 655 ctx)) {
709 <<
710 <<
711 656 ++result;
712 657 break;
713 658 }
714 } 659 }
715 } 660 }
716 /* Find ipc ob 661 /* Find ipc objects that match */
717 if (!ctx || ct 662 if (!ctx || ctx->type != AUDIT_IPC)
718 break; 663 break;
719 if (security_a 664 if (security_audit_rule_match(ctx->ipc.osid,
720 665 f->type, f->op,
721 !! 666 f->lsm_rule, ctx))
722 ++resu 667 ++result;
723 } 668 }
724 break; 669 break;
725 case AUDIT_ARG0: 670 case AUDIT_ARG0:
726 case AUDIT_ARG1: 671 case AUDIT_ARG1:
727 case AUDIT_ARG2: 672 case AUDIT_ARG2:
728 case AUDIT_ARG3: 673 case AUDIT_ARG3:
729 if (ctx) 674 if (ctx)
730 result = audit 675 result = audit_comparator(ctx->argv[f->type-AUDIT_ARG0], f->op, f->val);
731 break; 676 break;
732 case AUDIT_FILTERKEY: 677 case AUDIT_FILTERKEY:
733 /* ignore this field f 678 /* ignore this field for filtering */
734 result = 1; 679 result = 1;
735 break; 680 break;
736 case AUDIT_PERM: 681 case AUDIT_PERM:
737 result = audit_match_p 682 result = audit_match_perm(ctx, f->val);
738 if (f->op == Audit_not <<
739 result = !resu <<
740 break; 683 break;
741 case AUDIT_FILETYPE: 684 case AUDIT_FILETYPE:
742 result = audit_match_f 685 result = audit_match_filetype(ctx, f->val);
743 if (f->op == Audit_not <<
744 result = !resu <<
745 break; 686 break;
746 case AUDIT_FIELD_COMPARE: 687 case AUDIT_FIELD_COMPARE:
747 result = audit_field_c 688 result = audit_field_compare(tsk, cred, f, ctx, name);
748 break; 689 break;
749 } 690 }
750 if (!result) 691 if (!result)
751 return 0; 692 return 0;
752 } 693 }
753 694
754 if (ctx) { 695 if (ctx) {
>> 696 if (rule->prio <= ctx->prio)
>> 697 return 0;
755 if (rule->filterkey) { 698 if (rule->filterkey) {
756 kfree(ctx->filterkey); 699 kfree(ctx->filterkey);
757 ctx->filterkey = kstrd 700 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
758 } 701 }
759 ctx->prio = rule->prio; 702 ctx->prio = rule->prio;
760 } 703 }
761 switch (rule->action) { 704 switch (rule->action) {
762 case AUDIT_NEVER: 705 case AUDIT_NEVER:
763 *state = AUDIT_STATE_DISABLED; !! 706 *state = AUDIT_DISABLED;
764 break; 707 break;
765 case AUDIT_ALWAYS: 708 case AUDIT_ALWAYS:
766 *state = AUDIT_STATE_RECORD; !! 709 *state = AUDIT_RECORD_CONTEXT;
767 break; 710 break;
768 } 711 }
769 return 1; 712 return 1;
770 } 713 }
771 714
772 /* At process creation time, we can determine 715 /* At process creation time, we can determine if system-call auditing is
773 * completely disabled for this task. Since w 716 * completely disabled for this task. Since we only have the task
774 * structure at this point, we can only check 717 * structure at this point, we can only check uid and gid.
775 */ 718 */
776 static enum audit_state audit_filter_task(stru 719 static enum audit_state audit_filter_task(struct task_struct *tsk, char **key)
777 { 720 {
778 struct audit_entry *e; 721 struct audit_entry *e;
779 enum audit_state state; 722 enum audit_state state;
780 723
781 rcu_read_lock(); 724 rcu_read_lock();
782 list_for_each_entry_rcu(e, &audit_filt 725 list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_TASK], list) {
783 if (audit_filter_rules(tsk, &e 726 if (audit_filter_rules(tsk, &e->rule, NULL, NULL,
784 &state, 727 &state, true)) {
785 if (state == AUDIT_STA !! 728 if (state == AUDIT_RECORD_CONTEXT)
786 *key = kstrdup 729 *key = kstrdup(e->rule.filterkey, GFP_ATOMIC);
787 rcu_read_unlock(); 730 rcu_read_unlock();
788 return state; 731 return state;
789 } 732 }
790 } 733 }
791 rcu_read_unlock(); 734 rcu_read_unlock();
792 return AUDIT_STATE_BUILD; !! 735 return AUDIT_BUILD_CONTEXT;
793 } 736 }
794 737
795 static int audit_in_mask(const struct audit_kr 738 static int audit_in_mask(const struct audit_krule *rule, unsigned long val)
796 { 739 {
797 int word, bit; 740 int word, bit;
798 741
799 if (val > 0xffffffff) 742 if (val > 0xffffffff)
800 return false; 743 return false;
801 744
802 word = AUDIT_WORD(val); 745 word = AUDIT_WORD(val);
803 if (word >= AUDIT_BITMASK_SIZE) 746 if (word >= AUDIT_BITMASK_SIZE)
804 return false; 747 return false;
805 748
806 bit = AUDIT_BIT(val); 749 bit = AUDIT_BIT(val);
807 750
808 return rule->mask[word] & bit; 751 return rule->mask[word] & bit;
809 } 752 }
810 753
811 /** !! 754 /* At syscall entry and exit time, this filter is called if the
812 * __audit_filter_op - common filter helper fo !! 755 * audit_state is not low enough that auditing cannot take place, but is
813 * @tsk: associated task !! 756 * also not high enough that we already know we have to write an audit
814 * @ctx: audit context !! 757 * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
815 * @list: audit filter list !! 758 */
816 * @name: audit_name (can be NULL) !! 759 static enum audit_state audit_filter_syscall(struct task_struct *tsk,
817 * @op: current syscall/uring_op !! 760 struct audit_context *ctx,
818 * !! 761 struct list_head *list)
819 * Run the udit filters specified in @list aga <<
820 * @name, and @op, as necessary; the caller is <<
821 * that the call is made while the RCU read lo <<
822 * parameter can be NULL, but all others must <<
823 * Returns 1/true if the filter finds a match, <<
824 */ <<
825 static int __audit_filter_op(struct task_struc <<
826 struct audit_contex <<
827 struct list_head *l <<
828 struct audit_names <<
829 unsigned long op) <<
830 { 762 {
831 struct audit_entry *e; 763 struct audit_entry *e;
832 enum audit_state state; 764 enum audit_state state;
833 765
834 list_for_each_entry_rcu(e, list, list) <<
835 if (audit_in_mask(&e->rule, op <<
836 audit_filter_rules(tsk, &e <<
837 &state, <<
838 ctx->current_state = s <<
839 return 1; <<
840 } <<
841 } <<
842 return 0; <<
843 } <<
844 <<
845 /** <<
846 * audit_filter_uring - apply filters to an io <<
847 * @tsk: associated task <<
848 * @ctx: audit context <<
849 */ <<
850 static void audit_filter_uring(struct task_str <<
851 struct audit_co <<
852 { <<
853 if (auditd_test_task(tsk)) <<
854 return; <<
855 <<
856 rcu_read_lock(); <<
857 __audit_filter_op(tsk, ctx, &audit_fil <<
858 NULL, ctx->uring_op); <<
859 rcu_read_unlock(); <<
860 } <<
861 <<
862 /* At syscall exit time, this filter is called <<
863 * not low enough that auditing cannot take pl <<
864 * high enough that we already know we have to <<
865 * (i.e., the state is AUDIT_STATE_BUILD). <<
866 */ <<
867 static void audit_filter_syscall(struct task_s <<
868 struct audit_ <<
869 { <<
870 if (auditd_test_task(tsk)) 766 if (auditd_test_task(tsk))
871 return; !! 767 return AUDIT_DISABLED;
872 768
873 rcu_read_lock(); 769 rcu_read_lock();
874 __audit_filter_op(tsk, ctx, &audit_fil !! 770 if (!list_empty(list)) {
875 NULL, ctx->major); !! 771 list_for_each_entry_rcu(e, list, list) {
>> 772 if (audit_in_mask(&e->rule, ctx->major) &&
>> 773 audit_filter_rules(tsk, &e->rule, ctx, NULL,
>> 774 &state, false)) {
>> 775 rcu_read_unlock();
>> 776 ctx->current_state = state;
>> 777 return state;
>> 778 }
>> 779 }
>> 780 }
876 rcu_read_unlock(); 781 rcu_read_unlock();
>> 782 return AUDIT_BUILD_CONTEXT;
877 } 783 }
878 784
879 /* 785 /*
880 * Given an audit_name check the inode hash ta 786 * Given an audit_name check the inode hash table to see if they match.
881 * Called holding the rcu read lock to protect 787 * Called holding the rcu read lock to protect the use of audit_inode_hash
882 */ 788 */
883 static int audit_filter_inode_name(struct task 789 static int audit_filter_inode_name(struct task_struct *tsk,
884 struct audi 790 struct audit_names *n,
885 struct audi !! 791 struct audit_context *ctx) {
886 { <<
887 int h = audit_hash_ino((u32)n->ino); 792 int h = audit_hash_ino((u32)n->ino);
888 struct list_head *list = &audit_inode_ 793 struct list_head *list = &audit_inode_hash[h];
>> 794 struct audit_entry *e;
>> 795 enum audit_state state;
889 796
890 return __audit_filter_op(tsk, ctx, lis !! 797 if (list_empty(list))
>> 798 return 0;
>> 799
>> 800 list_for_each_entry_rcu(e, list, list) {
>> 801 if (audit_in_mask(&e->rule, ctx->major) &&
>> 802 audit_filter_rules(tsk, &e->rule, ctx, n, &state, false)) {
>> 803 ctx->current_state = state;
>> 804 return 1;
>> 805 }
>> 806 }
>> 807
>> 808 return 0;
891 } 809 }
892 810
893 /* At syscall exit time, this filter is called 811 /* At syscall exit time, this filter is called if any audit_names have been
894 * collected during syscall processing. We on 812 * collected during syscall processing. We only check rules in sublists at hash
895 * buckets applicable to the inode numbers in 813 * buckets applicable to the inode numbers in audit_names.
896 * Regarding audit_state, same rules apply as 814 * Regarding audit_state, same rules apply as for audit_filter_syscall().
897 */ 815 */
898 void audit_filter_inodes(struct task_struct *t 816 void audit_filter_inodes(struct task_struct *tsk, struct audit_context *ctx)
899 { 817 {
900 struct audit_names *n; 818 struct audit_names *n;
901 819
902 if (auditd_test_task(tsk)) 820 if (auditd_test_task(tsk))
903 return; 821 return;
904 822
905 rcu_read_lock(); 823 rcu_read_lock();
906 824
907 list_for_each_entry(n, &ctx->names_lis 825 list_for_each_entry(n, &ctx->names_list, list) {
908 if (audit_filter_inode_name(ts 826 if (audit_filter_inode_name(tsk, n, ctx))
909 break; 827 break;
910 } 828 }
911 rcu_read_unlock(); 829 rcu_read_unlock();
912 } 830 }
913 831
>> 832 /* Transfer the audit context pointer to the caller, clearing it in the tsk's struct */
>> 833 static inline struct audit_context *audit_take_context(struct task_struct *tsk,
>> 834 int return_valid,
>> 835 long return_code)
>> 836 {
>> 837 struct audit_context *context = tsk->audit_context;
>> 838
>> 839 if (!context)
>> 840 return NULL;
>> 841 context->return_valid = return_valid;
>> 842
>> 843 /*
>> 844 * we need to fix up the return code in the audit logs if the actual
>> 845 * return codes are later going to be fixed up by the arch specific
>> 846 * signal handlers
>> 847 *
>> 848 * This is actually a test for:
>> 849 * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
>> 850 * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
>> 851 *
>> 852 * but is faster than a bunch of ||
>> 853 */
>> 854 if (unlikely(return_code <= -ERESTARTSYS) &&
>> 855 (return_code >= -ERESTART_RESTARTBLOCK) &&
>> 856 (return_code != -ENOIOCTLCMD))
>> 857 context->return_code = -EINTR;
>> 858 else
>> 859 context->return_code = return_code;
>> 860
>> 861 if (context->in_syscall && !context->dummy) {
>> 862 audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
>> 863 audit_filter_inodes(tsk, context);
>> 864 }
>> 865
>> 866 tsk->audit_context = NULL;
>> 867 return context;
>> 868 }
>> 869
914 static inline void audit_proctitle_free(struct 870 static inline void audit_proctitle_free(struct audit_context *context)
915 { 871 {
916 kfree(context->proctitle.value); 872 kfree(context->proctitle.value);
917 context->proctitle.value = NULL; 873 context->proctitle.value = NULL;
918 context->proctitle.len = 0; 874 context->proctitle.len = 0;
919 } 875 }
920 876
921 static inline void audit_free_module(struct au <<
922 { <<
923 if (context->type == AUDIT_KERN_MODULE <<
924 kfree(context->module.name); <<
925 context->module.name = NULL; <<
926 } <<
927 } <<
928 static inline void audit_free_names(struct aud 877 static inline void audit_free_names(struct audit_context *context)
929 { 878 {
930 struct audit_names *n, *next; 879 struct audit_names *n, *next;
931 880
932 list_for_each_entry_safe(n, next, &con 881 list_for_each_entry_safe(n, next, &context->names_list, list) {
933 list_del(&n->list); 882 list_del(&n->list);
934 if (n->name) 883 if (n->name)
935 putname(n->name); 884 putname(n->name);
936 if (n->should_free) 885 if (n->should_free)
937 kfree(n); 886 kfree(n);
938 } 887 }
939 context->name_count = 0; 888 context->name_count = 0;
940 path_put(&context->pwd); 889 path_put(&context->pwd);
941 context->pwd.dentry = NULL; 890 context->pwd.dentry = NULL;
942 context->pwd.mnt = NULL; 891 context->pwd.mnt = NULL;
943 } 892 }
944 893
945 static inline void audit_free_aux(struct audit 894 static inline void audit_free_aux(struct audit_context *context)
946 { 895 {
947 struct audit_aux_data *aux; 896 struct audit_aux_data *aux;
948 897
949 while ((aux = context->aux)) { 898 while ((aux = context->aux)) {
950 context->aux = aux->next; 899 context->aux = aux->next;
951 kfree(aux); 900 kfree(aux);
952 } 901 }
953 context->aux = NULL; <<
954 while ((aux = context->aux_pids)) { 902 while ((aux = context->aux_pids)) {
955 context->aux_pids = aux->next; 903 context->aux_pids = aux->next;
956 kfree(aux); 904 kfree(aux);
957 } 905 }
958 context->aux_pids = NULL; <<
959 } <<
960 <<
961 /** <<
962 * audit_reset_context - reset a audit_context <<
963 * @ctx: the audit_context to reset <<
964 * <<
965 * All fields in the audit_context will be res <<
966 * references held by fields will be dropped, <<
967 * released. When this function returns the a <<
968 * for reuse, so long as the passed context is <<
969 */ <<
970 static void audit_reset_context(struct audit_c <<
971 { <<
972 if (!ctx) <<
973 return; <<
974 <<
975 /* if ctx is non-null, reset the "ctx- <<
976 ctx->context = AUDIT_CTX_UNUSED; <<
977 if (ctx->dummy) <<
978 return; <<
979 <<
980 /* <<
981 * NOTE: It shouldn't matter in what o <<
982 * release them in the order in <<
983 * this gives us some hope of qu <<
984 * resetting the audit_context p <<
985 * <<
986 * Other things worth mentioning <<
987 * - we don't reset "dummy" <<
988 * - we don't reset "state", we <<
989 * - we preserve "filterkey" if <<
990 * - much of this is likely over <<
991 * - we really need to work on i <<
992 */ <<
993 <<
994 ctx->current_state = ctx->state; <<
995 ctx->serial = 0; <<
996 ctx->major = 0; <<
997 ctx->uring_op = 0; <<
998 ctx->ctime = (struct timespec64){ .tv_ <<
999 memset(ctx->argv, 0, sizeof(ctx->argv) <<
1000 ctx->return_code = 0; <<
1001 ctx->prio = (ctx->state == AUDIT_STAT <<
1002 ctx->return_valid = AUDITSC_INVALID; <<
1003 audit_free_names(ctx); <<
1004 if (ctx->state != AUDIT_STATE_RECORD) <<
1005 kfree(ctx->filterkey); <<
1006 ctx->filterkey = NULL; <<
1007 } <<
1008 audit_free_aux(ctx); <<
1009 kfree(ctx->sockaddr); <<
1010 ctx->sockaddr = NULL; <<
1011 ctx->sockaddr_len = 0; <<
1012 ctx->ppid = 0; <<
1013 ctx->uid = ctx->euid = ctx->suid = ct <<
1014 ctx->gid = ctx->egid = ctx->sgid = ct <<
1015 ctx->personality = 0; <<
1016 ctx->arch = 0; <<
1017 ctx->target_pid = 0; <<
1018 ctx->target_auid = ctx->target_uid = <<
1019 ctx->target_sessionid = 0; <<
1020 ctx->target_sid = 0; <<
1021 ctx->target_comm[0] = '\0'; <<
1022 unroll_tree_refs(ctx, NULL, 0); <<
1023 WARN_ON(!list_empty(&ctx->killed_tree <<
1024 audit_free_module(ctx); <<
1025 ctx->fds[0] = -1; <<
1026 ctx->type = 0; /* reset last for audi <<
1027 } 906 }
1028 907
1029 static inline struct audit_context *audit_all 908 static inline struct audit_context *audit_alloc_context(enum audit_state state)
1030 { 909 {
1031 struct audit_context *context; 910 struct audit_context *context;
1032 911
1033 context = kzalloc(sizeof(*context), G 912 context = kzalloc(sizeof(*context), GFP_KERNEL);
1034 if (!context) 913 if (!context)
1035 return NULL; 914 return NULL;
1036 context->context = AUDIT_CTX_UNUSED; <<
1037 context->state = state; 915 context->state = state;
1038 context->prio = state == AUDIT_STATE_ !! 916 context->prio = state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
1039 INIT_LIST_HEAD(&context->killed_trees 917 INIT_LIST_HEAD(&context->killed_trees);
1040 INIT_LIST_HEAD(&context->names_list); 918 INIT_LIST_HEAD(&context->names_list);
1041 context->fds[0] = -1; <<
1042 context->return_valid = AUDITSC_INVAL <<
1043 return context; 919 return context;
1044 } 920 }
1045 921
1046 /** 922 /**
1047 * audit_alloc - allocate an audit context bl 923 * audit_alloc - allocate an audit context block for a task
1048 * @tsk: task 924 * @tsk: task
1049 * 925 *
1050 * Filter on the task information and allocat 926 * Filter on the task information and allocate a per-task audit context
1051 * if necessary. Doing so turns on system ca 927 * if necessary. Doing so turns on system call auditing for the
1052 * specified task. This is called from copy_ 928 * specified task. This is called from copy_process, so no lock is
1053 * needed. 929 * needed.
1054 */ 930 */
1055 int audit_alloc(struct task_struct *tsk) 931 int audit_alloc(struct task_struct *tsk)
1056 { 932 {
1057 struct audit_context *context; 933 struct audit_context *context;
1058 enum audit_state state; 934 enum audit_state state;
1059 char *key = NULL; 935 char *key = NULL;
1060 936
1061 if (likely(!audit_ever_enabled)) 937 if (likely(!audit_ever_enabled))
1062 return 0; !! 938 return 0; /* Return if not auditing. */
1063 939
1064 state = audit_filter_task(tsk, &key); 940 state = audit_filter_task(tsk, &key);
1065 if (state == AUDIT_STATE_DISABLED) { !! 941 if (state == AUDIT_DISABLED) {
1066 clear_task_syscall_work(tsk, !! 942 clear_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
1067 return 0; 943 return 0;
1068 } 944 }
1069 945
1070 context = audit_alloc_context(state); !! 946 if (!(context = audit_alloc_context(state))) {
1071 if (!context) { <<
1072 kfree(key); 947 kfree(key);
1073 audit_log_lost("out of memory 948 audit_log_lost("out of memory in audit_alloc");
1074 return -ENOMEM; 949 return -ENOMEM;
1075 } 950 }
1076 context->filterkey = key; 951 context->filterkey = key;
1077 952
1078 audit_set_context(tsk, context); !! 953 tsk->audit_context = context;
1079 set_task_syscall_work(tsk, SYSCALL_AU !! 954 set_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT);
1080 return 0; 955 return 0;
1081 } 956 }
1082 957
1083 static inline void audit_free_context(struct 958 static inline void audit_free_context(struct audit_context *context)
1084 { 959 {
1085 /* resetting is extra work, but it is !! 960 audit_free_names(context);
1086 audit_reset_context(context); !! 961 unroll_tree_refs(context, NULL, 0);
1087 audit_proctitle_free(context); <<
1088 free_tree_refs(context); 962 free_tree_refs(context);
>> 963 audit_free_aux(context);
1089 kfree(context->filterkey); 964 kfree(context->filterkey);
>> 965 kfree(context->sockaddr);
>> 966 audit_proctitle_free(context);
1090 kfree(context); 967 kfree(context);
1091 } 968 }
1092 969
1093 static int audit_log_pid_context(struct audit 970 static int audit_log_pid_context(struct audit_context *context, pid_t pid,
1094 kuid_t auid, 971 kuid_t auid, kuid_t uid, unsigned int sessionid,
1095 u32 sid, cha 972 u32 sid, char *comm)
1096 { 973 {
1097 struct audit_buffer *ab; 974 struct audit_buffer *ab;
1098 char *ctx = NULL; 975 char *ctx = NULL;
1099 u32 len; 976 u32 len;
1100 int rc = 0; 977 int rc = 0;
1101 978
1102 ab = audit_log_start(context, GFP_KER 979 ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
1103 if (!ab) 980 if (!ab)
1104 return rc; 981 return rc;
1105 982
1106 audit_log_format(ab, "opid=%d oauid=% 983 audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid,
1107 from_kuid(&init_user 984 from_kuid(&init_user_ns, auid),
1108 from_kuid(&init_user 985 from_kuid(&init_user_ns, uid), sessionid);
1109 if (sid) { 986 if (sid) {
1110 if (security_secid_to_secctx( 987 if (security_secid_to_secctx(sid, &ctx, &len)) {
1111 audit_log_format(ab, 988 audit_log_format(ab, " obj=(none)");
1112 rc = 1; 989 rc = 1;
1113 } else { 990 } else {
1114 audit_log_format(ab, 991 audit_log_format(ab, " obj=%s", ctx);
1115 security_release_secc 992 security_release_secctx(ctx, len);
1116 } 993 }
1117 } 994 }
1118 audit_log_format(ab, " ocomm="); 995 audit_log_format(ab, " ocomm=");
1119 audit_log_untrustedstring(ab, comm); 996 audit_log_untrustedstring(ab, comm);
1120 audit_log_end(ab); 997 audit_log_end(ab);
1121 998
1122 return rc; 999 return rc;
1123 } 1000 }
1124 1001
1125 static void audit_log_execve_info(struct audi 1002 static void audit_log_execve_info(struct audit_context *context,
1126 struct audi 1003 struct audit_buffer **ab)
1127 { 1004 {
1128 long len_max; 1005 long len_max;
1129 long len_rem; 1006 long len_rem;
1130 long len_full; 1007 long len_full;
1131 long len_buf; 1008 long len_buf;
1132 long len_abuf = 0; 1009 long len_abuf = 0;
1133 long len_tmp; 1010 long len_tmp;
1134 bool require_data; 1011 bool require_data;
1135 bool encode; 1012 bool encode;
1136 unsigned int iter; 1013 unsigned int iter;
1137 unsigned int arg; 1014 unsigned int arg;
1138 char *buf_head; 1015 char *buf_head;
1139 char *buf; 1016 char *buf;
1140 const char __user *p = (const char __ 1017 const char __user *p = (const char __user *)current->mm->arg_start;
1141 1018
1142 /* NOTE: this buffer needs to be larg 1019 /* NOTE: this buffer needs to be large enough to hold all the non-arg
1143 * data we put in the audit rec 1020 * data we put in the audit record for this argument (see the
1144 * code below) ... at this poin 1021 * code below) ... at this point in time 96 is plenty */
1145 char abuf[96]; 1022 char abuf[96];
1146 1023
1147 /* NOTE: we set MAX_EXECVE_AUDIT_LEN 1024 /* NOTE: we set MAX_EXECVE_AUDIT_LEN to a rather arbitrary limit, the
1148 * current value of 7500 is not 1025 * current value of 7500 is not as important as the fact that it
1149 * is less than 8k, a setting o 1026 * is less than 8k, a setting of 7500 gives us plenty of wiggle
1150 * room if we go over a little 1027 * room if we go over a little bit in the logging below */
1151 WARN_ON_ONCE(MAX_EXECVE_AUDIT_LEN > 7 1028 WARN_ON_ONCE(MAX_EXECVE_AUDIT_LEN > 7500);
1152 len_max = MAX_EXECVE_AUDIT_LEN; 1029 len_max = MAX_EXECVE_AUDIT_LEN;
1153 1030
1154 /* scratch buffer to hold the userspa 1031 /* scratch buffer to hold the userspace args */
1155 buf_head = kmalloc(MAX_EXECVE_AUDIT_L 1032 buf_head = kmalloc(MAX_EXECVE_AUDIT_LEN + 1, GFP_KERNEL);
1156 if (!buf_head) { 1033 if (!buf_head) {
1157 audit_panic("out of memory fo 1034 audit_panic("out of memory for argv string");
1158 return; 1035 return;
1159 } 1036 }
1160 buf = buf_head; 1037 buf = buf_head;
1161 1038
1162 audit_log_format(*ab, "argc=%d", cont 1039 audit_log_format(*ab, "argc=%d", context->execve.argc);
1163 1040
1164 len_rem = len_max; 1041 len_rem = len_max;
1165 len_buf = 0; 1042 len_buf = 0;
1166 len_full = 0; 1043 len_full = 0;
1167 require_data = true; 1044 require_data = true;
1168 encode = false; 1045 encode = false;
1169 iter = 0; 1046 iter = 0;
1170 arg = 0; 1047 arg = 0;
1171 do { 1048 do {
1172 /* NOTE: we don't ever want t 1049 /* NOTE: we don't ever want to trust this value for anything
1173 * serious, but the aud 1050 * serious, but the audit record format insists we
1174 * provide an argument 1051 * provide an argument length for really long arguments,
1175 * e.g. > MAX_EXECVE_AU 1052 * e.g. > MAX_EXECVE_AUDIT_LEN, so we have no choice but
1176 * to use strncpy_from_ 1053 * to use strncpy_from_user() to obtain this value for
1177 * recording in the log 1054 * recording in the log, although we don't use it
1178 * anywhere here to avo 1055 * anywhere here to avoid a double-fetch problem */
1179 if (len_full == 0) 1056 if (len_full == 0)
1180 len_full = strnlen_us 1057 len_full = strnlen_user(p, MAX_ARG_STRLEN) - 1;
1181 1058
1182 /* read more data from usersp 1059 /* read more data from userspace */
1183 if (require_data) { 1060 if (require_data) {
1184 /* can we make more r 1061 /* can we make more room in the buffer? */
1185 if (buf != buf_head) 1062 if (buf != buf_head) {
1186 memmove(buf_h 1063 memmove(buf_head, buf, len_buf);
1187 buf = buf_hea 1064 buf = buf_head;
1188 } 1065 }
1189 1066
1190 /* fetch as much as w 1067 /* fetch as much as we can of the argument */
1191 len_tmp = strncpy_fro 1068 len_tmp = strncpy_from_user(&buf_head[len_buf], p,
1192 1069 len_max - len_buf);
1193 if (len_tmp == -EFAUL 1070 if (len_tmp == -EFAULT) {
1194 /* unable to 1071 /* unable to copy from userspace */
1195 send_sig(SIGK 1072 send_sig(SIGKILL, current, 0);
1196 goto out; 1073 goto out;
1197 } else if (len_tmp == 1074 } else if (len_tmp == (len_max - len_buf)) {
1198 /* buffer is 1075 /* buffer is not large enough */
1199 require_data 1076 require_data = true;
1200 /* NOTE: if w 1077 /* NOTE: if we are going to span multiple
1201 * buff 1078 * buffers force the encoding so we stand
1202 * a ch 1079 * a chance at a sane len_full value and
1203 * cons 1080 * consistent record encoding */
1204 encode = true 1081 encode = true;
1205 len_full = le 1082 len_full = len_full * 2;
1206 p += len_tmp; 1083 p += len_tmp;
1207 } else { 1084 } else {
1208 require_data 1085 require_data = false;
1209 if (!encode) 1086 if (!encode)
1210 encod 1087 encode = audit_string_contains_control(
1211 1088 buf, len_tmp);
1212 /* try to use 1089 /* try to use a trusted value for len_full */
1213 if (len_full 1090 if (len_full < len_max)
1214 len_f 1091 len_full = (encode ?
1215 1092 len_tmp * 2 : len_tmp);
1216 p += len_tmp 1093 p += len_tmp + 1;
1217 } 1094 }
1218 len_buf += len_tmp; 1095 len_buf += len_tmp;
1219 buf_head[len_buf] = ' 1096 buf_head[len_buf] = '\0';
1220 1097
1221 /* length of the buff 1098 /* length of the buffer in the audit record? */
1222 len_abuf = (encode ? 1099 len_abuf = (encode ? len_buf * 2 : len_buf + 2);
1223 } 1100 }
1224 1101
1225 /* write as much as we can to 1102 /* write as much as we can to the audit log */
1226 if (len_buf >= 0) { !! 1103 if (len_buf > 0) {
1227 /* NOTE: some magic n 1104 /* NOTE: some magic numbers here - basically if we
1228 * can't fit a 1105 * can't fit a reasonable amount of data into the
1229 * existing aud 1106 * existing audit buffer, flush it and start with
1230 * a new buffer 1107 * a new buffer */
1231 if ((sizeof(abuf) + 8 1108 if ((sizeof(abuf) + 8) > len_rem) {
1232 len_rem = len 1109 len_rem = len_max;
1233 audit_log_end 1110 audit_log_end(*ab);
1234 *ab = audit_l 1111 *ab = audit_log_start(context,
1235 1112 GFP_KERNEL, AUDIT_EXECVE);
1236 if (!*ab) 1113 if (!*ab)
1237 goto 1114 goto out;
1238 } 1115 }
1239 1116
1240 /* create the non-arg 1117 /* create the non-arg portion of the arg record */
1241 len_tmp = 0; 1118 len_tmp = 0;
1242 if (require_data || ( 1119 if (require_data || (iter > 0) ||
1243 ((len_abuf + size 1120 ((len_abuf + sizeof(abuf)) > len_rem)) {
1244 if (iter == 0 1121 if (iter == 0) {
1245 len_t 1122 len_tmp += snprintf(&abuf[len_tmp],
1246 1123 sizeof(abuf) - len_tmp,
1247 1124 " a%d_len=%lu",
1248 1125 arg, len_full);
1249 } 1126 }
1250 len_tmp += sn 1127 len_tmp += snprintf(&abuf[len_tmp],
1251 1128 sizeof(abuf) - len_tmp,
1252 1129 " a%d[%d]=", arg, iter++);
1253 } else 1130 } else
1254 len_tmp += sn 1131 len_tmp += snprintf(&abuf[len_tmp],
1255 1132 sizeof(abuf) - len_tmp,
1256 1133 " a%d=", arg);
1257 WARN_ON(len_tmp >= si 1134 WARN_ON(len_tmp >= sizeof(abuf));
1258 abuf[sizeof(abuf) - 1 1135 abuf[sizeof(abuf) - 1] = '\0';
1259 1136
1260 /* log the arg in the 1137 /* log the arg in the audit record */
1261 audit_log_format(*ab, 1138 audit_log_format(*ab, "%s", abuf);
1262 len_rem -= len_tmp; 1139 len_rem -= len_tmp;
1263 len_tmp = len_buf; 1140 len_tmp = len_buf;
1264 if (encode) { 1141 if (encode) {
1265 if (len_abuf 1142 if (len_abuf > len_rem)
1266 len_t 1143 len_tmp = len_rem / 2; /* encoding */
1267 audit_log_n_h 1144 audit_log_n_hex(*ab, buf, len_tmp);
1268 len_rem -= le 1145 len_rem -= len_tmp * 2;
1269 len_abuf -= l 1146 len_abuf -= len_tmp * 2;
1270 } else { 1147 } else {
1271 if (len_abuf 1148 if (len_abuf > len_rem)
1272 len_t 1149 len_tmp = len_rem - 2; /* quotes */
1273 audit_log_n_s 1150 audit_log_n_string(*ab, buf, len_tmp);
1274 len_rem -= le 1151 len_rem -= len_tmp + 2;
1275 /* don't subt 1152 /* don't subtract the "2" because we still need
1276 * to add quo 1153 * to add quotes to the remaining string */
1277 len_abuf -= l 1154 len_abuf -= len_tmp;
1278 } 1155 }
1279 len_buf -= len_tmp; 1156 len_buf -= len_tmp;
1280 buf += len_tmp; 1157 buf += len_tmp;
1281 } 1158 }
1282 1159
1283 /* ready to move to the next 1160 /* ready to move to the next argument? */
1284 if ((len_buf == 0) && !requir 1161 if ((len_buf == 0) && !require_data) {
1285 arg++; 1162 arg++;
1286 iter = 0; 1163 iter = 0;
1287 len_full = 0; 1164 len_full = 0;
1288 require_data = true; 1165 require_data = true;
1289 encode = false; 1166 encode = false;
1290 } 1167 }
1291 } while (arg < context->execve.argc); 1168 } while (arg < context->execve.argc);
1292 1169
1293 /* NOTE: the caller handles the final 1170 /* NOTE: the caller handles the final audit_log_end() call */
1294 1171
1295 out: 1172 out:
1296 kfree(buf_head); 1173 kfree(buf_head);
1297 } 1174 }
1298 1175
1299 static void audit_log_cap(struct audit_buffer <<
1300 kernel_cap_t *cap) <<
1301 { <<
1302 if (cap_isclear(*cap)) { <<
1303 audit_log_format(ab, " %s=0", <<
1304 return; <<
1305 } <<
1306 audit_log_format(ab, " %s=%016llx", p <<
1307 } <<
1308 <<
1309 static void audit_log_fcaps(struct audit_buff <<
1310 { <<
1311 if (name->fcap_ver == -1) { <<
1312 audit_log_format(ab, " cap_fe <<
1313 return; <<
1314 } <<
1315 audit_log_cap(ab, "cap_fp", &name->fc <<
1316 audit_log_cap(ab, "cap_fi", &name->fc <<
1317 audit_log_format(ab, " cap_fe=%d cap_ <<
1318 name->fcap.fE, name- <<
1319 from_kuid(&init_user <<
1320 } <<
1321 <<
1322 static void audit_log_time(struct audit_conte <<
1323 { <<
1324 const struct audit_ntp_data *ntp = &c <<
1325 const struct timespec64 *tk = &contex <<
1326 static const char * const ntp_name[] <<
1327 "offset", <<
1328 "freq", <<
1329 "status", <<
1330 "tai", <<
1331 "tick", <<
1332 "adjust", <<
1333 }; <<
1334 int type; <<
1335 <<
1336 if (context->type == AUDIT_TIME_ADJNT <<
1337 for (type = 0; type < AUDIT_N <<
1338 if (ntp->vals[type].n <<
1339 if (!*ab) { <<
1340 *ab = <<
1341 <<
1342 <<
1343 if (! <<
1344 <<
1345 } <<
1346 audit_log_for <<
1347 <<
1348 <<
1349 <<
1350 audit_log_end <<
1351 *ab = NULL; <<
1352 } <<
1353 } <<
1354 } <<
1355 if (tk->tv_sec != 0 || tk->tv_nsec != <<
1356 if (!*ab) { <<
1357 *ab = audit_log_start <<
1358 <<
1359 if (!*ab) <<
1360 return; <<
1361 } <<
1362 audit_log_format(*ab, "sec=%l <<
1363 (long long)t <<
1364 audit_log_end(*ab); <<
1365 *ab = NULL; <<
1366 } <<
1367 } <<
1368 <<
1369 static void show_special(struct audit_context 1176 static void show_special(struct audit_context *context, int *call_panic)
1370 { 1177 {
1371 struct audit_buffer *ab; 1178 struct audit_buffer *ab;
1372 int i; 1179 int i;
1373 1180
1374 ab = audit_log_start(context, GFP_KER 1181 ab = audit_log_start(context, GFP_KERNEL, context->type);
1375 if (!ab) 1182 if (!ab)
1376 return; 1183 return;
1377 1184
1378 switch (context->type) { 1185 switch (context->type) {
1379 case AUDIT_SOCKETCALL: { 1186 case AUDIT_SOCKETCALL: {
1380 int nargs = context->socketca 1187 int nargs = context->socketcall.nargs;
1381 <<
1382 audit_log_format(ab, "nargs=% 1188 audit_log_format(ab, "nargs=%d", nargs);
1383 for (i = 0; i < nargs; i++) 1189 for (i = 0; i < nargs; i++)
1384 audit_log_format(ab, 1190 audit_log_format(ab, " a%d=%lx", i,
1385 context->sock 1191 context->socketcall.args[i]);
1386 break; } 1192 break; }
1387 case AUDIT_IPC: { 1193 case AUDIT_IPC: {
1388 u32 osid = context->ipc.osid; 1194 u32 osid = context->ipc.osid;
1389 1195
1390 audit_log_format(ab, "ouid=%u 1196 audit_log_format(ab, "ouid=%u ogid=%u mode=%#ho",
1391 from_kuid(&i 1197 from_kuid(&init_user_ns, context->ipc.uid),
1392 from_kgid(&i 1198 from_kgid(&init_user_ns, context->ipc.gid),
1393 context->ipc 1199 context->ipc.mode);
1394 if (osid) { 1200 if (osid) {
1395 char *ctx = NULL; 1201 char *ctx = NULL;
1396 u32 len; 1202 u32 len;
1397 <<
1398 if (security_secid_to 1203 if (security_secid_to_secctx(osid, &ctx, &len)) {
1399 audit_log_for 1204 audit_log_format(ab, " osid=%u", osid);
1400 *call_panic = 1205 *call_panic = 1;
1401 } else { 1206 } else {
1402 audit_log_for 1207 audit_log_format(ab, " obj=%s", ctx);
1403 security_rele 1208 security_release_secctx(ctx, len);
1404 } 1209 }
1405 } 1210 }
1406 if (context->ipc.has_perm) { 1211 if (context->ipc.has_perm) {
1407 audit_log_end(ab); 1212 audit_log_end(ab);
1408 ab = audit_log_start( 1213 ab = audit_log_start(context, GFP_KERNEL,
1409 1214 AUDIT_IPC_SET_PERM);
1410 if (unlikely(!ab)) 1215 if (unlikely(!ab))
1411 return; 1216 return;
1412 audit_log_format(ab, 1217 audit_log_format(ab,
1413 "qbytes=%lx o 1218 "qbytes=%lx ouid=%u ogid=%u mode=%#ho",
1414 context->ipc. 1219 context->ipc.qbytes,
1415 context->ipc. 1220 context->ipc.perm_uid,
1416 context->ipc. 1221 context->ipc.perm_gid,
1417 context->ipc. 1222 context->ipc.perm_mode);
1418 } 1223 }
1419 break; } 1224 break; }
1420 case AUDIT_MQ_OPEN: 1225 case AUDIT_MQ_OPEN:
1421 audit_log_format(ab, 1226 audit_log_format(ab,
1422 "oflag=0x%x mode=%#ho 1227 "oflag=0x%x mode=%#ho mq_flags=0x%lx mq_maxmsg=%ld "
1423 "mq_msgsize=%ld mq_cu 1228 "mq_msgsize=%ld mq_curmsgs=%ld",
1424 context->mq_open.ofla 1229 context->mq_open.oflag, context->mq_open.mode,
1425 context->mq_open.attr 1230 context->mq_open.attr.mq_flags,
1426 context->mq_open.attr 1231 context->mq_open.attr.mq_maxmsg,
1427 context->mq_open.attr 1232 context->mq_open.attr.mq_msgsize,
1428 context->mq_open.attr 1233 context->mq_open.attr.mq_curmsgs);
1429 break; 1234 break;
1430 case AUDIT_MQ_SENDRECV: 1235 case AUDIT_MQ_SENDRECV:
1431 audit_log_format(ab, 1236 audit_log_format(ab,
1432 "mqdes=%d msg_len=%zd 1237 "mqdes=%d msg_len=%zd msg_prio=%u "
1433 "abs_timeout_sec=%lld 1238 "abs_timeout_sec=%lld abs_timeout_nsec=%ld",
1434 context->mq_sendrecv. 1239 context->mq_sendrecv.mqdes,
1435 context->mq_sendrecv. 1240 context->mq_sendrecv.msg_len,
1436 context->mq_sendrecv. 1241 context->mq_sendrecv.msg_prio,
1437 (long long) context-> 1242 (long long) context->mq_sendrecv.abs_timeout.tv_sec,
1438 context->mq_sendrecv. 1243 context->mq_sendrecv.abs_timeout.tv_nsec);
1439 break; 1244 break;
1440 case AUDIT_MQ_NOTIFY: 1245 case AUDIT_MQ_NOTIFY:
1441 audit_log_format(ab, "mqdes=% 1246 audit_log_format(ab, "mqdes=%d sigev_signo=%d",
1442 context->mq_n 1247 context->mq_notify.mqdes,
1443 context->mq_n 1248 context->mq_notify.sigev_signo);
1444 break; 1249 break;
1445 case AUDIT_MQ_GETSETATTR: { 1250 case AUDIT_MQ_GETSETATTR: {
1446 struct mq_attr *attr = &conte 1251 struct mq_attr *attr = &context->mq_getsetattr.mqstat;
1447 <<
1448 audit_log_format(ab, 1252 audit_log_format(ab,
1449 "mqdes=%d mq_flags=0x 1253 "mqdes=%d mq_flags=0x%lx mq_maxmsg=%ld mq_msgsize=%ld "
1450 "mq_curmsgs=%ld ", 1254 "mq_curmsgs=%ld ",
1451 context->mq_getsetatt 1255 context->mq_getsetattr.mqdes,
1452 attr->mq_flags, attr- 1256 attr->mq_flags, attr->mq_maxmsg,
1453 attr->mq_msgsize, att 1257 attr->mq_msgsize, attr->mq_curmsgs);
1454 break; } 1258 break; }
1455 case AUDIT_CAPSET: 1259 case AUDIT_CAPSET:
1456 audit_log_format(ab, "pid=%d" 1260 audit_log_format(ab, "pid=%d", context->capset.pid);
1457 audit_log_cap(ab, "cap_pi", & 1261 audit_log_cap(ab, "cap_pi", &context->capset.cap.inheritable);
1458 audit_log_cap(ab, "cap_pp", & 1262 audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
1459 audit_log_cap(ab, "cap_pe", & 1263 audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
1460 audit_log_cap(ab, "cap_pa", & 1264 audit_log_cap(ab, "cap_pa", &context->capset.cap.ambient);
1461 break; 1265 break;
1462 case AUDIT_MMAP: 1266 case AUDIT_MMAP:
1463 audit_log_format(ab, "fd=%d f 1267 audit_log_format(ab, "fd=%d flags=0x%x", context->mmap.fd,
1464 context->mma 1268 context->mmap.flags);
1465 break; 1269 break;
1466 case AUDIT_OPENAT2: <<
1467 audit_log_format(ab, "oflag=0 <<
1468 context->ope <<
1469 context->ope <<
1470 context->ope <<
1471 break; <<
1472 case AUDIT_EXECVE: 1270 case AUDIT_EXECVE:
1473 audit_log_execve_info(context 1271 audit_log_execve_info(context, &ab);
1474 break; 1272 break;
1475 case AUDIT_KERN_MODULE: 1273 case AUDIT_KERN_MODULE:
1476 audit_log_format(ab, "name=") 1274 audit_log_format(ab, "name=");
1477 if (context->module.name) { !! 1275 audit_log_untrustedstring(ab, context->module.name);
1478 audit_log_untrustedst !! 1276 kfree(context->module.name);
1479 } else <<
1480 audit_log_format(ab, <<
1481 <<
1482 break; <<
1483 case AUDIT_TIME_ADJNTPVAL: <<
1484 case AUDIT_TIME_INJOFFSET: <<
1485 /* this call deviates from th <<
1486 audit_log_time(context, &ab); <<
1487 break; 1277 break;
1488 } 1278 }
1489 audit_log_end(ab); 1279 audit_log_end(ab);
1490 } 1280 }
1491 1281
1492 static inline int audit_proctitle_rtrim(char 1282 static inline int audit_proctitle_rtrim(char *proctitle, int len)
1493 { 1283 {
1494 char *end = proctitle + len - 1; 1284 char *end = proctitle + len - 1;
1495 <<
1496 while (end > proctitle && !isprint(*e 1285 while (end > proctitle && !isprint(*end))
1497 end--; 1286 end--;
1498 1287
1499 /* catch the case where proctitle is 1288 /* catch the case where proctitle is only 1 non-print character */
1500 len = end - proctitle + 1; 1289 len = end - proctitle + 1;
1501 len -= isprint(proctitle[len-1]) == 0 1290 len -= isprint(proctitle[len-1]) == 0;
1502 return len; 1291 return len;
1503 } 1292 }
1504 1293
1505 /* !! 1294 static void audit_log_proctitle(struct task_struct *tsk,
1506 * audit_log_name - produce AUDIT_PATH record !! 1295 struct audit_context *context)
1507 * @context: audit_context for the task <<
1508 * @n: audit_names structure with reportable <<
1509 * @path: optional path to report instead of <<
1510 * @record_num: record number to report when <<
1511 * @call_panic: optional pointer to int that <<
1512 */ <<
1513 static void audit_log_name(struct audit_conte <<
1514 const struct path *path, <<
1515 { <<
1516 struct audit_buffer *ab; <<
1517 <<
1518 ab = audit_log_start(context, GFP_KER <<
1519 if (!ab) <<
1520 return; <<
1521 <<
1522 audit_log_format(ab, "item=%d", recor <<
1523 <<
1524 if (path) <<
1525 audit_log_d_path(ab, " name=" <<
1526 else if (n->name) { <<
1527 switch (n->name_len) { <<
1528 case AUDIT_NAME_FULL: <<
1529 /* log the full path <<
1530 audit_log_format(ab, <<
1531 audit_log_untrustedst <<
1532 break; <<
1533 case 0: <<
1534 /* name was specified <<
1535 * directory componen <<
1536 */ <<
1537 if (context->pwd.dent <<
1538 audit_log_d_p <<
1539 else <<
1540 audit_log_for <<
1541 break; <<
1542 default: <<
1543 /* log the name's dir <<
1544 audit_log_format(ab, <<
1545 audit_log_n_untrusted <<
1546 <<
1547 } <<
1548 } else <<
1549 audit_log_format(ab, " name=( <<
1550 <<
1551 if (n->ino != AUDIT_INO_UNSET) <<
1552 audit_log_format(ab, " inode= <<
1553 n->ino, <<
1554 MAJOR(n->dev <<
1555 MINOR(n->dev <<
1556 n->mode, <<
1557 from_kuid(&i <<
1558 from_kgid(&i <<
1559 MAJOR(n->rde <<
1560 MINOR(n->rde <<
1561 if (n->osid != 0) { <<
1562 char *ctx = NULL; <<
1563 u32 len; <<
1564 <<
1565 if (security_secid_to_secctx( <<
1566 n->osid, &ctx, &len)) <<
1567 audit_log_format(ab, <<
1568 if (call_panic) <<
1569 *call_panic = <<
1570 } else { <<
1571 audit_log_format(ab, <<
1572 security_release_secc <<
1573 } <<
1574 } <<
1575 <<
1576 /* log the audit_names record type */ <<
1577 switch (n->type) { <<
1578 case AUDIT_TYPE_NORMAL: <<
1579 audit_log_format(ab, " namety <<
1580 break; <<
1581 case AUDIT_TYPE_PARENT: <<
1582 audit_log_format(ab, " namety <<
1583 break; <<
1584 case AUDIT_TYPE_CHILD_DELETE: <<
1585 audit_log_format(ab, " namety <<
1586 break; <<
1587 case AUDIT_TYPE_CHILD_CREATE: <<
1588 audit_log_format(ab, " namety <<
1589 break; <<
1590 default: <<
1591 audit_log_format(ab, " namety <<
1592 break; <<
1593 } <<
1594 <<
1595 audit_log_fcaps(ab, n); <<
1596 audit_log_end(ab); <<
1597 } <<
1598 <<
1599 static void audit_log_proctitle(void) <<
1600 { 1296 {
1601 int res; 1297 int res;
1602 char *buf; 1298 char *buf;
1603 char *msg = "(null)"; 1299 char *msg = "(null)";
1604 int len = strlen(msg); 1300 int len = strlen(msg);
1605 struct audit_context *context = audit <<
1606 struct audit_buffer *ab; 1301 struct audit_buffer *ab;
1607 1302
1608 ab = audit_log_start(context, GFP_KER 1303 ab = audit_log_start(context, GFP_KERNEL, AUDIT_PROCTITLE);
1609 if (!ab) 1304 if (!ab)
1610 return; /* audit_panic or bei 1305 return; /* audit_panic or being filtered */
1611 1306
1612 audit_log_format(ab, "proctitle="); 1307 audit_log_format(ab, "proctitle=");
1613 1308
1614 /* Not cached */ 1309 /* Not cached */
1615 if (!context->proctitle.value) { 1310 if (!context->proctitle.value) {
1616 buf = kmalloc(MAX_PROCTITLE_A 1311 buf = kmalloc(MAX_PROCTITLE_AUDIT_LEN, GFP_KERNEL);
1617 if (!buf) 1312 if (!buf)
1618 goto out; 1313 goto out;
1619 /* Historically called this f 1314 /* Historically called this from procfs naming */
1620 res = get_cmdline(current, bu !! 1315 res = get_cmdline(tsk, buf, MAX_PROCTITLE_AUDIT_LEN);
1621 if (res == 0) { 1316 if (res == 0) {
1622 kfree(buf); 1317 kfree(buf);
1623 goto out; 1318 goto out;
1624 } 1319 }
1625 res = audit_proctitle_rtrim(b 1320 res = audit_proctitle_rtrim(buf, res);
1626 if (res == 0) { 1321 if (res == 0) {
1627 kfree(buf); 1322 kfree(buf);
1628 goto out; 1323 goto out;
1629 } 1324 }
1630 context->proctitle.value = bu 1325 context->proctitle.value = buf;
1631 context->proctitle.len = res; 1326 context->proctitle.len = res;
1632 } 1327 }
1633 msg = context->proctitle.value; 1328 msg = context->proctitle.value;
1634 len = context->proctitle.len; 1329 len = context->proctitle.len;
1635 out: 1330 out:
1636 audit_log_n_untrustedstring(ab, msg, 1331 audit_log_n_untrustedstring(ab, msg, len);
1637 audit_log_end(ab); 1332 audit_log_end(ab);
1638 } 1333 }
1639 1334
1640 /** !! 1335 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
1641 * audit_log_uring - generate a AUDIT_URINGOP <<
1642 * @ctx: the audit context <<
1643 */ <<
1644 static void audit_log_uring(struct audit_cont <<
1645 { <<
1646 struct audit_buffer *ab; <<
1647 const struct cred *cred; <<
1648 <<
1649 ab = audit_log_start(ctx, GFP_ATOMIC, <<
1650 if (!ab) <<
1651 return; <<
1652 cred = current_cred(); <<
1653 audit_log_format(ab, "uring_op=%d", c <<
1654 if (ctx->return_valid != AUDITSC_INVA <<
1655 audit_log_format(ab, " succes <<
1656 (ctx->return <<
1657 "yes" : "no <<
1658 ctx->return_ <<
1659 audit_log_format(ab, <<
1660 " items=%d" <<
1661 " ppid=%d pid=%d uid <<
1662 " fsuid=%u egid=%u s <<
1663 ctx->name_count, <<
1664 task_ppid_nr(current <<
1665 from_kuid(&init_user <<
1666 from_kgid(&init_user <<
1667 from_kuid(&init_user <<
1668 from_kuid(&init_user <<
1669 from_kuid(&init_user <<
1670 from_kgid(&init_user <<
1671 from_kgid(&init_user <<
1672 from_kgid(&init_user <<
1673 audit_log_task_context(ab); <<
1674 audit_log_key(ab, ctx->filterkey); <<
1675 audit_log_end(ab); <<
1676 } <<
1677 <<
1678 static void audit_log_exit(void) <<
1679 { 1336 {
1680 int i, call_panic = 0; 1337 int i, call_panic = 0;
1681 struct audit_context *context = audit <<
1682 struct audit_buffer *ab; 1338 struct audit_buffer *ab;
1683 struct audit_aux_data *aux; 1339 struct audit_aux_data *aux;
1684 struct audit_names *n; 1340 struct audit_names *n;
1685 1341
1686 context->personality = current->perso !! 1342 /* tsk == current */
>> 1343 context->personality = tsk->personality;
1687 1344
1688 switch (context->context) { !! 1345 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
1689 case AUDIT_CTX_SYSCALL: !! 1346 if (!ab)
1690 ab = audit_log_start(context, !! 1347 return; /* audit_panic has been called */
1691 if (!ab) !! 1348 audit_log_format(ab, "arch=%x syscall=%d",
1692 return; !! 1349 context->arch, context->major);
1693 audit_log_format(ab, "arch=%x !! 1350 if (context->personality != PER_LINUX)
1694 context->arc !! 1351 audit_log_format(ab, " per=%lx", context->personality);
1695 if (context->personality != P !! 1352 if (context->return_valid)
1696 audit_log_format(ab, !! 1353 audit_log_format(ab, " success=%s exit=%ld",
1697 if (context->return_valid != !! 1354 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
1698 audit_log_format(ab, !! 1355 context->return_code);
1699 (con !! 1356
1700 "ye !! 1357 audit_log_format(ab,
1701 cont !! 1358 " a0=%lx a1=%lx a2=%lx a3=%lx items=%d",
1702 audit_log_format(ab, !! 1359 context->argv[0],
1703 " a0=%lx a1= !! 1360 context->argv[1],
1704 context->arg !! 1361 context->argv[2],
1705 context->arg !! 1362 context->argv[3],
1706 context->arg !! 1363 context->name_count);
1707 context->arg !! 1364
1708 context->nam !! 1365 audit_log_task_info(ab, tsk);
1709 audit_log_task_info(ab); !! 1366 audit_log_key(ab, context->filterkey);
1710 audit_log_key(ab, context->fi !! 1367 audit_log_end(ab);
1711 audit_log_end(ab); <<
1712 break; <<
1713 case AUDIT_CTX_URING: <<
1714 audit_log_uring(context); <<
1715 break; <<
1716 default: <<
1717 BUG(); <<
1718 break; <<
1719 } <<
1720 1368
1721 for (aux = context->aux; aux; aux = a 1369 for (aux = context->aux; aux; aux = aux->next) {
1722 1370
1723 ab = audit_log_start(context, 1371 ab = audit_log_start(context, GFP_KERNEL, aux->type);
1724 if (!ab) 1372 if (!ab)
1725 continue; /* audit_pa 1373 continue; /* audit_panic has been called */
1726 1374
1727 switch (aux->type) { 1375 switch (aux->type) {
1728 1376
1729 case AUDIT_BPRM_FCAPS: { 1377 case AUDIT_BPRM_FCAPS: {
1730 struct audit_aux_data 1378 struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
1731 <<
1732 audit_log_format(ab, 1379 audit_log_format(ab, "fver=%x", axs->fcap_ver);
1733 audit_log_cap(ab, "fp 1380 audit_log_cap(ab, "fp", &axs->fcap.permitted);
1734 audit_log_cap(ab, "fi 1381 audit_log_cap(ab, "fi", &axs->fcap.inheritable);
1735 audit_log_format(ab, 1382 audit_log_format(ab, " fe=%d", axs->fcap.fE);
1736 audit_log_cap(ab, "ol 1383 audit_log_cap(ab, "old_pp", &axs->old_pcap.permitted);
1737 audit_log_cap(ab, "ol 1384 audit_log_cap(ab, "old_pi", &axs->old_pcap.inheritable);
1738 audit_log_cap(ab, "ol 1385 audit_log_cap(ab, "old_pe", &axs->old_pcap.effective);
1739 audit_log_cap(ab, "ol 1386 audit_log_cap(ab, "old_pa", &axs->old_pcap.ambient);
1740 audit_log_cap(ab, "pp 1387 audit_log_cap(ab, "pp", &axs->new_pcap.permitted);
1741 audit_log_cap(ab, "pi 1388 audit_log_cap(ab, "pi", &axs->new_pcap.inheritable);
1742 audit_log_cap(ab, "pe 1389 audit_log_cap(ab, "pe", &axs->new_pcap.effective);
1743 audit_log_cap(ab, "pa 1390 audit_log_cap(ab, "pa", &axs->new_pcap.ambient);
1744 audit_log_format(ab, <<
1745 from <<
1746 <<
1747 break; } 1391 break; }
1748 1392
1749 } 1393 }
1750 audit_log_end(ab); 1394 audit_log_end(ab);
1751 } 1395 }
1752 1396
1753 if (context->type) 1397 if (context->type)
1754 show_special(context, &call_p 1398 show_special(context, &call_panic);
1755 1399
1756 if (context->fds[0] >= 0) { 1400 if (context->fds[0] >= 0) {
1757 ab = audit_log_start(context, 1401 ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
1758 if (ab) { 1402 if (ab) {
1759 audit_log_format(ab, 1403 audit_log_format(ab, "fd0=%d fd1=%d",
1760 conte 1404 context->fds[0], context->fds[1]);
1761 audit_log_end(ab); 1405 audit_log_end(ab);
1762 } 1406 }
1763 } 1407 }
1764 1408
1765 if (context->sockaddr_len) { 1409 if (context->sockaddr_len) {
1766 ab = audit_log_start(context, 1410 ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
1767 if (ab) { 1411 if (ab) {
1768 audit_log_format(ab, 1412 audit_log_format(ab, "saddr=");
1769 audit_log_n_hex(ab, ( 1413 audit_log_n_hex(ab, (void *)context->sockaddr,
1770 conte 1414 context->sockaddr_len);
1771 audit_log_end(ab); 1415 audit_log_end(ab);
1772 } 1416 }
1773 } 1417 }
1774 1418
1775 for (aux = context->aux_pids; aux; au 1419 for (aux = context->aux_pids; aux; aux = aux->next) {
1776 struct audit_aux_data_pids *a 1420 struct audit_aux_data_pids *axs = (void *)aux;
1777 1421
1778 for (i = 0; i < axs->pid_coun 1422 for (i = 0; i < axs->pid_count; i++)
1779 if (audit_log_pid_con 1423 if (audit_log_pid_context(context, axs->target_pid[i],
1780 1424 axs->target_auid[i],
1781 1425 axs->target_uid[i],
1782 1426 axs->target_sessionid[i],
1783 1427 axs->target_sid[i],
1784 1428 axs->target_comm[i]))
1785 call_panic = 1429 call_panic = 1;
1786 } 1430 }
1787 1431
1788 if (context->target_pid && 1432 if (context->target_pid &&
1789 audit_log_pid_context(context, co 1433 audit_log_pid_context(context, context->target_pid,
1790 context->ta 1434 context->target_auid, context->target_uid,
1791 context->ta 1435 context->target_sessionid,
1792 context->ta 1436 context->target_sid, context->target_comm))
1793 call_panic = 1; 1437 call_panic = 1;
1794 1438
1795 if (context->pwd.dentry && context->p 1439 if (context->pwd.dentry && context->pwd.mnt) {
1796 ab = audit_log_start(context, 1440 ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
1797 if (ab) { 1441 if (ab) {
1798 audit_log_d_path(ab, 1442 audit_log_d_path(ab, "cwd=", &context->pwd);
1799 audit_log_end(ab); 1443 audit_log_end(ab);
1800 } 1444 }
1801 } 1445 }
1802 1446
1803 i = 0; 1447 i = 0;
1804 list_for_each_entry(n, &context->name 1448 list_for_each_entry(n, &context->names_list, list) {
1805 if (n->hidden) 1449 if (n->hidden)
1806 continue; 1450 continue;
1807 audit_log_name(context, n, NU 1451 audit_log_name(context, n, NULL, i++, &call_panic);
1808 } 1452 }
1809 1453
1810 if (context->context == AUDIT_CTX_SYS !! 1454 audit_log_proctitle(tsk, context);
1811 audit_log_proctitle(); <<
1812 1455
1813 /* Send end of event record to help u 1456 /* Send end of event record to help user space know we are finished */
1814 ab = audit_log_start(context, GFP_KER 1457 ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
1815 if (ab) 1458 if (ab)
1816 audit_log_end(ab); 1459 audit_log_end(ab);
1817 if (call_panic) 1460 if (call_panic)
1818 audit_panic("error in audit_l !! 1461 audit_panic("error converting sid to string");
1819 } 1462 }
1820 1463
1821 /** 1464 /**
1822 * __audit_free - free a per-task audit conte 1465 * __audit_free - free a per-task audit context
1823 * @tsk: task whose audit context block to fr 1466 * @tsk: task whose audit context block to free
1824 * 1467 *
1825 * Called from copy_process, do_exit, and the !! 1468 * Called from copy_process and do_exit
1826 */ 1469 */
1827 void __audit_free(struct task_struct *tsk) 1470 void __audit_free(struct task_struct *tsk)
1828 { 1471 {
1829 struct audit_context *context = tsk-> !! 1472 struct audit_context *context;
1830 1473
>> 1474 context = audit_take_context(tsk, 0, 0);
1831 if (!context) 1475 if (!context)
1832 return; 1476 return;
1833 1477
1834 /* this may generate CONFIG_CHANGE re !! 1478 /* Check for system calls that do not go through the exit
>> 1479 * function (e.g., exit_group), then free context block.
>> 1480 * We use GFP_ATOMIC here because we might be doing this
>> 1481 * in the context of the idle thread */
>> 1482 /* that can happen only if we are called from do_exit() */
>> 1483 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
>> 1484 audit_log_exit(context, tsk);
1835 if (!list_empty(&context->killed_tree 1485 if (!list_empty(&context->killed_trees))
1836 audit_kill_trees(context); !! 1486 audit_kill_trees(&context->killed_trees);
1837 <<
1838 /* We are called either by do_exit() <<
1839 * in the former case tsk == current <<
1840 * random task_struct that doesn't ha <<
1841 * need to log via audit_log_exit(). <<
1842 */ <<
1843 if (tsk == current && !context->dummy <<
1844 context->return_valid = AUDIT <<
1845 context->return_code = 0; <<
1846 if (context->context == AUDIT <<
1847 audit_filter_syscall( <<
1848 audit_filter_inodes(t <<
1849 if (context->current_ <<
1850 audit_log_exi <<
1851 } else if (context->context = <<
1852 /* TODO: verify this <<
1853 audit_filter_uring(ts <<
1854 audit_filter_inodes(t <<
1855 if (context->current_ <<
1856 audit_log_uri <<
1857 } <<
1858 } <<
1859 1487
1860 audit_set_context(tsk, NULL); <<
1861 audit_free_context(context); 1488 audit_free_context(context);
1862 } 1489 }
1863 1490
1864 /** 1491 /**
1865 * audit_return_fixup - fixup the return code <<
1866 * @ctx: the audit_context <<
1867 * @success: true/false value to indicate if <<
1868 * @code: operation return code <<
1869 * <<
1870 * We need to fixup the return code in the au <<
1871 * codes are later going to be fixed by the a <<
1872 */ <<
1873 static void audit_return_fixup(struct audit_c <<
1874 int success, l <<
1875 { <<
1876 /* <<
1877 * This is actually a test for: <<
1878 * (rc == ERESTARTSYS ) || (rc == ERE <<
1879 * (rc == ERESTARTNOHAND) || (rc == E <<
1880 * <<
1881 * but is faster than a bunch of || <<
1882 */ <<
1883 if (unlikely(code <= -ERESTARTSYS) && <<
1884 (code >= -ERESTART_RESTARTBLOCK) <<
1885 (code != -ENOIOCTLCMD)) <<
1886 ctx->return_code = -EINTR; <<
1887 else <<
1888 ctx->return_code = code; <<
1889 ctx->return_valid = (success ? AUDITS <<
1890 } <<
1891 <<
1892 /** <<
1893 * __audit_uring_entry - prepare the kernel t <<
1894 * @op: the io_uring opcode <<
1895 * <<
1896 * This is similar to audit_syscall_entry() b <<
1897 * operations. This function should only eve <<
1898 * audit_uring_entry() as we rely on the audi <<
1899 * function. <<
1900 */ <<
1901 void __audit_uring_entry(u8 op) <<
1902 { <<
1903 struct audit_context *ctx = audit_con <<
1904 <<
1905 if (ctx->state == AUDIT_STATE_DISABLE <<
1906 return; <<
1907 <<
1908 /* <<
1909 * NOTE: It's possible that we can be <<
1910 * before it returns to userspa <<
1911 * is called. In this case the <<
1912 * the io_uring details and ret <<
1913 */ <<
1914 ctx->uring_op = op; <<
1915 if (ctx->context == AUDIT_CTX_SYSCALL <<
1916 return; <<
1917 <<
1918 ctx->dummy = !audit_n_rules; <<
1919 if (!ctx->dummy && ctx->state == AUDI <<
1920 ctx->prio = 0; <<
1921 <<
1922 ctx->context = AUDIT_CTX_URING; <<
1923 ctx->current_state = ctx->state; <<
1924 ktime_get_coarse_real_ts64(&ctx->ctim <<
1925 } <<
1926 <<
1927 /** <<
1928 * __audit_uring_exit - wrap up the kernel ta <<
1929 * @success: true/false value to indicate if <<
1930 * @code: operation return code <<
1931 * <<
1932 * This is similar to audit_syscall_exit() bu <<
1933 * operations. This function should only eve <<
1934 * audit_uring_exit() as we rely on the audit <<
1935 * function. <<
1936 */ <<
1937 void __audit_uring_exit(int success, long cod <<
1938 { <<
1939 struct audit_context *ctx = audit_con <<
1940 <<
1941 if (ctx->dummy) { <<
1942 if (ctx->context != AUDIT_CTX <<
1943 return; <<
1944 goto out; <<
1945 } <<
1946 <<
1947 audit_return_fixup(ctx, success, code <<
1948 if (ctx->context == AUDIT_CTX_SYSCALL <<
1949 /* <<
1950 * NOTE: See the note in __au <<
1951 * where we may be call <<
1952 * return to userspace <<
1953 * case we simply emit <<
1954 * normal syscall exit <<
1955 * everything else. <<
1956 * It is also worth men <<
1957 * the current process <<
1958 * used during the norm <<
1959 * in mind if/when we m <<
1960 */ <<
1961 <<
1962 /* <<
1963 * We need to filter on the s <<
1964 * should emit a URINGOP reco <<
1965 * solves the problem where u <<
1966 * syscall records in the "ex <<
1967 * the behavior here. <<
1968 */ <<
1969 audit_filter_syscall(current, <<
1970 if (ctx->current_state != AUD <<
1971 audit_filter_uring(cu <<
1972 audit_filter_inodes(current, <<
1973 if (ctx->current_state != AUD <<
1974 return; <<
1975 <<
1976 audit_log_uring(ctx); <<
1977 return; <<
1978 } <<
1979 <<
1980 /* this may generate CONFIG_CHANGE re <<
1981 if (!list_empty(&ctx->killed_trees)) <<
1982 audit_kill_trees(ctx); <<
1983 <<
1984 /* run through both filters to ensure <<
1985 audit_filter_uring(current, ctx); <<
1986 audit_filter_inodes(current, ctx); <<
1987 if (ctx->current_state != AUDIT_STATE <<
1988 goto out; <<
1989 audit_log_exit(); <<
1990 <<
1991 out: <<
1992 audit_reset_context(ctx); <<
1993 } <<
1994 <<
1995 /** <<
1996 * __audit_syscall_entry - fill in an audit r 1492 * __audit_syscall_entry - fill in an audit record at syscall entry
1997 * @major: major syscall type (function) 1493 * @major: major syscall type (function)
1998 * @a1: additional syscall register 1 1494 * @a1: additional syscall register 1
1999 * @a2: additional syscall register 2 1495 * @a2: additional syscall register 2
2000 * @a3: additional syscall register 3 1496 * @a3: additional syscall register 3
2001 * @a4: additional syscall register 4 1497 * @a4: additional syscall register 4
2002 * 1498 *
2003 * Fill in audit context at syscall entry. T 1499 * Fill in audit context at syscall entry. This only happens if the
2004 * audit context was created when the task wa 1500 * audit context was created when the task was created and the state or
2005 * filters demand the audit context be built. 1501 * filters demand the audit context be built. If the state from the
2006 * per-task filter or from the per-syscall fi !! 1502 * per-task filter or from the per-syscall filter is AUDIT_RECORD_CONTEXT,
2007 * then the record will be written at syscall 1503 * then the record will be written at syscall exit time (otherwise, it
2008 * will only be written if another part of th 1504 * will only be written if another part of the kernel requests that it
2009 * be written). 1505 * be written).
2010 */ 1506 */
2011 void __audit_syscall_entry(int major, unsigne 1507 void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
2012 unsigned long a3, 1508 unsigned long a3, unsigned long a4)
2013 { 1509 {
2014 struct audit_context *context = audit !! 1510 struct task_struct *tsk = current;
>> 1511 struct audit_context *context = tsk->audit_context;
2015 enum audit_state state; 1512 enum audit_state state;
2016 1513
2017 if (!audit_enabled || !context) !! 1514 if (!context)
2018 return; 1515 return;
2019 1516
2020 WARN_ON(context->context != AUDIT_CTX !! 1517 BUG_ON(context->in_syscall || context->name_count);
2021 WARN_ON(context->name_count); <<
2022 if (context->context != AUDIT_CTX_UNU <<
2023 audit_panic("unrecoverable er <<
2024 return; <<
2025 } <<
2026 1518
2027 state = context->state; !! 1519 if (!audit_enabled)
2028 if (state == AUDIT_STATE_DISABLED) <<
2029 return; 1520 return;
2030 1521
2031 context->dummy = !audit_n_rules; !! 1522 context->arch = syscall_get_arch();
2032 if (!context->dummy && state == AUDIT <<
2033 context->prio = 0; <<
2034 if (auditd_test_task(current) <<
2035 return; <<
2036 } <<
2037 <<
2038 context->arch = syscall_get_arc <<
2039 context->major = major; 1523 context->major = major;
2040 context->argv[0] = a1; 1524 context->argv[0] = a1;
2041 context->argv[1] = a2; 1525 context->argv[1] = a2;
2042 context->argv[2] = a3; 1526 context->argv[2] = a3;
2043 context->argv[3] = a4; 1527 context->argv[3] = a4;
2044 context->context = AUDIT_CTX_SYSCALL; !! 1528
>> 1529 state = context->state;
>> 1530 context->dummy = !audit_n_rules;
>> 1531 if (!context->dummy && state == AUDIT_BUILD_CONTEXT) {
>> 1532 context->prio = 0;
>> 1533 state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
>> 1534 }
>> 1535 if (state == AUDIT_DISABLED)
>> 1536 return;
>> 1537
>> 1538 context->serial = 0;
>> 1539 context->ctime = current_kernel_time64();
>> 1540 context->in_syscall = 1;
2045 context->current_state = state; 1541 context->current_state = state;
2046 ktime_get_coarse_real_ts64(&context-> !! 1542 context->ppid = 0;
2047 } 1543 }
2048 1544
2049 /** 1545 /**
2050 * __audit_syscall_exit - deallocate audit co 1546 * __audit_syscall_exit - deallocate audit context after a system call
2051 * @success: success value of the syscall 1547 * @success: success value of the syscall
2052 * @return_code: return value of the syscall 1548 * @return_code: return value of the syscall
2053 * 1549 *
2054 * Tear down after system call. If the audit 1550 * Tear down after system call. If the audit context has been marked as
2055 * auditable (either because of the AUDIT_STA !! 1551 * auditable (either because of the AUDIT_RECORD_CONTEXT state from
2056 * filtering, or because some other part of t 1552 * filtering, or because some other part of the kernel wrote an audit
2057 * message), then write out the syscall infor 1553 * message), then write out the syscall information. In call cases,
2058 * free the names stored from getname(). 1554 * free the names stored from getname().
2059 */ 1555 */
2060 void __audit_syscall_exit(int success, long r 1556 void __audit_syscall_exit(int success, long return_code)
2061 { 1557 {
2062 struct audit_context *context = audit !! 1558 struct task_struct *tsk = current;
>> 1559 struct audit_context *context;
2063 1560
2064 if (!context || context->dummy || !! 1561 if (success)
2065 context->context != AUDIT_CTX_SYS !! 1562 success = AUDITSC_SUCCESS;
2066 goto out; !! 1563 else
>> 1564 success = AUDITSC_FAILURE;
2067 1565
2068 /* this may generate CONFIG_CHANGE re !! 1566 context = audit_take_context(tsk, success, return_code);
2069 if (!list_empty(&context->killed_tree !! 1567 if (!context)
2070 audit_kill_trees(context); !! 1568 return;
2071 1569
2072 audit_return_fixup(context, success, !! 1570 if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
2073 /* run through both filters to ensure !! 1571 audit_log_exit(context, tsk);
2074 audit_filter_syscall(current, context <<
2075 audit_filter_inodes(current, context) <<
2076 if (context->current_state != AUDIT_S <<
2077 goto out; <<
2078 1572
2079 audit_log_exit(); !! 1573 context->in_syscall = 0;
>> 1574 context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
2080 1575
2081 out: !! 1576 if (!list_empty(&context->killed_trees))
2082 audit_reset_context(context); !! 1577 audit_kill_trees(&context->killed_trees);
>> 1578
>> 1579 audit_free_names(context);
>> 1580 unroll_tree_refs(context, NULL, 0);
>> 1581 audit_free_aux(context);
>> 1582 context->aux = NULL;
>> 1583 context->aux_pids = NULL;
>> 1584 context->target_pid = 0;
>> 1585 context->target_sid = 0;
>> 1586 context->sockaddr_len = 0;
>> 1587 context->type = 0;
>> 1588 context->fds[0] = -1;
>> 1589 if (context->state != AUDIT_RECORD_CONTEXT) {
>> 1590 kfree(context->filterkey);
>> 1591 context->filterkey = NULL;
>> 1592 }
>> 1593 tsk->audit_context = context;
2083 } 1594 }
2084 1595
2085 static inline void handle_one(const struct in 1596 static inline void handle_one(const struct inode *inode)
2086 { 1597 {
>> 1598 #ifdef CONFIG_AUDIT_TREE
2087 struct audit_context *context; 1599 struct audit_context *context;
2088 struct audit_tree_refs *p; 1600 struct audit_tree_refs *p;
2089 struct audit_chunk *chunk; 1601 struct audit_chunk *chunk;
2090 int count; 1602 int count;
2091 <<
2092 if (likely(!inode->i_fsnotify_marks)) 1603 if (likely(!inode->i_fsnotify_marks))
2093 return; 1604 return;
2094 context = audit_context(); !! 1605 context = current->audit_context;
2095 p = context->trees; 1606 p = context->trees;
2096 count = context->tree_count; 1607 count = context->tree_count;
2097 rcu_read_lock(); 1608 rcu_read_lock();
2098 chunk = audit_tree_lookup(inode); 1609 chunk = audit_tree_lookup(inode);
2099 rcu_read_unlock(); 1610 rcu_read_unlock();
2100 if (!chunk) 1611 if (!chunk)
2101 return; 1612 return;
2102 if (likely(put_tree_ref(context, chun 1613 if (likely(put_tree_ref(context, chunk)))
2103 return; 1614 return;
2104 if (unlikely(!grow_tree_refs(context) 1615 if (unlikely(!grow_tree_refs(context))) {
2105 pr_warn("out of memory, audit 1616 pr_warn("out of memory, audit has lost a tree reference\n");
2106 audit_set_auditable(context); 1617 audit_set_auditable(context);
2107 audit_put_chunk(chunk); 1618 audit_put_chunk(chunk);
2108 unroll_tree_refs(context, p, 1619 unroll_tree_refs(context, p, count);
2109 return; 1620 return;
2110 } 1621 }
2111 put_tree_ref(context, chunk); 1622 put_tree_ref(context, chunk);
>> 1623 #endif
2112 } 1624 }
2113 1625
2114 static void handle_path(const struct dentry * 1626 static void handle_path(const struct dentry *dentry)
2115 { 1627 {
>> 1628 #ifdef CONFIG_AUDIT_TREE
2116 struct audit_context *context; 1629 struct audit_context *context;
2117 struct audit_tree_refs *p; 1630 struct audit_tree_refs *p;
2118 const struct dentry *d, *parent; 1631 const struct dentry *d, *parent;
2119 struct audit_chunk *drop; 1632 struct audit_chunk *drop;
2120 unsigned long seq; 1633 unsigned long seq;
2121 int count; 1634 int count;
2122 1635
2123 context = audit_context(); !! 1636 context = current->audit_context;
2124 p = context->trees; 1637 p = context->trees;
2125 count = context->tree_count; 1638 count = context->tree_count;
2126 retry: 1639 retry:
2127 drop = NULL; 1640 drop = NULL;
2128 d = dentry; 1641 d = dentry;
2129 rcu_read_lock(); 1642 rcu_read_lock();
2130 seq = read_seqbegin(&rename_lock); 1643 seq = read_seqbegin(&rename_lock);
2131 for (;;) { !! 1644 for(;;) {
2132 struct inode *inode = d_backi 1645 struct inode *inode = d_backing_inode(d);
2133 <<
2134 if (inode && unlikely(inode-> 1646 if (inode && unlikely(inode->i_fsnotify_marks)) {
2135 struct audit_chunk *c 1647 struct audit_chunk *chunk;
2136 <<
2137 chunk = audit_tree_lo 1648 chunk = audit_tree_lookup(inode);
2138 if (chunk) { 1649 if (chunk) {
2139 if (unlikely( 1650 if (unlikely(!put_tree_ref(context, chunk))) {
2140 drop 1651 drop = chunk;
2141 break 1652 break;
2142 } 1653 }
2143 } 1654 }
2144 } 1655 }
2145 parent = d->d_parent; 1656 parent = d->d_parent;
2146 if (parent == d) 1657 if (parent == d)
2147 break; 1658 break;
2148 d = parent; 1659 d = parent;
2149 } 1660 }
2150 if (unlikely(read_seqretry(&rename_lo 1661 if (unlikely(read_seqretry(&rename_lock, seq) || drop)) { /* in this order */
2151 rcu_read_unlock(); 1662 rcu_read_unlock();
2152 if (!drop) { 1663 if (!drop) {
2153 /* just a race with r 1664 /* just a race with rename */
2154 unroll_tree_refs(cont 1665 unroll_tree_refs(context, p, count);
2155 goto retry; 1666 goto retry;
2156 } 1667 }
2157 audit_put_chunk(drop); 1668 audit_put_chunk(drop);
2158 if (grow_tree_refs(context)) 1669 if (grow_tree_refs(context)) {
2159 /* OK, got more space 1670 /* OK, got more space */
2160 unroll_tree_refs(cont 1671 unroll_tree_refs(context, p, count);
2161 goto retry; 1672 goto retry;
2162 } 1673 }
2163 /* too bad */ 1674 /* too bad */
2164 pr_warn("out of memory, audit 1675 pr_warn("out of memory, audit has lost a tree reference\n");
2165 unroll_tree_refs(context, p, 1676 unroll_tree_refs(context, p, count);
2166 audit_set_auditable(context); 1677 audit_set_auditable(context);
2167 return; 1678 return;
2168 } 1679 }
2169 rcu_read_unlock(); 1680 rcu_read_unlock();
>> 1681 #endif
2170 } 1682 }
2171 1683
2172 static struct audit_names *audit_alloc_name(s 1684 static struct audit_names *audit_alloc_name(struct audit_context *context,
2173 1685 unsigned char type)
2174 { 1686 {
2175 struct audit_names *aname; 1687 struct audit_names *aname;
2176 1688
2177 if (context->name_count < AUDIT_NAMES 1689 if (context->name_count < AUDIT_NAMES) {
2178 aname = &context->preallocate 1690 aname = &context->preallocated_names[context->name_count];
2179 memset(aname, 0, sizeof(*anam 1691 memset(aname, 0, sizeof(*aname));
2180 } else { 1692 } else {
2181 aname = kzalloc(sizeof(*aname 1693 aname = kzalloc(sizeof(*aname), GFP_NOFS);
2182 if (!aname) 1694 if (!aname)
2183 return NULL; 1695 return NULL;
2184 aname->should_free = true; 1696 aname->should_free = true;
2185 } 1697 }
2186 1698
2187 aname->ino = AUDIT_INO_UNSET; 1699 aname->ino = AUDIT_INO_UNSET;
2188 aname->type = type; 1700 aname->type = type;
2189 list_add_tail(&aname->list, &context- 1701 list_add_tail(&aname->list, &context->names_list);
2190 1702
2191 context->name_count++; 1703 context->name_count++;
2192 if (!context->pwd.dentry) <<
2193 get_fs_pwd(current->fs, &cont <<
2194 return aname; 1704 return aname;
2195 } 1705 }
2196 1706
2197 /** 1707 /**
2198 * __audit_reusename - fill out filename with 1708 * __audit_reusename - fill out filename with info from existing entry
2199 * @uptr: userland ptr to pathname 1709 * @uptr: userland ptr to pathname
2200 * 1710 *
2201 * Search the audit_names list for the curren 1711 * Search the audit_names list for the current audit context. If there is an
2202 * existing entry with a matching "uptr" then 1712 * existing entry with a matching "uptr" then return the filename
2203 * associated with that audit_name. If not, r 1713 * associated with that audit_name. If not, return NULL.
2204 */ 1714 */
2205 struct filename * 1715 struct filename *
2206 __audit_reusename(const __user char *uptr) 1716 __audit_reusename(const __user char *uptr)
2207 { 1717 {
2208 struct audit_context *context = audit !! 1718 struct audit_context *context = current->audit_context;
2209 struct audit_names *n; 1719 struct audit_names *n;
2210 1720
2211 list_for_each_entry(n, &context->name 1721 list_for_each_entry(n, &context->names_list, list) {
2212 if (!n->name) 1722 if (!n->name)
2213 continue; 1723 continue;
2214 if (n->name->uptr == uptr) { 1724 if (n->name->uptr == uptr) {
2215 atomic_inc(&n->name-> !! 1725 n->name->refcnt++;
2216 return n->name; 1726 return n->name;
2217 } 1727 }
2218 } 1728 }
2219 return NULL; 1729 return NULL;
2220 } 1730 }
2221 1731
2222 /** 1732 /**
2223 * __audit_getname - add a name to the list 1733 * __audit_getname - add a name to the list
2224 * @name: name to add 1734 * @name: name to add
2225 * 1735 *
2226 * Add a name to the list of audit names for 1736 * Add a name to the list of audit names for this context.
2227 * Called from fs/namei.c:getname(). 1737 * Called from fs/namei.c:getname().
2228 */ 1738 */
2229 void __audit_getname(struct filename *name) 1739 void __audit_getname(struct filename *name)
2230 { 1740 {
2231 struct audit_context *context = audit !! 1741 struct audit_context *context = current->audit_context;
2232 struct audit_names *n; 1742 struct audit_names *n;
2233 1743
2234 if (context->context == AUDIT_CTX_UNU !! 1744 if (!context->in_syscall)
2235 return; 1745 return;
2236 1746
2237 n = audit_alloc_name(context, AUDIT_T 1747 n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
2238 if (!n) 1748 if (!n)
2239 return; 1749 return;
2240 1750
2241 n->name = name; 1751 n->name = name;
2242 n->name_len = AUDIT_NAME_FULL; 1752 n->name_len = AUDIT_NAME_FULL;
2243 name->aname = n; 1753 name->aname = n;
2244 atomic_inc(&name->refcnt); !! 1754 name->refcnt++;
2245 } <<
2246 1755
2247 static inline int audit_copy_fcaps(struct aud !! 1756 if (!context->pwd.dentry)
2248 const stru !! 1757 get_fs_pwd(current->fs, &context->pwd);
2249 { <<
2250 struct cpu_vfs_cap_data caps; <<
2251 int rc; <<
2252 <<
2253 if (!dentry) <<
2254 return 0; <<
2255 <<
2256 rc = get_vfs_caps_from_disk(&nop_mnt_ <<
2257 if (rc) <<
2258 return rc; <<
2259 <<
2260 name->fcap.permitted = caps.permitted <<
2261 name->fcap.inheritable = caps.inherit <<
2262 name->fcap.fE = !!(caps.magic_etc & V <<
2263 name->fcap.rootid = caps.rootid; <<
2264 name->fcap_ver = (caps.magic_etc & VF <<
2265 VFS_CAP_REVIS <<
2266 <<
2267 return 0; <<
2268 } <<
2269 <<
2270 /* Copy inode data into an audit_names. */ <<
2271 static void audit_copy_inode(struct audit_nam <<
2272 const struct den <<
2273 struct inode *in <<
2274 { <<
2275 name->ino = inode->i_ino; <<
2276 name->dev = inode->i_sb->s_dev; <<
2277 name->mode = inode->i_mode; <<
2278 name->uid = inode->i_uid; <<
2279 name->gid = inode->i_gid; <<
2280 name->rdev = inode->i_rdev; <<
2281 security_inode_getsecid(inode, &name- <<
2282 if (flags & AUDIT_INODE_NOEVAL) { <<
2283 name->fcap_ver = -1; <<
2284 return; <<
2285 } <<
2286 audit_copy_fcaps(name, dentry); <<
2287 } 1758 }
2288 1759
2289 /** 1760 /**
2290 * __audit_inode - store the inode and device 1761 * __audit_inode - store the inode and device from a lookup
2291 * @name: name being audited 1762 * @name: name being audited
2292 * @dentry: dentry being audited 1763 * @dentry: dentry being audited
2293 * @flags: attributes for this particular ent 1764 * @flags: attributes for this particular entry
2294 */ 1765 */
2295 void __audit_inode(struct filename *name, con 1766 void __audit_inode(struct filename *name, const struct dentry *dentry,
2296 unsigned int flags) 1767 unsigned int flags)
2297 { 1768 {
2298 struct audit_context *context = audit !! 1769 struct audit_context *context = current->audit_context;
2299 struct inode *inode = d_backing_inode 1770 struct inode *inode = d_backing_inode(dentry);
2300 struct audit_names *n; 1771 struct audit_names *n;
2301 bool parent = flags & AUDIT_INODE_PAR 1772 bool parent = flags & AUDIT_INODE_PARENT;
2302 struct audit_entry *e; <<
2303 struct list_head *list = &audit_filte <<
2304 int i; <<
2305 1773
2306 if (context->context == AUDIT_CTX_UNU !! 1774 if (!context->in_syscall)
2307 return; 1775 return;
2308 1776
2309 rcu_read_lock(); <<
2310 list_for_each_entry_rcu(e, list, list <<
2311 for (i = 0; i < e->rule.field <<
2312 struct audit_field *f <<
2313 <<
2314 if (f->type == AUDIT_ <<
2315 && audit_comparat <<
2316 <<
2317 && e->rule.action <<
2318 rcu_read_unlo <<
2319 return; <<
2320 } <<
2321 } <<
2322 } <<
2323 rcu_read_unlock(); <<
2324 <<
2325 if (!name) 1777 if (!name)
2326 goto out_alloc; 1778 goto out_alloc;
2327 1779
2328 /* 1780 /*
2329 * If we have a pointer to an audit_n 1781 * If we have a pointer to an audit_names entry already, then we can
2330 * just use it directly if the type i 1782 * just use it directly if the type is correct.
2331 */ 1783 */
2332 n = name->aname; 1784 n = name->aname;
2333 if (n) { 1785 if (n) {
2334 if (parent) { 1786 if (parent) {
2335 if (n->type == AUDIT_ 1787 if (n->type == AUDIT_TYPE_PARENT ||
2336 n->type == AUDIT_ 1788 n->type == AUDIT_TYPE_UNKNOWN)
2337 goto out; 1789 goto out;
2338 } else { 1790 } else {
2339 if (n->type != AUDIT_ 1791 if (n->type != AUDIT_TYPE_PARENT)
2340 goto out; 1792 goto out;
2341 } 1793 }
2342 } 1794 }
2343 1795
2344 list_for_each_entry_reverse(n, &conte 1796 list_for_each_entry_reverse(n, &context->names_list, list) {
2345 if (n->ino) { 1797 if (n->ino) {
2346 /* valid inode number 1798 /* valid inode number, use that for the comparison */
2347 if (n->ino != inode-> 1799 if (n->ino != inode->i_ino ||
2348 n->dev != inode-> 1800 n->dev != inode->i_sb->s_dev)
2349 continue; 1801 continue;
2350 } else if (n->name) { 1802 } else if (n->name) {
2351 /* inode number has n 1803 /* inode number has not been set, check the name */
2352 if (strcmp(n->name->n 1804 if (strcmp(n->name->name, name->name))
2353 continue; 1805 continue;
2354 } else 1806 } else
2355 /* no inode and no na 1807 /* no inode and no name (?!) ... this is odd ... */
2356 continue; 1808 continue;
2357 1809
2358 /* match the correct record t 1810 /* match the correct record type */
2359 if (parent) { 1811 if (parent) {
2360 if (n->type == AUDIT_ 1812 if (n->type == AUDIT_TYPE_PARENT ||
2361 n->type == AUDIT_ 1813 n->type == AUDIT_TYPE_UNKNOWN)
2362 goto out; 1814 goto out;
2363 } else { 1815 } else {
2364 if (n->type != AUDIT_ 1816 if (n->type != AUDIT_TYPE_PARENT)
2365 goto out; 1817 goto out;
2366 } 1818 }
2367 } 1819 }
2368 1820
2369 out_alloc: 1821 out_alloc:
2370 /* unable to find an entry with both 1822 /* unable to find an entry with both a matching name and type */
2371 n = audit_alloc_name(context, AUDIT_T 1823 n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
2372 if (!n) 1824 if (!n)
2373 return; 1825 return;
2374 if (name) { 1826 if (name) {
2375 n->name = name; 1827 n->name = name;
2376 atomic_inc(&name->refcnt); !! 1828 name->refcnt++;
2377 } 1829 }
2378 1830
2379 out: 1831 out:
2380 if (parent) { 1832 if (parent) {
2381 n->name_len = n->name ? paren 1833 n->name_len = n->name ? parent_len(n->name->name) : AUDIT_NAME_FULL;
2382 n->type = AUDIT_TYPE_PARENT; 1834 n->type = AUDIT_TYPE_PARENT;
2383 if (flags & AUDIT_INODE_HIDDE 1835 if (flags & AUDIT_INODE_HIDDEN)
2384 n->hidden = true; 1836 n->hidden = true;
2385 } else { 1837 } else {
2386 n->name_len = AUDIT_NAME_FULL 1838 n->name_len = AUDIT_NAME_FULL;
2387 n->type = AUDIT_TYPE_NORMAL; 1839 n->type = AUDIT_TYPE_NORMAL;
2388 } 1840 }
2389 handle_path(dentry); 1841 handle_path(dentry);
2390 audit_copy_inode(n, dentry, inode, fl !! 1842 audit_copy_inode(n, dentry, inode);
2391 } 1843 }
2392 1844
2393 void __audit_file(const struct file *file) 1845 void __audit_file(const struct file *file)
2394 { 1846 {
2395 __audit_inode(NULL, file->f_path.dent 1847 __audit_inode(NULL, file->f_path.dentry, 0);
2396 } 1848 }
2397 1849
2398 /** 1850 /**
2399 * __audit_inode_child - collect inode info f 1851 * __audit_inode_child - collect inode info for created/removed objects
2400 * @parent: inode of dentry parent 1852 * @parent: inode of dentry parent
2401 * @dentry: dentry being audited 1853 * @dentry: dentry being audited
2402 * @type: AUDIT_TYPE_* value that we're loo 1854 * @type: AUDIT_TYPE_* value that we're looking for
2403 * 1855 *
2404 * For syscalls that create or remove filesys 1856 * For syscalls that create or remove filesystem objects, audit_inode
2405 * can only collect information for the files 1857 * can only collect information for the filesystem object's parent.
2406 * This call updates the audit context with t 1858 * This call updates the audit context with the child's information.
2407 * Syscalls that create a new filesystem obje 1859 * Syscalls that create a new filesystem object must be hooked after
2408 * the object is created. Syscalls that remo 1860 * the object is created. Syscalls that remove a filesystem object
2409 * must be hooked prior, in order to capture 1861 * must be hooked prior, in order to capture the target inode during
2410 * unsuccessful attempts. 1862 * unsuccessful attempts.
2411 */ 1863 */
2412 void __audit_inode_child(struct inode *parent 1864 void __audit_inode_child(struct inode *parent,
2413 const struct dentry 1865 const struct dentry *dentry,
2414 const unsigned char 1866 const unsigned char type)
2415 { 1867 {
2416 struct audit_context *context = audit !! 1868 struct audit_context *context = current->audit_context;
2417 struct inode *inode = d_backing_inode 1869 struct inode *inode = d_backing_inode(dentry);
2418 const struct qstr *dname = &dentry->d !! 1870 const char *dname = dentry->d_name.name;
2419 struct audit_names *n, *found_parent 1871 struct audit_names *n, *found_parent = NULL, *found_child = NULL;
2420 struct audit_entry *e; 1872 struct audit_entry *e;
2421 struct list_head *list = &audit_filte 1873 struct list_head *list = &audit_filter_list[AUDIT_FILTER_FS];
2422 int i; 1874 int i;
2423 1875
2424 if (context->context == AUDIT_CTX_UNU !! 1876 if (!context->in_syscall)
2425 return; 1877 return;
2426 1878
2427 rcu_read_lock(); 1879 rcu_read_lock();
2428 list_for_each_entry_rcu(e, list, list !! 1880 if (!list_empty(list)) {
2429 for (i = 0; i < e->rule.field !! 1881 list_for_each_entry_rcu(e, list, list) {
2430 struct audit_field *f !! 1882 for (i = 0; i < e->rule.field_count; i++) {
2431 !! 1883 struct audit_field *f = &e->rule.fields[i];
2432 if (f->type == AUDIT_ !! 1884
2433 && audit_comparat !! 1885 if (f->type == AUDIT_FSTYPE) {
2434 !! 1886 if (audit_comparator(parent->i_sb->s_magic,
2435 && e->rule.action !! 1887 f->op, f->val)) {
2436 rcu_read_unlo !! 1888 if (e->rule.action == AUDIT_NEVER) {
2437 return; !! 1889 rcu_read_unlock();
>> 1890 return;
>> 1891 }
>> 1892 }
>> 1893 }
2438 } 1894 }
2439 } 1895 }
2440 } 1896 }
2441 rcu_read_unlock(); 1897 rcu_read_unlock();
2442 1898
2443 if (inode) 1899 if (inode)
2444 handle_one(inode); 1900 handle_one(inode);
2445 1901
2446 /* look for a parent entry first */ 1902 /* look for a parent entry first */
2447 list_for_each_entry(n, &context->name 1903 list_for_each_entry(n, &context->names_list, list) {
2448 if (!n->name || 1904 if (!n->name ||
2449 (n->type != AUDIT_TYPE_PA 1905 (n->type != AUDIT_TYPE_PARENT &&
2450 n->type != AUDIT_TYPE_UN 1906 n->type != AUDIT_TYPE_UNKNOWN))
2451 continue; 1907 continue;
2452 1908
2453 if (n->ino == parent->i_ino & 1909 if (n->ino == parent->i_ino && n->dev == parent->i_sb->s_dev &&
2454 !audit_compare_dname_path 1910 !audit_compare_dname_path(dname,
2455 1911 n->name->name, n->name_len)) {
2456 if (n->type == AUDIT_ 1912 if (n->type == AUDIT_TYPE_UNKNOWN)
2457 n->type = AUD 1913 n->type = AUDIT_TYPE_PARENT;
2458 found_parent = n; 1914 found_parent = n;
2459 break; 1915 break;
2460 } 1916 }
2461 } 1917 }
2462 1918
2463 cond_resched(); <<
2464 <<
2465 /* is there a matching child entry? * 1919 /* is there a matching child entry? */
2466 list_for_each_entry(n, &context->name 1920 list_for_each_entry(n, &context->names_list, list) {
2467 /* can only match entries tha 1921 /* can only match entries that have a name */
2468 if (!n->name || 1922 if (!n->name ||
2469 (n->type != type && n->ty 1923 (n->type != type && n->type != AUDIT_TYPE_UNKNOWN))
2470 continue; 1924 continue;
2471 1925
2472 if (!strcmp(dname->name, n->n !! 1926 if (!strcmp(dname, n->name->name) ||
2473 !audit_compare_dname_path 1927 !audit_compare_dname_path(dname, n->name->name,
2474 1928 found_parent ?
2475 1929 found_parent->name_len :
2476 1930 AUDIT_NAME_FULL)) {
2477 if (n->type == AUDIT_ 1931 if (n->type == AUDIT_TYPE_UNKNOWN)
2478 n->type = typ 1932 n->type = type;
2479 found_child = n; 1933 found_child = n;
2480 break; 1934 break;
2481 } 1935 }
2482 } 1936 }
2483 1937
2484 if (!found_parent) { 1938 if (!found_parent) {
2485 /* create a new, "anonymous" 1939 /* create a new, "anonymous" parent record */
2486 n = audit_alloc_name(context, 1940 n = audit_alloc_name(context, AUDIT_TYPE_PARENT);
2487 if (!n) 1941 if (!n)
2488 return; 1942 return;
2489 audit_copy_inode(n, NULL, par !! 1943 audit_copy_inode(n, NULL, parent);
2490 } 1944 }
2491 1945
2492 if (!found_child) { 1946 if (!found_child) {
2493 found_child = audit_alloc_nam 1947 found_child = audit_alloc_name(context, type);
2494 if (!found_child) 1948 if (!found_child)
2495 return; 1949 return;
2496 1950
2497 /* Re-use the name belonging 1951 /* Re-use the name belonging to the slot for a matching parent
2498 * directory. All names for t 1952 * directory. All names for this context are relinquished in
2499 * audit_free_names() */ 1953 * audit_free_names() */
2500 if (found_parent) { 1954 if (found_parent) {
2501 found_child->name = f 1955 found_child->name = found_parent->name;
2502 found_child->name_len 1956 found_child->name_len = AUDIT_NAME_FULL;
2503 atomic_inc(&found_chi !! 1957 found_child->name->refcnt++;
2504 } 1958 }
2505 } 1959 }
2506 1960
2507 if (inode) 1961 if (inode)
2508 audit_copy_inode(found_child, !! 1962 audit_copy_inode(found_child, dentry, inode);
2509 else 1963 else
2510 found_child->ino = AUDIT_INO_ 1964 found_child->ino = AUDIT_INO_UNSET;
2511 } 1965 }
2512 EXPORT_SYMBOL_GPL(__audit_inode_child); 1966 EXPORT_SYMBOL_GPL(__audit_inode_child);
2513 1967
2514 /** 1968 /**
2515 * auditsc_get_stamp - get local copies of au 1969 * auditsc_get_stamp - get local copies of audit_context values
2516 * @ctx: audit_context for the task 1970 * @ctx: audit_context for the task
2517 * @t: timespec64 to store time recorded in t 1971 * @t: timespec64 to store time recorded in the audit_context
2518 * @serial: serial value that is recorded in 1972 * @serial: serial value that is recorded in the audit_context
2519 * 1973 *
2520 * Also sets the context as auditable. 1974 * Also sets the context as auditable.
2521 */ 1975 */
2522 int auditsc_get_stamp(struct audit_context *c 1976 int auditsc_get_stamp(struct audit_context *ctx,
2523 struct timespec64 *t, 1977 struct timespec64 *t, unsigned int *serial)
2524 { 1978 {
2525 if (ctx->context == AUDIT_CTX_UNUSED) !! 1979 if (!ctx->in_syscall)
2526 return 0; 1980 return 0;
2527 if (!ctx->serial) 1981 if (!ctx->serial)
2528 ctx->serial = audit_serial(); 1982 ctx->serial = audit_serial();
2529 t->tv_sec = ctx->ctime.tv_sec; 1983 t->tv_sec = ctx->ctime.tv_sec;
2530 t->tv_nsec = ctx->ctime.tv_nsec; 1984 t->tv_nsec = ctx->ctime.tv_nsec;
2531 *serial = ctx->serial; 1985 *serial = ctx->serial;
2532 if (!ctx->prio) { 1986 if (!ctx->prio) {
2533 ctx->prio = 1; 1987 ctx->prio = 1;
2534 ctx->current_state = AUDIT_ST !! 1988 ctx->current_state = AUDIT_RECORD_CONTEXT;
2535 } 1989 }
2536 return 1; 1990 return 1;
2537 } 1991 }
2538 1992
>> 1993 /* global counter which is incremented every time something logs in */
>> 1994 static atomic_t session_id = ATOMIC_INIT(0);
>> 1995
>> 1996 static int audit_set_loginuid_perm(kuid_t loginuid)
>> 1997 {
>> 1998 /* if we are unset, we don't need privs */
>> 1999 if (!audit_loginuid_set(current))
>> 2000 return 0;
>> 2001 /* if AUDIT_FEATURE_LOGINUID_IMMUTABLE means never ever allow a change*/
>> 2002 if (is_audit_feature_set(AUDIT_FEATURE_LOGINUID_IMMUTABLE))
>> 2003 return -EPERM;
>> 2004 /* it is set, you need permission */
>> 2005 if (!capable(CAP_AUDIT_CONTROL))
>> 2006 return -EPERM;
>> 2007 /* reject if this is not an unset and we don't allow that */
>> 2008 if (is_audit_feature_set(AUDIT_FEATURE_ONLY_UNSET_LOGINUID) && uid_valid(loginuid))
>> 2009 return -EPERM;
>> 2010 return 0;
>> 2011 }
>> 2012
>> 2013 static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
>> 2014 unsigned int oldsessionid, unsigned int sessionid,
>> 2015 int rc)
>> 2016 {
>> 2017 struct audit_buffer *ab;
>> 2018 uid_t uid, oldloginuid, loginuid;
>> 2019 struct tty_struct *tty;
>> 2020
>> 2021 if (!audit_enabled)
>> 2022 return;
>> 2023
>> 2024 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
>> 2025 if (!ab)
>> 2026 return;
>> 2027
>> 2028 uid = from_kuid(&init_user_ns, task_uid(current));
>> 2029 oldloginuid = from_kuid(&init_user_ns, koldloginuid);
>> 2030 loginuid = from_kuid(&init_user_ns, kloginuid),
>> 2031 tty = audit_get_tty(current);
>> 2032
>> 2033 audit_log_format(ab, "pid=%d uid=%u", task_tgid_nr(current), uid);
>> 2034 audit_log_task_context(ab);
>> 2035 audit_log_format(ab, " old-auid=%u auid=%u tty=%s old-ses=%u ses=%u res=%d",
>> 2036 oldloginuid, loginuid, tty ? tty_name(tty) : "(none)",
>> 2037 oldsessionid, sessionid, !rc);
>> 2038 audit_put_tty(tty);
>> 2039 audit_log_end(ab);
>> 2040 }
>> 2041
>> 2042 /**
>> 2043 * audit_set_loginuid - set current task's audit_context loginuid
>> 2044 * @loginuid: loginuid value
>> 2045 *
>> 2046 * Returns 0.
>> 2047 *
>> 2048 * Called (set) from fs/proc/base.c::proc_loginuid_write().
>> 2049 */
>> 2050 int audit_set_loginuid(kuid_t loginuid)
>> 2051 {
>> 2052 struct task_struct *task = current;
>> 2053 unsigned int oldsessionid, sessionid = (unsigned int)-1;
>> 2054 kuid_t oldloginuid;
>> 2055 int rc;
>> 2056
>> 2057 oldloginuid = audit_get_loginuid(current);
>> 2058 oldsessionid = audit_get_sessionid(current);
>> 2059
>> 2060 rc = audit_set_loginuid_perm(loginuid);
>> 2061 if (rc)
>> 2062 goto out;
>> 2063
>> 2064 /* are we setting or clearing? */
>> 2065 if (uid_valid(loginuid)) {
>> 2066 sessionid = (unsigned int)atomic_inc_return(&session_id);
>> 2067 if (unlikely(sessionid == (unsigned int)-1))
>> 2068 sessionid = (unsigned int)atomic_inc_return(&session_id);
>> 2069 }
>> 2070
>> 2071 task->sessionid = sessionid;
>> 2072 task->loginuid = loginuid;
>> 2073 out:
>> 2074 audit_log_set_loginuid(oldloginuid, loginuid, oldsessionid, sessionid, rc);
>> 2075 return rc;
>> 2076 }
>> 2077
2539 /** 2078 /**
2540 * __audit_mq_open - record audit data for a 2079 * __audit_mq_open - record audit data for a POSIX MQ open
2541 * @oflag: open flag 2080 * @oflag: open flag
2542 * @mode: mode bits 2081 * @mode: mode bits
2543 * @attr: queue attributes 2082 * @attr: queue attributes
2544 * 2083 *
2545 */ 2084 */
2546 void __audit_mq_open(int oflag, umode_t mode, 2085 void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
2547 { 2086 {
2548 struct audit_context *context = audit !! 2087 struct audit_context *context = current->audit_context;
2549 2088
2550 if (attr) 2089 if (attr)
2551 memcpy(&context->mq_open.attr 2090 memcpy(&context->mq_open.attr, attr, sizeof(struct mq_attr));
2552 else 2091 else
2553 memset(&context->mq_open.attr 2092 memset(&context->mq_open.attr, 0, sizeof(struct mq_attr));
2554 2093
2555 context->mq_open.oflag = oflag; 2094 context->mq_open.oflag = oflag;
2556 context->mq_open.mode = mode; 2095 context->mq_open.mode = mode;
2557 2096
2558 context->type = AUDIT_MQ_OPEN; 2097 context->type = AUDIT_MQ_OPEN;
2559 } 2098 }
2560 2099
2561 /** 2100 /**
2562 * __audit_mq_sendrecv - record audit data fo 2101 * __audit_mq_sendrecv - record audit data for a POSIX MQ timed send/receive
2563 * @mqdes: MQ descriptor 2102 * @mqdes: MQ descriptor
2564 * @msg_len: Message length 2103 * @msg_len: Message length
2565 * @msg_prio: Message priority 2104 * @msg_prio: Message priority
2566 * @abs_timeout: Message timeout in absolute 2105 * @abs_timeout: Message timeout in absolute time
2567 * 2106 *
2568 */ 2107 */
2569 void __audit_mq_sendrecv(mqd_t mqdes, size_t 2108 void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
2570 const struct timespec 2109 const struct timespec64 *abs_timeout)
2571 { 2110 {
2572 struct audit_context *context = audit !! 2111 struct audit_context *context = current->audit_context;
2573 struct timespec64 *p = &context->mq_s 2112 struct timespec64 *p = &context->mq_sendrecv.abs_timeout;
2574 2113
2575 if (abs_timeout) 2114 if (abs_timeout)
2576 memcpy(p, abs_timeout, sizeof 2115 memcpy(p, abs_timeout, sizeof(*p));
2577 else 2116 else
2578 memset(p, 0, sizeof(*p)); 2117 memset(p, 0, sizeof(*p));
2579 2118
2580 context->mq_sendrecv.mqdes = mqdes; 2119 context->mq_sendrecv.mqdes = mqdes;
2581 context->mq_sendrecv.msg_len = msg_le 2120 context->mq_sendrecv.msg_len = msg_len;
2582 context->mq_sendrecv.msg_prio = msg_p 2121 context->mq_sendrecv.msg_prio = msg_prio;
2583 2122
2584 context->type = AUDIT_MQ_SENDRECV; 2123 context->type = AUDIT_MQ_SENDRECV;
2585 } 2124 }
2586 2125
2587 /** 2126 /**
2588 * __audit_mq_notify - record audit data for 2127 * __audit_mq_notify - record audit data for a POSIX MQ notify
2589 * @mqdes: MQ descriptor 2128 * @mqdes: MQ descriptor
2590 * @notification: Notification event 2129 * @notification: Notification event
2591 * 2130 *
2592 */ 2131 */
2593 2132
2594 void __audit_mq_notify(mqd_t mqdes, const str 2133 void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
2595 { 2134 {
2596 struct audit_context *context = audit !! 2135 struct audit_context *context = current->audit_context;
2597 2136
2598 if (notification) 2137 if (notification)
2599 context->mq_notify.sigev_sign 2138 context->mq_notify.sigev_signo = notification->sigev_signo;
2600 else 2139 else
2601 context->mq_notify.sigev_sign 2140 context->mq_notify.sigev_signo = 0;
2602 2141
2603 context->mq_notify.mqdes = mqdes; 2142 context->mq_notify.mqdes = mqdes;
2604 context->type = AUDIT_MQ_NOTIFY; 2143 context->type = AUDIT_MQ_NOTIFY;
2605 } 2144 }
2606 2145
2607 /** 2146 /**
2608 * __audit_mq_getsetattr - record audit data 2147 * __audit_mq_getsetattr - record audit data for a POSIX MQ get/set attribute
2609 * @mqdes: MQ descriptor 2148 * @mqdes: MQ descriptor
2610 * @mqstat: MQ flags 2149 * @mqstat: MQ flags
2611 * 2150 *
2612 */ 2151 */
2613 void __audit_mq_getsetattr(mqd_t mqdes, struc 2152 void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
2614 { 2153 {
2615 struct audit_context *context = audit !! 2154 struct audit_context *context = current->audit_context;
2616 <<
2617 context->mq_getsetattr.mqdes = mqdes; 2155 context->mq_getsetattr.mqdes = mqdes;
2618 context->mq_getsetattr.mqstat = *mqst 2156 context->mq_getsetattr.mqstat = *mqstat;
2619 context->type = AUDIT_MQ_GETSETATTR; 2157 context->type = AUDIT_MQ_GETSETATTR;
2620 } 2158 }
2621 2159
2622 /** 2160 /**
2623 * __audit_ipc_obj - record audit data for ip 2161 * __audit_ipc_obj - record audit data for ipc object
2624 * @ipcp: ipc permissions 2162 * @ipcp: ipc permissions
2625 * 2163 *
2626 */ 2164 */
2627 void __audit_ipc_obj(struct kern_ipc_perm *ip 2165 void __audit_ipc_obj(struct kern_ipc_perm *ipcp)
2628 { 2166 {
2629 struct audit_context *context = audit !! 2167 struct audit_context *context = current->audit_context;
2630 <<
2631 context->ipc.uid = ipcp->uid; 2168 context->ipc.uid = ipcp->uid;
2632 context->ipc.gid = ipcp->gid; 2169 context->ipc.gid = ipcp->gid;
2633 context->ipc.mode = ipcp->mode; 2170 context->ipc.mode = ipcp->mode;
2634 context->ipc.has_perm = 0; 2171 context->ipc.has_perm = 0;
2635 security_ipc_getsecid(ipcp, &context- 2172 security_ipc_getsecid(ipcp, &context->ipc.osid);
2636 context->type = AUDIT_IPC; 2173 context->type = AUDIT_IPC;
2637 } 2174 }
2638 2175
2639 /** 2176 /**
2640 * __audit_ipc_set_perm - record audit data f 2177 * __audit_ipc_set_perm - record audit data for new ipc permissions
2641 * @qbytes: msgq bytes 2178 * @qbytes: msgq bytes
2642 * @uid: msgq user id 2179 * @uid: msgq user id
2643 * @gid: msgq group id 2180 * @gid: msgq group id
2644 * @mode: msgq mode (permissions) 2181 * @mode: msgq mode (permissions)
2645 * 2182 *
2646 * Called only after audit_ipc_obj(). 2183 * Called only after audit_ipc_obj().
2647 */ 2184 */
2648 void __audit_ipc_set_perm(unsigned long qbyte 2185 void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
2649 { 2186 {
2650 struct audit_context *context = audit !! 2187 struct audit_context *context = current->audit_context;
2651 2188
2652 context->ipc.qbytes = qbytes; 2189 context->ipc.qbytes = qbytes;
2653 context->ipc.perm_uid = uid; 2190 context->ipc.perm_uid = uid;
2654 context->ipc.perm_gid = gid; 2191 context->ipc.perm_gid = gid;
2655 context->ipc.perm_mode = mode; 2192 context->ipc.perm_mode = mode;
2656 context->ipc.has_perm = 1; 2193 context->ipc.has_perm = 1;
2657 } 2194 }
2658 2195
2659 void __audit_bprm(struct linux_binprm *bprm) 2196 void __audit_bprm(struct linux_binprm *bprm)
2660 { 2197 {
2661 struct audit_context *context = audit !! 2198 struct audit_context *context = current->audit_context;
2662 2199
2663 context->type = AUDIT_EXECVE; 2200 context->type = AUDIT_EXECVE;
2664 context->execve.argc = bprm->argc; 2201 context->execve.argc = bprm->argc;
2665 } 2202 }
2666 2203
2667 2204
2668 /** 2205 /**
2669 * __audit_socketcall - record audit data for 2206 * __audit_socketcall - record audit data for sys_socketcall
2670 * @nargs: number of args, which should not b 2207 * @nargs: number of args, which should not be more than AUDITSC_ARGS.
2671 * @args: args array 2208 * @args: args array
2672 * 2209 *
2673 */ 2210 */
2674 int __audit_socketcall(int nargs, unsigned lo 2211 int __audit_socketcall(int nargs, unsigned long *args)
2675 { 2212 {
2676 struct audit_context *context = audit !! 2213 struct audit_context *context = current->audit_context;
2677 2214
2678 if (nargs <= 0 || nargs > AUDITSC_ARG 2215 if (nargs <= 0 || nargs > AUDITSC_ARGS || !args)
2679 return -EINVAL; 2216 return -EINVAL;
2680 context->type = AUDIT_SOCKETCALL; 2217 context->type = AUDIT_SOCKETCALL;
2681 context->socketcall.nargs = nargs; 2218 context->socketcall.nargs = nargs;
2682 memcpy(context->socketcall.args, args 2219 memcpy(context->socketcall.args, args, nargs * sizeof(unsigned long));
2683 return 0; 2220 return 0;
2684 } 2221 }
2685 2222
2686 /** 2223 /**
2687 * __audit_fd_pair - record audit data for pi 2224 * __audit_fd_pair - record audit data for pipe and socketpair
2688 * @fd1: the first file descriptor 2225 * @fd1: the first file descriptor
2689 * @fd2: the second file descriptor 2226 * @fd2: the second file descriptor
2690 * 2227 *
2691 */ 2228 */
2692 void __audit_fd_pair(int fd1, int fd2) 2229 void __audit_fd_pair(int fd1, int fd2)
2693 { 2230 {
2694 struct audit_context *context = audit !! 2231 struct audit_context *context = current->audit_context;
2695 <<
2696 context->fds[0] = fd1; 2232 context->fds[0] = fd1;
2697 context->fds[1] = fd2; 2233 context->fds[1] = fd2;
2698 } 2234 }
2699 2235
2700 /** 2236 /**
2701 * __audit_sockaddr - record audit data for s 2237 * __audit_sockaddr - record audit data for sys_bind, sys_connect, sys_sendto
2702 * @len: data length in user space 2238 * @len: data length in user space
2703 * @a: data address in kernel space 2239 * @a: data address in kernel space
2704 * 2240 *
2705 * Returns 0 for success or NULL context or < 2241 * Returns 0 for success or NULL context or < 0 on error.
2706 */ 2242 */
2707 int __audit_sockaddr(int len, void *a) 2243 int __audit_sockaddr(int len, void *a)
2708 { 2244 {
2709 struct audit_context *context = audit !! 2245 struct audit_context *context = current->audit_context;
2710 2246
2711 if (!context->sockaddr) { 2247 if (!context->sockaddr) {
2712 void *p = kmalloc(sizeof(stru 2248 void *p = kmalloc(sizeof(struct sockaddr_storage), GFP_KERNEL);
2713 <<
2714 if (!p) 2249 if (!p)
2715 return -ENOMEM; 2250 return -ENOMEM;
2716 context->sockaddr = p; 2251 context->sockaddr = p;
2717 } 2252 }
2718 2253
2719 context->sockaddr_len = len; 2254 context->sockaddr_len = len;
2720 memcpy(context->sockaddr, a, len); 2255 memcpy(context->sockaddr, a, len);
2721 return 0; 2256 return 0;
2722 } 2257 }
2723 2258
2724 void __audit_ptrace(struct task_struct *t) 2259 void __audit_ptrace(struct task_struct *t)
2725 { 2260 {
2726 struct audit_context *context = audit !! 2261 struct audit_context *context = current->audit_context;
2727 2262
2728 context->target_pid = task_tgid_nr(t) 2263 context->target_pid = task_tgid_nr(t);
2729 context->target_auid = audit_get_logi 2264 context->target_auid = audit_get_loginuid(t);
2730 context->target_uid = task_uid(t); 2265 context->target_uid = task_uid(t);
2731 context->target_sessionid = audit_get 2266 context->target_sessionid = audit_get_sessionid(t);
2732 security_task_getsecid_obj(t, &contex !! 2267 security_task_getsecid(t, &context->target_sid);
2733 memcpy(context->target_comm, t->comm, 2268 memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
2734 } 2269 }
2735 2270
2736 /** 2271 /**
2737 * audit_signal_info_syscall - record signal !! 2272 * audit_signal_info - record signal info for shutting down audit subsystem
>> 2273 * @sig: signal value
2738 * @t: task being signaled 2274 * @t: task being signaled
2739 * 2275 *
2740 * If the audit subsystem is being terminated 2276 * If the audit subsystem is being terminated, record the task (pid)
2741 * and uid that is doing that. 2277 * and uid that is doing that.
2742 */ 2278 */
2743 int audit_signal_info_syscall(struct task_str !! 2279 int audit_signal_info(int sig, struct task_struct *t)
2744 { 2280 {
2745 struct audit_aux_data_pids *axp; 2281 struct audit_aux_data_pids *axp;
2746 struct audit_context *ctx = audit_con !! 2282 struct task_struct *tsk = current;
2747 kuid_t t_uid = task_uid(t); !! 2283 struct audit_context *ctx = tsk->audit_context;
>> 2284 kuid_t uid = current_uid(), t_uid = task_uid(t);
>> 2285
>> 2286 if (auditd_test_task(t) &&
>> 2287 (sig == SIGTERM || sig == SIGHUP ||
>> 2288 sig == SIGUSR1 || sig == SIGUSR2)) {
>> 2289 audit_sig_pid = task_tgid_nr(tsk);
>> 2290 if (uid_valid(tsk->loginuid))
>> 2291 audit_sig_uid = tsk->loginuid;
>> 2292 else
>> 2293 audit_sig_uid = uid;
>> 2294 security_task_getsecid(tsk, &audit_sig_sid);
>> 2295 }
2748 2296
2749 if (!audit_signals || audit_dummy_con 2297 if (!audit_signals || audit_dummy_context())
2750 return 0; 2298 return 0;
2751 2299
2752 /* optimize the common case by puttin 2300 /* optimize the common case by putting first signal recipient directly
2753 * in audit_context */ 2301 * in audit_context */
2754 if (!ctx->target_pid) { 2302 if (!ctx->target_pid) {
2755 ctx->target_pid = task_tgid_n 2303 ctx->target_pid = task_tgid_nr(t);
2756 ctx->target_auid = audit_get_ 2304 ctx->target_auid = audit_get_loginuid(t);
2757 ctx->target_uid = t_uid; 2305 ctx->target_uid = t_uid;
2758 ctx->target_sessionid = audit 2306 ctx->target_sessionid = audit_get_sessionid(t);
2759 security_task_getsecid_obj(t, !! 2307 security_task_getsecid(t, &ctx->target_sid);
2760 memcpy(ctx->target_comm, t->c 2308 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
2761 return 0; 2309 return 0;
2762 } 2310 }
2763 2311
2764 axp = (void *)ctx->aux_pids; 2312 axp = (void *)ctx->aux_pids;
2765 if (!axp || axp->pid_count == AUDIT_A 2313 if (!axp || axp->pid_count == AUDIT_AUX_PIDS) {
2766 axp = kzalloc(sizeof(*axp), G 2314 axp = kzalloc(sizeof(*axp), GFP_ATOMIC);
2767 if (!axp) 2315 if (!axp)
2768 return -ENOMEM; 2316 return -ENOMEM;
2769 2317
2770 axp->d.type = AUDIT_OBJ_PID; 2318 axp->d.type = AUDIT_OBJ_PID;
2771 axp->d.next = ctx->aux_pids; 2319 axp->d.next = ctx->aux_pids;
2772 ctx->aux_pids = (void *)axp; 2320 ctx->aux_pids = (void *)axp;
2773 } 2321 }
2774 BUG_ON(axp->pid_count >= AUDIT_AUX_PI 2322 BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
2775 2323
2776 axp->target_pid[axp->pid_count] = tas 2324 axp->target_pid[axp->pid_count] = task_tgid_nr(t);
2777 axp->target_auid[axp->pid_count] = au 2325 axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
2778 axp->target_uid[axp->pid_count] = t_u 2326 axp->target_uid[axp->pid_count] = t_uid;
2779 axp->target_sessionid[axp->pid_count] 2327 axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
2780 security_task_getsecid_obj(t, &axp->t !! 2328 security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
2781 memcpy(axp->target_comm[axp->pid_coun 2329 memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
2782 axp->pid_count++; 2330 axp->pid_count++;
2783 2331
2784 return 0; 2332 return 0;
2785 } 2333 }
2786 2334
2787 /** 2335 /**
2788 * __audit_log_bprm_fcaps - store information 2336 * __audit_log_bprm_fcaps - store information about a loading bprm and relevant fcaps
2789 * @bprm: pointer to the bprm being processed 2337 * @bprm: pointer to the bprm being processed
2790 * @new: the proposed new credentials 2338 * @new: the proposed new credentials
2791 * @old: the old credentials 2339 * @old: the old credentials
2792 * 2340 *
2793 * Simply check if the proc already has the c 2341 * Simply check if the proc already has the caps given by the file and if not
2794 * store the priv escalation info for later a 2342 * store the priv escalation info for later auditing at the end of the syscall
2795 * 2343 *
2796 * -Eric 2344 * -Eric
2797 */ 2345 */
2798 int __audit_log_bprm_fcaps(struct linux_binpr 2346 int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
2799 const struct cred 2347 const struct cred *new, const struct cred *old)
2800 { 2348 {
2801 struct audit_aux_data_bprm_fcaps *ax; 2349 struct audit_aux_data_bprm_fcaps *ax;
2802 struct audit_context *context = audit !! 2350 struct audit_context *context = current->audit_context;
2803 struct cpu_vfs_cap_data vcaps; 2351 struct cpu_vfs_cap_data vcaps;
2804 2352
2805 ax = kmalloc(sizeof(*ax), GFP_KERNEL) 2353 ax = kmalloc(sizeof(*ax), GFP_KERNEL);
2806 if (!ax) 2354 if (!ax)
2807 return -ENOMEM; 2355 return -ENOMEM;
2808 2356
2809 ax->d.type = AUDIT_BPRM_FCAPS; 2357 ax->d.type = AUDIT_BPRM_FCAPS;
2810 ax->d.next = context->aux; 2358 ax->d.next = context->aux;
2811 context->aux = (void *)ax; 2359 context->aux = (void *)ax;
2812 2360
2813 get_vfs_caps_from_disk(&nop_mnt_idmap !! 2361 get_vfs_caps_from_disk(bprm->file->f_path.dentry, &vcaps);
2814 bprm->file->f_ <<
2815 2362
2816 ax->fcap.permitted = vcaps.permitted; 2363 ax->fcap.permitted = vcaps.permitted;
2817 ax->fcap.inheritable = vcaps.inherita 2364 ax->fcap.inheritable = vcaps.inheritable;
2818 ax->fcap.fE = !!(vcaps.magic_etc & VF 2365 ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
2819 ax->fcap.rootid = vcaps.rootid; <<
2820 ax->fcap_ver = (vcaps.magic_etc & VFS 2366 ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
2821 2367
2822 ax->old_pcap.permitted = old->cap_p 2368 ax->old_pcap.permitted = old->cap_permitted;
2823 ax->old_pcap.inheritable = old->cap_i 2369 ax->old_pcap.inheritable = old->cap_inheritable;
2824 ax->old_pcap.effective = old->cap_e 2370 ax->old_pcap.effective = old->cap_effective;
2825 ax->old_pcap.ambient = old->cap_a 2371 ax->old_pcap.ambient = old->cap_ambient;
2826 2372
2827 ax->new_pcap.permitted = new->cap_p 2373 ax->new_pcap.permitted = new->cap_permitted;
2828 ax->new_pcap.inheritable = new->cap_i 2374 ax->new_pcap.inheritable = new->cap_inheritable;
2829 ax->new_pcap.effective = new->cap_e 2375 ax->new_pcap.effective = new->cap_effective;
2830 ax->new_pcap.ambient = new->cap_a 2376 ax->new_pcap.ambient = new->cap_ambient;
2831 return 0; 2377 return 0;
2832 } 2378 }
2833 2379
2834 /** 2380 /**
2835 * __audit_log_capset - store information abo 2381 * __audit_log_capset - store information about the arguments to the capset syscall
2836 * @new: the new credentials 2382 * @new: the new credentials
2837 * @old: the old (current) credentials 2383 * @old: the old (current) credentials
2838 * 2384 *
2839 * Record the arguments userspace sent to sys 2385 * Record the arguments userspace sent to sys_capset for later printing by the
2840 * audit system if applicable 2386 * audit system if applicable
2841 */ 2387 */
2842 void __audit_log_capset(const struct cred *ne 2388 void __audit_log_capset(const struct cred *new, const struct cred *old)
2843 { 2389 {
2844 struct audit_context *context = audit !! 2390 struct audit_context *context = current->audit_context;
2845 <<
2846 context->capset.pid = task_tgid_nr(cu 2391 context->capset.pid = task_tgid_nr(current);
2847 context->capset.cap.effective = new 2392 context->capset.cap.effective = new->cap_effective;
2848 context->capset.cap.inheritable = new 2393 context->capset.cap.inheritable = new->cap_effective;
2849 context->capset.cap.permitted = new 2394 context->capset.cap.permitted = new->cap_permitted;
2850 context->capset.cap.ambient = new 2395 context->capset.cap.ambient = new->cap_ambient;
2851 context->type = AUDIT_CAPSET; 2396 context->type = AUDIT_CAPSET;
2852 } 2397 }
2853 2398
2854 void __audit_mmap_fd(int fd, int flags) 2399 void __audit_mmap_fd(int fd, int flags)
2855 { 2400 {
2856 struct audit_context *context = audit !! 2401 struct audit_context *context = current->audit_context;
2857 <<
2858 context->mmap.fd = fd; 2402 context->mmap.fd = fd;
2859 context->mmap.flags = flags; 2403 context->mmap.flags = flags;
2860 context->type = AUDIT_MMAP; 2404 context->type = AUDIT_MMAP;
2861 } 2405 }
2862 2406
2863 void __audit_openat2_how(struct open_how *how <<
2864 { <<
2865 struct audit_context *context = audit <<
2866 <<
2867 context->openat2.flags = how->flags; <<
2868 context->openat2.mode = how->mode; <<
2869 context->openat2.resolve = how->resol <<
2870 context->type = AUDIT_OPENAT2; <<
2871 } <<
2872 <<
2873 void __audit_log_kern_module(char *name) 2407 void __audit_log_kern_module(char *name)
2874 { 2408 {
2875 struct audit_context *context = audit !! 2409 struct audit_context *context = current->audit_context;
2876 2410
2877 context->module.name = kstrdup(name, !! 2411 context->module.name = kmalloc(strlen(name) + 1, GFP_KERNEL);
2878 if (!context->module.name) !! 2412 strcpy(context->module.name, name);
2879 audit_log_lost("out of memory <<
2880 context->type = AUDIT_KERN_MODULE; 2413 context->type = AUDIT_KERN_MODULE;
2881 } 2414 }
2882 2415
2883 void __audit_fanotify(u32 response, struct fa !! 2416 void __audit_fanotify(unsigned int response)
2884 { <<
2885 /* {subj,obj}_trust values are {0,1,2 <<
2886 switch (friar->hdr.type) { <<
2887 case FAN_RESPONSE_INFO_NONE: <<
2888 audit_log(audit_context(), GF <<
2889 "resp=%u fan_type=% <<
2890 response, FAN_RESPO <<
2891 break; <<
2892 case FAN_RESPONSE_INFO_AUDIT_RULE: <<
2893 audit_log(audit_context(), GF <<
2894 "resp=%u fan_type=% <<
2895 response, friar->hd <<
2896 friar->subj_trust, <<
2897 } <<
2898 } <<
2899 <<
2900 void __audit_tk_injoffset(struct timespec64 o <<
2901 { 2417 {
2902 struct audit_context *context = audit !! 2418 audit_log(current->audit_context, GFP_KERNEL,
2903 !! 2419 AUDIT_FANOTIFY, "resp=%u", response);
2904 /* only set type if not already set b <<
2905 if (!context->type) <<
2906 context->type = AUDIT_TIME_IN <<
2907 memcpy(&context->time.tk_injoffset, & <<
2908 } 2420 }
2909 2421
2910 void __audit_ntp_log(const struct audit_ntp_d <<
2911 { <<
2912 struct audit_context *context = audit <<
2913 int type; <<
2914 <<
2915 for (type = 0; type < AUDIT_NTP_NVALS <<
2916 if (ad->vals[type].newval != <<
2917 /* unconditionally se <<
2918 context->type = AUDIT <<
2919 memcpy(&context->time <<
2920 break; <<
2921 } <<
2922 } <<
2923 <<
2924 void __audit_log_nfcfg(const char *name, u8 a <<
2925 enum audit_nfcfgop op, <<
2926 { <<
2927 struct audit_buffer *ab; <<
2928 char comm[sizeof(current->comm)]; <<
2929 <<
2930 ab = audit_log_start(audit_context(), <<
2931 if (!ab) <<
2932 return; <<
2933 audit_log_format(ab, "table=%s family <<
2934 name, af, nentries, <<
2935 <<
2936 audit_log_format(ab, " pid=%u", task_ <<
2937 audit_log_task_context(ab); /* subj= <<
2938 audit_log_format(ab, " comm="); <<
2939 audit_log_untrustedstring(ab, get_tas <<
2940 audit_log_end(ab); <<
2941 } <<
2942 EXPORT_SYMBOL_GPL(__audit_log_nfcfg); <<
2943 <<
2944 static void audit_log_task(struct audit_buffe 2422 static void audit_log_task(struct audit_buffer *ab)
2945 { 2423 {
2946 kuid_t auid, uid; 2424 kuid_t auid, uid;
2947 kgid_t gid; 2425 kgid_t gid;
2948 unsigned int sessionid; 2426 unsigned int sessionid;
2949 char comm[sizeof(current->comm)]; 2427 char comm[sizeof(current->comm)];
2950 2428
2951 auid = audit_get_loginuid(current); 2429 auid = audit_get_loginuid(current);
2952 sessionid = audit_get_sessionid(curre 2430 sessionid = audit_get_sessionid(current);
2953 current_uid_gid(&uid, &gid); 2431 current_uid_gid(&uid, &gid);
2954 2432
2955 audit_log_format(ab, "auid=%u uid=%u 2433 audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
2956 from_kuid(&init_user 2434 from_kuid(&init_user_ns, auid),
2957 from_kuid(&init_user 2435 from_kuid(&init_user_ns, uid),
2958 from_kgid(&init_user 2436 from_kgid(&init_user_ns, gid),
2959 sessionid); 2437 sessionid);
2960 audit_log_task_context(ab); 2438 audit_log_task_context(ab);
2961 audit_log_format(ab, " pid=%d comm=", 2439 audit_log_format(ab, " pid=%d comm=", task_tgid_nr(current));
2962 audit_log_untrustedstring(ab, get_tas 2440 audit_log_untrustedstring(ab, get_task_comm(comm, current));
2963 audit_log_d_path_exe(ab, current->mm) 2441 audit_log_d_path_exe(ab, current->mm);
2964 } 2442 }
2965 2443
2966 /** 2444 /**
2967 * audit_core_dumps - record information abou 2445 * audit_core_dumps - record information about processes that end abnormally
2968 * @signr: signal value 2446 * @signr: signal value
2969 * 2447 *
2970 * If a process ends with a core dump, someth 2448 * If a process ends with a core dump, something fishy is going on and we
2971 * should record the event for investigation. 2449 * should record the event for investigation.
2972 */ 2450 */
2973 void audit_core_dumps(long signr) 2451 void audit_core_dumps(long signr)
2974 { 2452 {
2975 struct audit_buffer *ab; 2453 struct audit_buffer *ab;
2976 2454
2977 if (!audit_enabled) 2455 if (!audit_enabled)
2978 return; 2456 return;
2979 2457
2980 if (signr == SIGQUIT) /* don't care 2458 if (signr == SIGQUIT) /* don't care for those */
2981 return; 2459 return;
2982 2460
2983 ab = audit_log_start(audit_context(), !! 2461 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
2984 if (unlikely(!ab)) 2462 if (unlikely(!ab))
2985 return; 2463 return;
2986 audit_log_task(ab); 2464 audit_log_task(ab);
2987 audit_log_format(ab, " sig=%ld res=1" 2465 audit_log_format(ab, " sig=%ld res=1", signr);
2988 audit_log_end(ab); 2466 audit_log_end(ab);
2989 } 2467 }
2990 2468
2991 /** !! 2469 void __audit_seccomp(unsigned long syscall, long signr, int code)
2992 * audit_seccomp - record information about a <<
2993 * @syscall: syscall number <<
2994 * @signr: signal value <<
2995 * @code: the seccomp action <<
2996 * <<
2997 * Record the information associated with a s <<
2998 * seccomp actions that are not to be logged <<
2999 * Therefore, this function forces auditing i <<
3000 * and dummy context state because seccomp ac <<
3001 * audit is not in use. <<
3002 */ <<
3003 void audit_seccomp(unsigned long syscall, lon <<
3004 { 2470 {
3005 struct audit_buffer *ab; 2471 struct audit_buffer *ab;
3006 2472
3007 ab = audit_log_start(audit_context(), !! 2473 ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_SECCOMP);
3008 if (unlikely(!ab)) 2474 if (unlikely(!ab))
3009 return; 2475 return;
3010 audit_log_task(ab); 2476 audit_log_task(ab);
3011 audit_log_format(ab, " sig=%ld arch=% 2477 audit_log_format(ab, " sig=%ld arch=%x syscall=%ld compat=%d ip=0x%lx code=0x%x",
3012 signr, syscall_get_a !! 2478 signr, syscall_get_arch(), syscall,
3013 in_compat_syscall(), 2479 in_compat_syscall(), KSTK_EIP(current), code);
3014 audit_log_end(ab); 2480 audit_log_end(ab);
3015 } 2481 }
3016 2482
3017 void audit_seccomp_actions_logged(const char <<
3018 int res) <<
3019 { <<
3020 struct audit_buffer *ab; <<
3021 <<
3022 if (!audit_enabled) <<
3023 return; <<
3024 <<
3025 ab = audit_log_start(audit_context(), <<
3026 AUDIT_CONFIG_CHA <<
3027 if (unlikely(!ab)) <<
3028 return; <<
3029 <<
3030 audit_log_format(ab, <<
3031 "op=seccomp-logging <<
3032 names, old_names, re <<
3033 audit_log_end(ab); <<
3034 } <<
3035 <<
3036 struct list_head *audit_killed_trees(void) 2483 struct list_head *audit_killed_trees(void)
3037 { 2484 {
3038 struct audit_context *ctx = audit_con !! 2485 struct audit_context *ctx = current->audit_context;
3039 if (likely(!ctx || ctx->context == AU !! 2486 if (likely(!ctx || !ctx->in_syscall))
3040 return NULL; 2487 return NULL;
3041 return &ctx->killed_trees; 2488 return &ctx->killed_trees;
3042 } 2489 }
3043 2490
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.