1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 // 2 //
3 // Validation of USB-audio class descriptors 3 // Validation of USB-audio class descriptors
4 // 4 //
5 5
6 #include <linux/init.h> 6 #include <linux/init.h>
7 #include <linux/usb.h> 7 #include <linux/usb.h>
8 #include <linux/usb/audio.h> 8 #include <linux/usb/audio.h>
9 #include <linux/usb/audio-v2.h> 9 #include <linux/usb/audio-v2.h>
10 #include <linux/usb/audio-v3.h> 10 #include <linux/usb/audio-v3.h>
11 #include <linux/usb/midi.h> 11 #include <linux/usb/midi.h>
12 #include "usbaudio.h" 12 #include "usbaudio.h"
13 #include "helper.h" 13 #include "helper.h"
14 14
15 struct usb_desc_validator { 15 struct usb_desc_validator {
16 unsigned char protocol; 16 unsigned char protocol;
17 unsigned char type; 17 unsigned char type;
18 bool (*func)(const void *p, const stru 18 bool (*func)(const void *p, const struct usb_desc_validator *v);
19 size_t size; 19 size_t size;
20 }; 20 };
21 21
22 #define UAC_VERSION_ALL (unsigned char 22 #define UAC_VERSION_ALL (unsigned char)(-1)
23 23
24 /* UAC1 only */ 24 /* UAC1 only */
25 static bool validate_uac1_header(const void *p 25 static bool validate_uac1_header(const void *p,
26 const struct 26 const struct usb_desc_validator *v)
27 { 27 {
28 const struct uac1_ac_header_descriptor 28 const struct uac1_ac_header_descriptor *d = p;
29 29
30 return d->bLength >= sizeof(*d) && 30 return d->bLength >= sizeof(*d) &&
31 d->bLength >= sizeof(*d) + d-> 31 d->bLength >= sizeof(*d) + d->bInCollection;
32 } 32 }
33 33
34 /* for mixer unit; covering all UACs */ 34 /* for mixer unit; covering all UACs */
35 static bool validate_mixer_unit(const void *p, 35 static bool validate_mixer_unit(const void *p,
36 const struct u 36 const struct usb_desc_validator *v)
37 { 37 {
38 const struct uac_mixer_unit_descriptor 38 const struct uac_mixer_unit_descriptor *d = p;
39 size_t len; 39 size_t len;
40 40
41 if (d->bLength < sizeof(*d) || !d->bNr 41 if (d->bLength < sizeof(*d) || !d->bNrInPins)
42 return false; 42 return false;
43 len = sizeof(*d) + d->bNrInPins; 43 len = sizeof(*d) + d->bNrInPins;
44 /* We can't determine the bitmap size 44 /* We can't determine the bitmap size only from this unit descriptor,
45 * so just check with the remaining le 45 * so just check with the remaining length.
46 * The actual bitmap is checked at mix 46 * The actual bitmap is checked at mixer unit parser.
47 */ 47 */
48 switch (v->protocol) { 48 switch (v->protocol) {
49 case UAC_VERSION_1: 49 case UAC_VERSION_1:
50 default: 50 default:
51 len += 2 + 1; /* wChannelConfi 51 len += 2 + 1; /* wChannelConfig, iChannelNames */
52 /* bmControls[n*m] */ 52 /* bmControls[n*m] */
53 len += 1; /* iMixer */ 53 len += 1; /* iMixer */
54 break; 54 break;
55 case UAC_VERSION_2: 55 case UAC_VERSION_2:
56 len += 4 + 1; /* bmChannelConf 56 len += 4 + 1; /* bmChannelConfig, iChannelNames */
57 /* bmMixerControls[n*m] */ 57 /* bmMixerControls[n*m] */
58 len += 1 + 1; /* bmControls, i 58 len += 1 + 1; /* bmControls, iMixer */
59 break; 59 break;
60 case UAC_VERSION_3: 60 case UAC_VERSION_3:
61 len += 2; /* wClusterDescrID * 61 len += 2; /* wClusterDescrID */
62 /* bmMixerControls[n*m] */ 62 /* bmMixerControls[n*m] */
63 break; 63 break;
64 } 64 }
65 return d->bLength >= len; 65 return d->bLength >= len;
66 } 66 }
67 67
68 /* both for processing and extension units; co 68 /* both for processing and extension units; covering all UACs */
69 static bool validate_processing_unit(const voi 69 static bool validate_processing_unit(const void *p,
70 const str 70 const struct usb_desc_validator *v)
71 { 71 {
72 const struct uac_processing_unit_descr 72 const struct uac_processing_unit_descriptor *d = p;
73 const unsigned char *hdr = p; 73 const unsigned char *hdr = p;
74 size_t len, m; 74 size_t len, m;
75 75
76 if (d->bLength < sizeof(*d)) 76 if (d->bLength < sizeof(*d))
77 return false; 77 return false;
78 len = sizeof(*d) + d->bNrInPins; 78 len = sizeof(*d) + d->bNrInPins;
79 if (d->bLength < len) 79 if (d->bLength < len)
80 return false; 80 return false;
81 switch (v->protocol) { 81 switch (v->protocol) {
82 case UAC_VERSION_1: 82 case UAC_VERSION_1:
83 default: 83 default:
84 /* bNrChannels, wChannelConfig 84 /* bNrChannels, wChannelConfig, iChannelNames */
85 len += 1 + 2 + 1; 85 len += 1 + 2 + 1;
86 if (d->bLength < len + 1) /* b 86 if (d->bLength < len + 1) /* bControlSize */
87 return false; 87 return false;
88 m = hdr[len]; 88 m = hdr[len];
89 len += 1 + m + 1; /* bControlS 89 len += 1 + m + 1; /* bControlSize, bmControls, iProcessing */
90 break; 90 break;
91 case UAC_VERSION_2: 91 case UAC_VERSION_2:
92 /* bNrChannels, bmChannelConfi 92 /* bNrChannels, bmChannelConfig, iChannelNames */
93 len += 1 + 4 + 1; 93 len += 1 + 4 + 1;
94 if (v->type == UAC2_PROCESSING 94 if (v->type == UAC2_PROCESSING_UNIT_V2)
95 len += 2; /* bmControl 95 len += 2; /* bmControls -- 2 bytes for PU */
96 else 96 else
97 len += 1; /* bmControl 97 len += 1; /* bmControls -- 1 byte for EU */
98 len += 1; /* iProcessing */ 98 len += 1; /* iProcessing */
99 break; 99 break;
100 case UAC_VERSION_3: 100 case UAC_VERSION_3:
101 /* wProcessingDescrStr, bmCont 101 /* wProcessingDescrStr, bmControls */
102 len += 2 + 4; 102 len += 2 + 4;
103 break; 103 break;
104 } 104 }
105 if (d->bLength < len) 105 if (d->bLength < len)
106 return false; 106 return false;
107 107
108 switch (v->protocol) { 108 switch (v->protocol) {
109 case UAC_VERSION_1: 109 case UAC_VERSION_1:
110 default: 110 default:
111 if (v->type == UAC1_EXTENSION_ 111 if (v->type == UAC1_EXTENSION_UNIT)
112 return true; /* OK */ 112 return true; /* OK */
113 switch (le16_to_cpu(d->wProces 113 switch (le16_to_cpu(d->wProcessType)) {
114 case UAC_PROCESS_UP_DOWNMIX: 114 case UAC_PROCESS_UP_DOWNMIX:
115 case UAC_PROCESS_DOLBY_PROLOGI 115 case UAC_PROCESS_DOLBY_PROLOGIC:
116 if (d->bLength < len + 116 if (d->bLength < len + 1) /* bNrModes */
117 return false; 117 return false;
118 m = hdr[len]; 118 m = hdr[len];
119 len += 1 + m * 2; /* b 119 len += 1 + m * 2; /* bNrModes, waModes(n) */
120 break; 120 break;
121 default: 121 default:
122 break; 122 break;
123 } 123 }
124 break; 124 break;
125 case UAC_VERSION_2: 125 case UAC_VERSION_2:
126 if (v->type == UAC2_EXTENSION_ 126 if (v->type == UAC2_EXTENSION_UNIT_V2)
127 return true; /* OK */ 127 return true; /* OK */
128 switch (le16_to_cpu(d->wProces 128 switch (le16_to_cpu(d->wProcessType)) {
129 case UAC2_PROCESS_UP_DOWNMIX: 129 case UAC2_PROCESS_UP_DOWNMIX:
130 case UAC2_PROCESS_DOLBY_PROLOC 130 case UAC2_PROCESS_DOLBY_PROLOCIC: /* SiC! */
131 if (d->bLength < len + 131 if (d->bLength < len + 1) /* bNrModes */
132 return false; 132 return false;
133 m = hdr[len]; 133 m = hdr[len];
134 len += 1 + m * 4; /* b 134 len += 1 + m * 4; /* bNrModes, daModes(n) */
135 break; 135 break;
136 default: 136 default:
137 break; 137 break;
138 } 138 }
139 break; 139 break;
140 case UAC_VERSION_3: 140 case UAC_VERSION_3:
141 if (v->type == UAC3_EXTENSION_ 141 if (v->type == UAC3_EXTENSION_UNIT) {
142 len += 2; /* wClusterD 142 len += 2; /* wClusterDescrID */
143 break; 143 break;
144 } 144 }
145 switch (le16_to_cpu(d->wProces 145 switch (le16_to_cpu(d->wProcessType)) {
146 case UAC3_PROCESS_UP_DOWNMIX: 146 case UAC3_PROCESS_UP_DOWNMIX:
147 if (d->bLength < len + 147 if (d->bLength < len + 1) /* bNrModes */
148 return false; 148 return false;
149 m = hdr[len]; 149 m = hdr[len];
150 len += 1 + m * 2; /* b 150 len += 1 + m * 2; /* bNrModes, waClusterDescrID(n) */
151 break; 151 break;
152 case UAC3_PROCESS_MULTI_FUNCTI 152 case UAC3_PROCESS_MULTI_FUNCTION:
153 len += 2 + 4; /* wClus 153 len += 2 + 4; /* wClusterDescrID, bmAlgorighms */
154 break; 154 break;
155 default: 155 default:
156 break; 156 break;
157 } 157 }
158 break; 158 break;
159 } 159 }
160 if (d->bLength < len) 160 if (d->bLength < len)
161 return false; 161 return false;
162 162
163 return true; 163 return true;
164 } 164 }
165 165
166 /* both for selector and clock selector units; 166 /* both for selector and clock selector units; covering all UACs */
167 static bool validate_selector_unit(const void 167 static bool validate_selector_unit(const void *p,
168 const struc 168 const struct usb_desc_validator *v)
169 { 169 {
170 const struct uac_selector_unit_descrip 170 const struct uac_selector_unit_descriptor *d = p;
171 size_t len; 171 size_t len;
172 172
173 if (d->bLength < sizeof(*d)) 173 if (d->bLength < sizeof(*d))
174 return false; 174 return false;
175 len = sizeof(*d) + d->bNrInPins; 175 len = sizeof(*d) + d->bNrInPins;
176 switch (v->protocol) { 176 switch (v->protocol) {
177 case UAC_VERSION_1: 177 case UAC_VERSION_1:
178 default: 178 default:
179 len += 1; /* iSelector */ 179 len += 1; /* iSelector */
180 break; 180 break;
181 case UAC_VERSION_2: 181 case UAC_VERSION_2:
182 len += 1 + 1; /* bmControls, i 182 len += 1 + 1; /* bmControls, iSelector */
183 break; 183 break;
184 case UAC_VERSION_3: 184 case UAC_VERSION_3:
185 len += 4 + 2; /* bmControls, w 185 len += 4 + 2; /* bmControls, wSelectorDescrStr */
186 break; 186 break;
187 } 187 }
188 return d->bLength >= len; 188 return d->bLength >= len;
189 } 189 }
190 190
191 static bool validate_uac1_feature_unit(const v 191 static bool validate_uac1_feature_unit(const void *p,
192 const s 192 const struct usb_desc_validator *v)
193 { 193 {
194 const struct uac_feature_unit_descript 194 const struct uac_feature_unit_descriptor *d = p;
195 195
196 if (d->bLength < sizeof(*d) || !d->bCo 196 if (d->bLength < sizeof(*d) || !d->bControlSize)
197 return false; 197 return false;
198 /* at least bmaControls(0) for master 198 /* at least bmaControls(0) for master channel + iFeature */
199 return d->bLength >= sizeof(*d) + d->b 199 return d->bLength >= sizeof(*d) + d->bControlSize + 1;
200 } 200 }
201 201
202 static bool validate_uac2_feature_unit(const v 202 static bool validate_uac2_feature_unit(const void *p,
203 const s 203 const struct usb_desc_validator *v)
204 { 204 {
205 const struct uac2_feature_unit_descrip 205 const struct uac2_feature_unit_descriptor *d = p;
206 206
207 if (d->bLength < sizeof(*d)) 207 if (d->bLength < sizeof(*d))
208 return false; 208 return false;
209 /* at least bmaControls(0) for master 209 /* at least bmaControls(0) for master channel + iFeature */
210 return d->bLength >= sizeof(*d) + 4 + 210 return d->bLength >= sizeof(*d) + 4 + 1;
211 } 211 }
212 212
213 static bool validate_uac3_feature_unit(const v 213 static bool validate_uac3_feature_unit(const void *p,
214 const s 214 const struct usb_desc_validator *v)
215 { 215 {
216 const struct uac3_feature_unit_descrip 216 const struct uac3_feature_unit_descriptor *d = p;
217 217
218 if (d->bLength < sizeof(*d)) 218 if (d->bLength < sizeof(*d))
219 return false; 219 return false;
220 /* at least bmaControls(0) for master 220 /* at least bmaControls(0) for master channel + wFeatureDescrStr */
221 return d->bLength >= sizeof(*d) + 4 + 221 return d->bLength >= sizeof(*d) + 4 + 2;
222 } 222 }
223 223
224 static bool validate_midi_out_jack(const void 224 static bool validate_midi_out_jack(const void *p,
225 const struc 225 const struct usb_desc_validator *v)
226 { 226 {
227 const struct usb_midi_out_jack_descrip 227 const struct usb_midi_out_jack_descriptor *d = p;
228 228
229 return d->bLength >= sizeof(*d) && 229 return d->bLength >= sizeof(*d) &&
230 d->bLength >= sizeof(*d) + d-> 230 d->bLength >= sizeof(*d) + d->bNrInputPins * 2;
231 } 231 }
232 232
233 #define FIXED(p, t, s) { .protocol = (p), .typ 233 #define FIXED(p, t, s) { .protocol = (p), .type = (t), .size = sizeof(s) }
234 #define FUNC(p, t, f) { .protocol = (p), .type 234 #define FUNC(p, t, f) { .protocol = (p), .type = (t), .func = (f) }
235 235
236 static const struct usb_desc_validator audio_v 236 static const struct usb_desc_validator audio_validators[] = {
237 /* UAC1 */ 237 /* UAC1 */
238 FUNC(UAC_VERSION_1, UAC_HEADER, valida 238 FUNC(UAC_VERSION_1, UAC_HEADER, validate_uac1_header),
239 FIXED(UAC_VERSION_1, UAC_INPUT_TERMINA 239 FIXED(UAC_VERSION_1, UAC_INPUT_TERMINAL,
240 struct uac_input_terminal_descri 240 struct uac_input_terminal_descriptor),
241 FIXED(UAC_VERSION_1, UAC_OUTPUT_TERMIN 241 FIXED(UAC_VERSION_1, UAC_OUTPUT_TERMINAL,
242 struct uac1_output_terminal_desc 242 struct uac1_output_terminal_descriptor),
243 FUNC(UAC_VERSION_1, UAC_MIXER_UNIT, va 243 FUNC(UAC_VERSION_1, UAC_MIXER_UNIT, validate_mixer_unit),
244 FUNC(UAC_VERSION_1, UAC_SELECTOR_UNIT, 244 FUNC(UAC_VERSION_1, UAC_SELECTOR_UNIT, validate_selector_unit),
245 FUNC(UAC_VERSION_1, UAC_FEATURE_UNIT, 245 FUNC(UAC_VERSION_1, UAC_FEATURE_UNIT, validate_uac1_feature_unit),
246 FUNC(UAC_VERSION_1, UAC1_PROCESSING_UN 246 FUNC(UAC_VERSION_1, UAC1_PROCESSING_UNIT, validate_processing_unit),
247 FUNC(UAC_VERSION_1, UAC1_EXTENSION_UNI 247 FUNC(UAC_VERSION_1, UAC1_EXTENSION_UNIT, validate_processing_unit),
248 248
249 /* UAC2 */ 249 /* UAC2 */
250 FIXED(UAC_VERSION_2, UAC_HEADER, struc 250 FIXED(UAC_VERSION_2, UAC_HEADER, struct uac2_ac_header_descriptor),
251 FIXED(UAC_VERSION_2, UAC_INPUT_TERMINA 251 FIXED(UAC_VERSION_2, UAC_INPUT_TERMINAL,
252 struct uac2_input_terminal_descr 252 struct uac2_input_terminal_descriptor),
253 FIXED(UAC_VERSION_2, UAC_OUTPUT_TERMIN 253 FIXED(UAC_VERSION_2, UAC_OUTPUT_TERMINAL,
254 struct uac2_output_terminal_desc 254 struct uac2_output_terminal_descriptor),
255 FUNC(UAC_VERSION_2, UAC_MIXER_UNIT, va 255 FUNC(UAC_VERSION_2, UAC_MIXER_UNIT, validate_mixer_unit),
256 FUNC(UAC_VERSION_2, UAC_SELECTOR_UNIT, 256 FUNC(UAC_VERSION_2, UAC_SELECTOR_UNIT, validate_selector_unit),
257 FUNC(UAC_VERSION_2, UAC_FEATURE_UNIT, 257 FUNC(UAC_VERSION_2, UAC_FEATURE_UNIT, validate_uac2_feature_unit),
258 /* UAC_VERSION_2, UAC2_EFFECT_UNIT: no 258 /* UAC_VERSION_2, UAC2_EFFECT_UNIT: not implemented yet */
259 FUNC(UAC_VERSION_2, UAC2_PROCESSING_UN 259 FUNC(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2, validate_processing_unit),
260 FUNC(UAC_VERSION_2, UAC2_EXTENSION_UNI 260 FUNC(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2, validate_processing_unit),
261 FIXED(UAC_VERSION_2, UAC2_CLOCK_SOURCE 261 FIXED(UAC_VERSION_2, UAC2_CLOCK_SOURCE,
262 struct uac_clock_source_descript 262 struct uac_clock_source_descriptor),
263 FUNC(UAC_VERSION_2, UAC2_CLOCK_SELECTO 263 FUNC(UAC_VERSION_2, UAC2_CLOCK_SELECTOR, validate_selector_unit),
264 FIXED(UAC_VERSION_2, UAC2_CLOCK_MULTIP 264 FIXED(UAC_VERSION_2, UAC2_CLOCK_MULTIPLIER,
265 struct uac_clock_multiplier_desc 265 struct uac_clock_multiplier_descriptor),
266 /* UAC_VERSION_2, UAC2_SAMPLE_RATE_CON 266 /* UAC_VERSION_2, UAC2_SAMPLE_RATE_CONVERTER: not implemented yet */
267 267
268 /* UAC3 */ 268 /* UAC3 */
269 FIXED(UAC_VERSION_2, UAC_HEADER, struc 269 FIXED(UAC_VERSION_2, UAC_HEADER, struct uac3_ac_header_descriptor),
270 FIXED(UAC_VERSION_3, UAC_INPUT_TERMINA 270 FIXED(UAC_VERSION_3, UAC_INPUT_TERMINAL,
271 struct uac3_input_terminal_descr 271 struct uac3_input_terminal_descriptor),
272 FIXED(UAC_VERSION_3, UAC_OUTPUT_TERMIN 272 FIXED(UAC_VERSION_3, UAC_OUTPUT_TERMINAL,
273 struct uac3_output_terminal_desc 273 struct uac3_output_terminal_descriptor),
274 /* UAC_VERSION_3, UAC3_EXTENDED_TERMIN 274 /* UAC_VERSION_3, UAC3_EXTENDED_TERMINAL: not implemented yet */
275 FUNC(UAC_VERSION_3, UAC3_MIXER_UNIT, v 275 FUNC(UAC_VERSION_3, UAC3_MIXER_UNIT, validate_mixer_unit),
276 FUNC(UAC_VERSION_3, UAC3_SELECTOR_UNIT 276 FUNC(UAC_VERSION_3, UAC3_SELECTOR_UNIT, validate_selector_unit),
277 FUNC(UAC_VERSION_3, UAC_FEATURE_UNIT, 277 FUNC(UAC_VERSION_3, UAC_FEATURE_UNIT, validate_uac3_feature_unit),
278 /* UAC_VERSION_3, UAC3_EFFECT_UNIT: n 278 /* UAC_VERSION_3, UAC3_EFFECT_UNIT: not implemented yet */
279 FUNC(UAC_VERSION_3, UAC3_PROCESSING_UN 279 FUNC(UAC_VERSION_3, UAC3_PROCESSING_UNIT, validate_processing_unit),
280 FUNC(UAC_VERSION_3, UAC3_EXTENSION_UNI 280 FUNC(UAC_VERSION_3, UAC3_EXTENSION_UNIT, validate_processing_unit),
281 FIXED(UAC_VERSION_3, UAC3_CLOCK_SOURCE 281 FIXED(UAC_VERSION_3, UAC3_CLOCK_SOURCE,
282 struct uac3_clock_source_descrip 282 struct uac3_clock_source_descriptor),
283 FUNC(UAC_VERSION_3, UAC3_CLOCK_SELECTO 283 FUNC(UAC_VERSION_3, UAC3_CLOCK_SELECTOR, validate_selector_unit),
284 FIXED(UAC_VERSION_3, UAC3_CLOCK_MULTIP 284 FIXED(UAC_VERSION_3, UAC3_CLOCK_MULTIPLIER,
285 struct uac3_clock_multiplier_des 285 struct uac3_clock_multiplier_descriptor),
286 /* UAC_VERSION_3, UAC3_SAMPLE_RATE_CON 286 /* UAC_VERSION_3, UAC3_SAMPLE_RATE_CONVERTER: not implemented yet */
287 /* UAC_VERSION_3, UAC3_CONNECTORS: not 287 /* UAC_VERSION_3, UAC3_CONNECTORS: not implemented yet */
288 { } /* terminator */ 288 { } /* terminator */
289 }; 289 };
290 290
291 static const struct usb_desc_validator midi_va 291 static const struct usb_desc_validator midi_validators[] = {
292 FIXED(UAC_VERSION_ALL, USB_MS_HEADER, 292 FIXED(UAC_VERSION_ALL, USB_MS_HEADER,
293 struct usb_ms_header_descriptor) 293 struct usb_ms_header_descriptor),
294 FIXED(UAC_VERSION_ALL, USB_MS_MIDI_IN_ 294 FIXED(UAC_VERSION_ALL, USB_MS_MIDI_IN_JACK,
295 struct usb_midi_in_jack_descript 295 struct usb_midi_in_jack_descriptor),
296 FUNC(UAC_VERSION_ALL, USB_MS_MIDI_OUT_ 296 FUNC(UAC_VERSION_ALL, USB_MS_MIDI_OUT_JACK,
297 validate_midi_out_jack), 297 validate_midi_out_jack),
298 { } /* terminator */ 298 { } /* terminator */
299 }; 299 };
300 300
301 301
302 /* Validate the given unit descriptor, return 302 /* Validate the given unit descriptor, return true if it's OK */
303 static bool validate_desc(unsigned char *hdr, 303 static bool validate_desc(unsigned char *hdr, int protocol,
304 const struct usb_des 304 const struct usb_desc_validator *v)
305 { 305 {
306 if (hdr[1] != USB_DT_CS_INTERFACE) 306 if (hdr[1] != USB_DT_CS_INTERFACE)
307 return true; /* don't care */ 307 return true; /* don't care */
308 308
309 for (; v->type; v++) { 309 for (; v->type; v++) {
310 if (v->type == hdr[2] && 310 if (v->type == hdr[2] &&
311 (v->protocol == UAC_VERSIO 311 (v->protocol == UAC_VERSION_ALL ||
312 v->protocol == protocol)) 312 v->protocol == protocol)) {
313 if (v->func) 313 if (v->func)
314 return v->func 314 return v->func(hdr, v);
315 /* check for the fixed 315 /* check for the fixed size */
316 return hdr[0] >= v->si 316 return hdr[0] >= v->size;
317 } 317 }
318 } 318 }
319 319
320 return true; /* not matching, skip val 320 return true; /* not matching, skip validation */
321 } 321 }
322 322
323 bool snd_usb_validate_audio_desc(void *p, int 323 bool snd_usb_validate_audio_desc(void *p, int protocol)
324 { 324 {
325 unsigned char *c = p; !! 325 return validate_desc(p, protocol, audio_validators);
326 bool valid; <<
327 <<
328 valid = validate_desc(p, protocol, aud <<
329 if (!valid && snd_usb_skip_validation) <<
330 print_hex_dump(KERN_ERR, "USB- <<
331 DUMP_PREFIX_NON <<
332 valid = true; <<
333 } <<
334 return valid; <<
335 } 326 }
336 327
337 bool snd_usb_validate_midi_desc(void *p) 328 bool snd_usb_validate_midi_desc(void *p)
338 { 329 {
339 unsigned char *c = p; !! 330 return validate_desc(p, UAC_VERSION_1, midi_validators);
340 bool valid; <<
341 <<
342 valid = validate_desc(p, UAC_VERSION_1 <<
343 if (!valid && snd_usb_skip_validation) <<
344 print_hex_dump(KERN_ERR, "USB- <<
345 DUMP_PREFIX_NON <<
346 valid = true; <<
347 } <<
348 return valid; <<
349 } 331 }
>> 332
350 333
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