1 // SPDX-License-Identifier: GPL-2.0-only
2 /// The various basic memory allocation functions don't return ERR_PTR
3 ///
4 // Confidence: High
5 // Copyright: (C) 2010-2012 Nicolas Palix.
6 // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
7 // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
8 // URL: https://coccinelle.gitlabpages.inria.fr/website
9 // Comments:
10 // Options: --no-includes --include-headers
11
12 virtual patch
13 virtual context
14 virtual org
15 virtual report
16
17 @depends on patch@
18 expression x,E;
19 @@
20
21 x = \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)
22 ... when != x = E
23 - IS_ERR(x)
24 + !x
25
26 @r depends on !patch exists@
27 expression x,E;
28 position p1,p2;
29 @@
30
31 *x = \(kmalloc@p1\|kzalloc@p1\|kcalloc@p1\|kmem_cache_alloc@p1\|kmem_cache_zalloc@p1\|kmem_cache_alloc_node@p1\|kmalloc_node@p1\|kzalloc_node@p1\)(...)
32 ... when != x = E
33 * IS_ERR@p2(x)
34
35 @script:python depends on org@
36 p1 << r.p1;
37 p2 << r.p2;
38 @@
39
40 cocci.print_main("alloc call",p1)
41 cocci.print_secs("IS_ERR that should be NULL tests",p2)
42
43 @script:python depends on report@
44 p1 << r.p1;
45 p2 << r.p2;
46 @@
47
48 msg = "ERROR: allocation function on line %s returns NULL not ERR_PTR on failure" % (p1[0].line)
49 coccilib.report.print_report(p2[0], msg)
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