1// SPDX-License-Identifier: GPL-2.0-only
2/// Use kmemdup rather than duplicating its implementation
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
12virtual patch
13virtual context
14virtual org
15virtual report
16
17@r1@
18expression from,to;
19expression flag;
20position p;
21@@
22
23   to = \(kmalloc@p\|kzalloc@p\)(strlen(from) + 1,flag);
24
25@r2@
26expression x,from,to;
27expression flag,E1;
28position p;
29@@
30
31    x = strlen(from) + 1;
32    ... when != \( x = E1 \| from = E1 \)
33    to = \(kmalloc@p\|kzalloc@p\)(x,flag);
34
35@depends on patch@
36expression from,to,size,flag;
37position p != {r1.p,r2.p};
38statement S;
39@@
40
41-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
42+  to = kmemdup(from,size,flag);
43   if (to==NULL || ...) S
44-  memcpy(to, from, size);
45
46@r depends on !patch@
47expression from,to,size,flag;
48position p != {r1.p,r2.p};
49statement S;
50@@
51
52*  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
53   if (to==NULL || ...) S
54*  memcpy(to, from, size);
55
56@script:python depends on org@
57p << r.p;
58@@
59
60coccilib.org.print_todo(p[0], "WARNING opportunity for kmemdup")
61
62@script:python depends on report@
63p << r.p;
64@@
65
66coccilib.report.print_report(p[0], "WARNING opportunity for kmemdup")
67