1/// PTR_ERR should be applied before its argument is reassigned, typically
2/// to NULL
3///
4// Confidence: High
5// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
6// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
7// URL: http://coccinelle.lip6.fr/
8// Comments:
9// Options: --no-includes --include-headers
10
11virtual org
12virtual report
13virtual context
14
15@r exists@
16expression e,e1;
17constant c;
18position p1,p2;
19@@
20
21*e@p1 = c
22... when != e = e1
23    when != &e
24    when != true IS_ERR(e)
25*PTR_ERR@p2(e)
26
27@script:python depends on org@
28p1 << r.p1;
29p2 << r.p2;
30@@
31
32cocci.print_main("PTR_ERR",p2)
33cocci.print_secs("assignment",p1)
34
35@script:python depends on report@
36p1 << r.p1;
37p2 << r.p2;
38@@
39
40msg = "ERROR: PTR_ERR applied after initialization to constant on line %s" % (p1[0].line)
41coccilib.report.print_report(p2[0],msg)
42