1/// If list_for_each_entry, etc complete a traversal of the list, the iterator
2/// variable ends up pointing to an address at an offset from the list head,
3/// and not a meaningful structure.  Thus this value should not be used after
4/// the end of the iterator.
5//#False positives arise when there is a goto in the iterator and the
6//#reported reference is at the label of this goto.  Some flag tests
7//#may also cause a report to be a false positive.
8///
9// Confidence: Moderate
10// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
11// Copyright: (C) 2012 Gilles Muller, INRIA/LIP6.  GPLv2.
12// URL: http://coccinelle.lip6.fr/
13// Comments:
14// Options: --no-includes --include-headers
15
16virtual context
17virtual org
18virtual report
19
20@r exists@
21identifier c,member;
22expression E,x;
23iterator name list_for_each_entry;
24iterator name list_for_each_entry_reverse;
25iterator name list_for_each_entry_continue;
26iterator name list_for_each_entry_continue_reverse;
27iterator name list_for_each_entry_from;
28iterator name list_for_each_entry_safe;
29iterator name list_for_each_entry_safe_continue;
30iterator name list_for_each_entry_safe_from;
31iterator name list_for_each_entry_safe_reverse;
32iterator name hlist_for_each_entry;
33iterator name hlist_for_each_entry_continue;
34iterator name hlist_for_each_entry_from;
35iterator name hlist_for_each_entry_safe;
36statement S;
37position p1,p2;
38@@
39
40(
41list_for_each_entry@p1(c,...,member) { ... when != break;
42                                 when forall
43                                 when strict
44}
45|
46list_for_each_entry_reverse@p1(c,...,member) { ... when != break;
47                                 when forall
48                                 when strict
49}
50|
51list_for_each_entry_continue@p1(c,...,member) { ... when != break;
52                                 when forall
53                                 when strict
54}
55|
56list_for_each_entry_continue_reverse@p1(c,...,member) { ... when != break;
57                                 when forall
58                                 when strict
59}
60|
61list_for_each_entry_from@p1(c,...,member) { ... when != break;
62                                 when forall
63                                 when strict
64}
65|
66list_for_each_entry_safe@p1(c,...,member) { ... when != break;
67                                 when forall
68                                 when strict
69}
70|
71list_for_each_entry_safe_continue@p1(c,...,member) { ... when != break;
72                                 when forall
73                                 when strict
74}
75|
76list_for_each_entry_safe_from@p1(c,...,member) { ... when != break;
77                                 when forall
78                                 when strict
79}
80|
81list_for_each_entry_safe_reverse@p1(c,...,member) { ... when != break;
82                                 when forall
83                                 when strict
84}
85)
86...
87(
88list_for_each_entry(c,...) S
89|
90list_for_each_entry_reverse(c,...) S
91|
92list_for_each_entry_continue(c,...) S
93|
94list_for_each_entry_continue_reverse(c,...) S
95|
96list_for_each_entry_from(c,...) S
97|
98list_for_each_entry_safe(c,...) S
99|
100list_for_each_entry_safe(x,c,...) S
101|
102list_for_each_entry_safe_continue(c,...) S
103|
104list_for_each_entry_safe_continue(x,c,...) S
105|
106list_for_each_entry_safe_from(c,...) S
107|
108list_for_each_entry_safe_from(x,c,...) S
109|
110list_for_each_entry_safe_reverse(c,...) S
111|
112list_for_each_entry_safe_reverse(x,c,...) S
113|
114hlist_for_each_entry(c,...) S
115|
116hlist_for_each_entry_continue(c,...) S
117|
118hlist_for_each_entry_from(c,...) S
119|
120hlist_for_each_entry_safe(c,...) S
121|
122list_remove_head(x,c,...)
123|
124sizeof(<+...c...+>)
125|
126 &c->member
127|
128c = E
129|
130*c@p2
131)
132
133@script:python depends on org@
134p1 << r.p1;
135p2 << r.p2;
136@@
137
138cocci.print_main("invalid iterator index reference",p2)
139cocci.print_secs("iterator",p1)
140
141@script:python depends on report@
142p1 << r.p1;
143p2 << r.p2;
144@@
145
146msg = "ERROR: invalid reference to the index variable of the iterator on line %s" % (p1[0].line)
147coccilib.report.print_report(p2[0], msg)
148