summaryrefslogtreecommitdiff
path: root/scripts/coccinelle/tests/odd_ptr_err.cocci
blob: 11d4e2b6deb8bbfabd0174bdbb03c67532807eda (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
// SPDX-License-Identifier: GPL-2.0-only
/// PTR_ERR should access the value just tested by IS_ERR
//# There can be false positives in the patch case, where it is the call to
//# IS_ERR that is wrong.
///
// Confidence: High
// Copyright: (C) 2012, 2015 Julia Lawall, INRIA.
// Copyright: (C) 2012, 2015 Gilles Muller, INRIA.
// URL: http://coccinelle.lip6.fr/
// Options: --no-includes --include-headers

virtual patch
virtual context
virtual org
virtual report

@ok1 exists@
expression x,e;
position p;
@@

if (IS_ERR(x=e) || ...) {
  <...
   PTR_ERR@p(x)
  ...>
}

@ok2 exists@
expression x,e1,e2;
position p;
@@

if (IS_ERR(x) || ...) {
  <...
(
   PTR_ERR@p(\(e1 ? e2 : x\|e1 ? x : e2\))
|
   PTR_ERR@p(x)
)
  ...>
}

@r1 depends on patch && !context && !org && !report exists@
expression x,y;
position p != {ok1.p,ok2.p};
@@

if (IS_ERR(x) || ...) {
  ... when any
      when != IS_ERR(...)
(
  PTR_ERR(x)
|
  PTR_ERR@p(
-     y
+     x
  )
)
  ... when any
}

// ----------------------------------------------------------------------------

@r1_context depends on !patch && (context || org || report) exists@
position p != {ok1.p,ok2.p};
expression x, y;
position j0, j1;
@@

if (IS_ERR@j0(x) || ...) {
  ... when any
      when != IS_ERR(...)
(
  PTR_ERR(x)
|
  PTR_ERR@j1@p(
     y
  )
)
  ... when any
}

@r1_disj depends on !patch && (context || org || report) exists@
position p != {ok1.p,ok2.p};
expression x, y;
position r1_context.j0, r1_context.j1;
@@

* if (IS_ERR@j0(x) || ...) {
  ... when any
      when != IS_ERR(...)
*   PTR_ERR@j1@p(
     y
  )
  ... when any
}

// ----------------------------------------------------------------------------

@script:python r1_org depends on org@
j0 << r1_context.j0;
j1 << r1_context.j1;
@@

msg = "inconsistent IS_ERR and PTR_ERR"
coccilib.org.print_todo(j0[0], msg)
coccilib.org.print_link(j1[0], "")

// ----------------------------------------------------------------------------

@script:python r1_report depends on report@
j0 << r1_context.j0;
j1 << r1_context.j1;
@@

msg = "inconsistent IS_ERR and PTR_ERR on line %s." % (j1[0].line)
coccilib.report.print_report(j0[0], msg)