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-rw-r--r--scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci67
-rw-r--r--scripts/coccinelle/api/alloc/kzalloc-simple.cocci86
-rw-r--r--scripts/coccinelle/api/err_cast.cocci56
-rw-r--r--scripts/coccinelle/api/kstrdup.cocci39
-rw-r--r--scripts/coccinelle/api/memdup.cocci40
-rw-r--r--scripts/coccinelle/api/memdup_user.cocci35
-rw-r--r--scripts/coccinelle/api/resource_size.cocci93
7 files changed, 416 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci b/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci
new file mode 100644
index 000000000000..7d4771d449c3
--- /dev/null
+++ b/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci
@@ -0,0 +1,67 @@
1///
2/// Casting (void *) value returned by kmalloc is useless
3/// as mentioned in Documentation/CodingStyle, Chap 14.
4///
5// Confidence: High
6// Copyright: 2009,2010 Nicolas Palix, DIKU. GPLv2.
7// URL: http://coccinelle.lip6.fr/
8// Options: -no_includes -include_headers
9//
10// Keywords: kmalloc, kzalloc, kcalloc
11// Version min: < 2.6.12 kmalloc
12// Version min: < 2.6.12 kcalloc
13// Version min: 2.6.14 kzalloc
14//
15
16virtual context
17virtual patch
18virtual org
19virtual report
20
21//----------------------------------------------------------
22// For context mode
23//----------------------------------------------------------
24
25@depends on context@
26type T;
27@@
28
29* (T *)
30 \(kmalloc\|kzalloc\|kcalloc\)(...)
31
32//----------------------------------------------------------
33// For patch mode
34//----------------------------------------------------------
35
36@depends on patch@
37type T;
38@@
39
40- (T *)
41 \(kmalloc\|kzalloc\|kcalloc\)(...)
42
43//----------------------------------------------------------
44// For org and report mode
45//----------------------------------------------------------
46
47@r depends on org || report@
48type T;
49position p;
50@@
51
52 (T@p *)\(kmalloc\|kzalloc\|kcalloc\)(...)
53
54@script:python depends on org@
55p << r.p;
56t << r.T;
57@@
58
59coccilib.org.print_safe_todo(p[0], t)
60
61@script:python depends on report@
62p << r.p;
63t << r.T;
64@@
65
66msg="WARNING: casting value returned by k[cmz]alloc to (%s *) is useless." % (t)
67coccilib.report.print_report(p[0], msg)
diff --git a/scripts/coccinelle/api/alloc/kzalloc-simple.cocci b/scripts/coccinelle/api/alloc/kzalloc-simple.cocci
new file mode 100644
index 000000000000..046b9b16f8f9
--- /dev/null
+++ b/scripts/coccinelle/api/alloc/kzalloc-simple.cocci
@@ -0,0 +1,86 @@
1///
2/// Use kzalloc rather than kmalloc followed by memset with 0
3///
4/// This considers some simple cases that are common and easy to validate
5/// Note in particular that there are no ...s in the rule, so all of the
6/// matched code has to be contiguous
7///
8// Confidence: High
9// Copyright: (C) 2009-2010 Julia Lawall, Nicolas Palix, DIKU. GPLv2.
10// Copyright: (C) 2009-2010 Gilles Muller, INRIA/LiP6. GPLv2.
11// URL: http://coccinelle.lip6.fr/rules/kzalloc.html
12// Options: -no_includes -include_headers
13//
14// Keywords: kmalloc, kzalloc
15// Version min: < 2.6.12 kmalloc
16// Version min: 2.6.14 kzalloc
17//
18
19virtual context
20virtual patch
21virtual org
22virtual report
23
24//----------------------------------------------------------
25// For context mode
26//----------------------------------------------------------
27
28@depends on context@
29type T, T2;
30expression x;
31expression E1,E2;
32statement S;
33@@
34
35* x = (T)kmalloc(E1,E2);
36 if ((x==NULL) || ...) S
37* memset((T2)x,0,E1);
38
39//----------------------------------------------------------
40// For patch mode
41//----------------------------------------------------------
42
43@depends on patch@
44type T, T2;
45expression x;
46expression E1,E2;
47statement S;
48@@
49
50- x = (T)kmalloc(E1,E2);
51+ x = kzalloc(E1,E2);
52 if ((x==NULL) || ...) S
53- memset((T2)x,0,E1);
54
55//----------------------------------------------------------
56// For org mode
57//----------------------------------------------------------
58
59@r depends on org || report@
60type T, T2;
61expression x;
62expression E1,E2;
63statement S;
64position p;
65@@
66
67 x = (T)kmalloc@p(E1,E2);
68 if ((x==NULL) || ...) S
69 memset((T2)x,0,E1);
70
71@script:python depends on org@
72p << r.p;
73x << r.x;
74@@
75
76msg="%s" % (x)
77msg_safe=msg.replace("[","@(").replace("]",")")
78coccilib.org.print_todo(p[0], msg_safe)
79
80@script:python depends on report@
81p << r.p;
82x << r.x;
83@@
84
85msg="WARNING: kzalloc should be used for %s, instead of kmalloc/memset" % (x)
86coccilib.report.print_report(p[0], msg)
diff --git a/scripts/coccinelle/api/err_cast.cocci b/scripts/coccinelle/api/err_cast.cocci
new file mode 100644
index 000000000000..2ce115000af6
--- /dev/null
+++ b/scripts/coccinelle/api/err_cast.cocci
@@ -0,0 +1,56 @@
1///
2/// Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(...))
3///
4// Confidence: High
5// Copyright: (C) 2009, 2010 Nicolas Palix, DIKU. GPLv2.
6// Copyright: (C) 2009, 2010 Julia Lawall, DIKU. GPLv2.
7// Copyright: (C) 2009, 2010 Gilles Muller, INRIA/LiP6. GPLv2.
8// URL: http://coccinelle.lip6.fr/
9// Options:
10//
11// Keywords: ERR_PTR, PTR_ERR, ERR_CAST
12// Version min: 2.6.25
13//
14
15virtual context
16virtual patch
17virtual org
18virtual report
19
20
21@ depends on context && !patch && !org && !report@
22expression x;
23@@
24
25* ERR_PTR(PTR_ERR(x))
26
27@ depends on !context && patch && !org && !report @
28expression x;
29@@
30
31- ERR_PTR(PTR_ERR(x))
32+ ERR_CAST(x)
33
34@r depends on !context && !patch && (org || report)@
35expression x;
36position p;
37@@
38
39 ERR_PTR@p(PTR_ERR(x))
40
41@script:python depends on org@
42p << r.p;
43x << r.x;
44@@
45
46msg="WARNING ERR_CAST can be used with %s" % (x)
47msg_safe=msg.replace("[","@(").replace("]",")")
48coccilib.org.print_todo(p[0], msg_safe)
49
50@script:python depends on report@
51p << r.p;
52x << r.x;
53@@
54
55msg="WARNING: ERR_CAST can be used with %s" % (x)
56coccilib.report.print_report(p[0], msg)
diff --git a/scripts/coccinelle/api/kstrdup.cocci b/scripts/coccinelle/api/kstrdup.cocci
new file mode 100644
index 000000000000..e0805ad08d39
--- /dev/null
+++ b/scripts/coccinelle/api/kstrdup.cocci
@@ -0,0 +1,39 @@
1/// Use kstrdup rather than duplicating its implementation
2///
3// Confidence: High
4// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
5// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
6// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
7// URL: http://coccinelle.lip6.fr/
8// Comments:
9// Options: -no_includes -include_headers
10
11virtual patch
12
13@@
14expression from,to;
15expression flag,E1,E2;
16statement S;
17@@
18
19- to = kmalloc(strlen(from) + 1,flag);
20+ to = kstrdup(from, flag);
21 ... when != \(from = E1 \| to = E1 \)
22 if (to==NULL || ...) S
23 ... when != \(from = E2 \| to = E2 \)
24- strcpy(to, from);
25
26@@
27expression x,from,to;
28expression flag,E1,E2,E3;
29statement S;
30@@
31
32- x = strlen(from) + 1;
33 ... when != \( x = E1 \| from = E1 \)
34- to = \(kmalloc\|kzalloc\)(x,flag);
35+ to = kstrdup(from, flag);
36 ... when != \(x = E2 \| from = E2 \| to = E2 \)
37 if (to==NULL || ...) S
38 ... when != \(x = E3 \| from = E3 \| to = E3 \)
39- memcpy(to, from, x);
diff --git a/scripts/coccinelle/api/memdup.cocci b/scripts/coccinelle/api/memdup.cocci
new file mode 100644
index 000000000000..b5d722077dc1
--- /dev/null
+++ b/scripts/coccinelle/api/memdup.cocci
@@ -0,0 +1,40 @@
1/// Use kmemdup rather than duplicating its implementation
2///
3// Confidence: High
4// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
5// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
6// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
7// URL: http://coccinelle.lip6.fr/
8// Comments:
9// Options: -no_includes -include_headers
10
11virtual patch
12
13@r1@
14expression from,to;
15expression flag;
16position p;
17@@
18
19 to = \(kmalloc@p\|kzalloc@p\)(strlen(from) + 1,flag);
20
21@r2@
22expression x,from,to;
23expression flag,E1;
24position p;
25@@
26
27 x = strlen(from) + 1;
28 ... when != \( x = E1 \| from = E1 \)
29 to = \(kmalloc@p\|kzalloc@p\)(x,flag);
30
31@@
32expression from,to,size,flag;
33position p != {r1.p,r2.p};
34statement S;
35@@
36
37- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
38+ to = kmemdup(from,size,flag);
39 if (to==NULL || ...) S
40- memcpy(to, from, size);
diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci
new file mode 100644
index 000000000000..72ce012e878a
--- /dev/null
+++ b/scripts/coccinelle/api/memdup_user.cocci
@@ -0,0 +1,35 @@
1/// Use kmemdup_user rather than duplicating its implementation
2/// This is a little bit restricted to reduce false positives
3///
4// Confidence: High
5// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
6// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
7// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
8// URL: http://coccinelle.lip6.fr/
9// Comments:
10// Options: -no_includes -include_headers
11
12virtual patch
13
14@@
15expression from,to,size,flag;
16position p;
17identifier l1,l2;
18@@
19
20- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
21+ to = memdup_user(from,size);
22 if (
23- to==NULL
24+ IS_ERR(to)
25 || ...) {
26 <+... when != goto l1;
27- -ENOMEM
28+ PTR_ERR(to)
29 ...+>
30 }
31- if (copy_from_user(to, from, size) != 0) {
32- <+... when != goto l2;
33- -EFAULT
34- ...+>
35- }
diff --git a/scripts/coccinelle/api/resource_size.cocci b/scripts/coccinelle/api/resource_size.cocci
new file mode 100644
index 000000000000..1935a58b39d9
--- /dev/null
+++ b/scripts/coccinelle/api/resource_size.cocci
@@ -0,0 +1,93 @@
1///
2/// Use resource_size function on resource object
3/// instead of explicit computation.
4///
5// Confidence: High
6// Copyright: (C) 2009, 2010 Nicolas Palix, DIKU. GPLv2.
7// Copyright: (C) 2009, 2010 Julia Lawall, DIKU. GPLv2.
8// Copyright: (C) 2009, 2010 Gilles Muller, INRIA/LiP6. GPLv2.
9// URL: http://coccinelle.lip6.fr/
10// Options:
11//
12// Keywords: resource_size
13// Version min: 2.6.27 resource_size
14//
15
16virtual context
17virtual patch
18virtual org
19virtual report
20
21//----------------------------------------------------------
22// For context mode
23//----------------------------------------------------------
24
25@r_context depends on context && !patch && !org@
26struct resource *res;
27@@
28
29* (res->end - res->start) + 1
30
31//----------------------------------------------------------
32// For patch mode
33//----------------------------------------------------------
34
35@r_patch depends on !context && patch && !org@
36struct resource *res;
37@@
38
39- (res->end - res->start) + 1
40+ resource_size(res)
41
42//----------------------------------------------------------
43// For org mode
44//----------------------------------------------------------
45
46
47@r_org depends on !context && !patch && (org || report)@
48struct resource *res;
49position p;
50@@
51
52 (res->end@p - res->start) + 1
53
54@rbad_org depends on !context && !patch && (org || report)@
55struct resource *res;
56position p != r_org.p;
57@@
58
59 res->end@p - res->start
60
61@script:python depends on org@
62p << r_org.p;
63x << r_org.res;
64@@
65
66msg="ERROR with %s" % (x)
67msg_safe=msg.replace("[","@(").replace("]",")")
68coccilib.org.print_todo(p[0], msg_safe)
69
70@script:python depends on report@
71p << r_org.p;
72x << r_org.res;
73@@
74
75msg="ERROR: Missing resource_size with %s" % (x)
76coccilib.report.print_report(p[0], msg)
77
78@script:python depends on org@
79p << rbad_org.p;
80x << rbad_org.res;
81@@
82
83msg="WARNING with %s" % (x)
84msg_safe=msg.replace("[","@(").replace("]",")")
85coccilib.org.print_todo(p[0], msg_safe)
86
87@script:python depends on report@
88p << rbad_org.p;
89x << rbad_org.res;
90@@
91
92msg="WARNING: Suspicious code. resource_size is maybe missing with %s" % (x)
93coccilib.report.print_report(p[0], msg)
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-29 11:00:34 -0400