61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
/// Use memdup_user rather than duplicating its implementation
|
|
/// This is a little bit restricted to reduce false positives
|
|
///
|
|
// Confidence: High
|
|
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
|
|
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
|
|
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
|
|
// URL: http://coccinelle.lip6.fr/
|
|
// Comments:
|
|
// Options: --no-includes --include-headers
|
|
|
|
virtual patch
|
|
virtual context
|
|
virtual org
|
|
virtual report
|
|
|
|
@depends on patch@
|
|
expression from,to,size;
|
|
identifier l1,l2;
|
|
@@
|
|
|
|
- to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL);
|
|
+ to = memdup_user(from,size);
|
|
if (
|
|
- to==NULL
|
|
+ IS_ERR(to)
|
|
|| ...) {
|
|
<+... when != goto l1;
|
|
- -ENOMEM
|
|
+ PTR_ERR(to)
|
|
...+>
|
|
}
|
|
- if (copy_from_user(to, from, size) != 0) {
|
|
- <+... when != goto l2;
|
|
- -EFAULT
|
|
- ...+>
|
|
- }
|
|
|
|
@r depends on !patch@
|
|
expression from,to,size;
|
|
position p;
|
|
statement S1,S2;
|
|
@@
|
|
|
|
* to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL);
|
|
if (to==NULL || ...) S1
|
|
if (copy_from_user(to, from, size) != 0)
|
|
S2
|
|
|
|
@script:python depends on org@
|
|
p << r.p;
|
|
@@
|
|
|
|
coccilib.org.print_todo(p[0], "WARNING opportunity for memdup_user")
|
|
|
|
@script:python depends on report@
|
|
p << r.p;
|
|
@@
|
|
|
|
coccilib.report.print_report(p[0], "WARNING opportunity for memdup_user")
|