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author | Julia Lawall <julia@diku.dk> | 2009-09-17 23:44:01 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-19 00:52:54 -0300 |
commit | d2be76437c20161a31460306e555bb546e30dfc7 (patch) | |
tree | 467a58d5e0328196b7c038ef5ba7fc8ad9386db2 /Documentation/video4linux | |
parent | c6e56cd344da17134f3d57247d52eaf640107087 (diff) | |
download | op-kernel-dev-d2be76437c20161a31460306e555bb546e30dfc7.zip op-kernel-dev-d2be76437c20161a31460306e555bb546e30dfc7.tar.gz |
V4L/DVB (13012): uvc: introduce missing kfree
Move the kzalloc and associated test after the stream/query test, to avoid
the need to free the allocated if the stream/query test fails.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
when != if (...) { <+...x...+> }
(
x->f1 = E
|
(x->f1 == NULL || ...)
|
f(...,x->f1,...)
)
...>
(
return \(0\|<+...x...+>\|ptr\);
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/video4linux')
0 files changed, 0 insertions, 0 deletions