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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 /drivers/media | |
| parent | c6e56cd344da17134f3d57247d52eaf640107087 (diff) | |
| download | linux-d2be76437c20161a31460306e555bb546e30dfc7.tar.gz linux-d2be76437c20161a31460306e555bb546e30dfc7.tar.bz2 linux-d2be76437c20161a31460306e555bb546e30dfc7.zip | |
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 'drivers/media')
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 5b757f32d997..f960e8ea4f17 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -124,13 +124,14 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream, int ret; size = stream->dev->uvc_version >= 0x0110 ? 34 : 26; + if ((stream->dev->quirks & UVC_QUIRK_PROBE_DEF) && + query == UVC_GET_DEF) + return -EIO; + data = kmalloc(size, GFP_KERNEL); if (data == NULL) return -ENOMEM; - if ((stream->dev->quirks & UVC_QUIRK_PROBE_DEF) && query == UVC_GET_DEF) - return -EIO; - ret = __uvc_query_ctrl(stream->dev, query, 0, stream->intfnum, probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data, size, UVC_CTRL_STREAMING_TIMEOUT); |