diff options
| author | Julia Lawall <julia@diku.dk> | 2010-08-27 02:57:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-10-21 01:04:53 -0200 |
| commit | 6b81bef8cde141d8d8172a35633af27e17cf487a (patch) | |
| tree | acf25b15739555f54828e6a1f7cb9197ca908b32 /drivers | |
| parent | d7ef485daa657456cad4994873148377b3561b8b (diff) | |
V4L/DVB: drivers/media/video/em28xx: Remove potential NULL dereference
If the NULL test is necessary, the initialization involving a dereference of
the tested value should be moved after the NULL test.
The sematic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@
- T i = E->fld;
+ T i;
... when != E
when != i
if (E == NULL) S
+ i = E->fld;
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 7b9ec6e493e..95a4b60a1ed 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -277,12 +277,13 @@ static void em28xx_copy_vbi(struct em28xx *dev, { void *startwrite, *startread; int offset; - int bytesperline = dev->vbi_width; + int bytesperline; if (dev == NULL) { em28xx_isocdbg("dev is null\n"); return; } + bytesperline = dev->vbi_width; if (dma_q == NULL) { em28xx_isocdbg("dma_q is null\n"); |