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authorAndy Walls <awalls@radix.net>2008-05-12 15:01:27 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-05-14 02:56:45 -0300
commit07c87a833e9ef92280ed24ab85cd4eb49cbca9c0 (patch)
tree58ba6654998600742c352f12ed5ed1967e1f598e /drivers
parentcba627a51a26eaed3526c423f5fd0410dd721ae2 (diff)
V4L/DVB (7891): cx18/ivtv: fix open() kernel oops
Upon error conditions in cx18/ivtv_probe(), the code at the 'err:' label leaves a NULL entry in cx18/ivtv_cards[]. This can cause a NULL pointer de-reference in cx18/ivtv_v4l2_open() which is fixed by this patch. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/cx18/cx18-fileops.c2
-rw-r--r--drivers/media/video/ivtv/ivtv-fileops.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c
index 91eff6e671a..0b3141db174 100644
--- a/drivers/media/video/cx18/cx18-fileops.c
+++ b/drivers/media/video/cx18/cx18-fileops.c
@@ -662,6 +662,8 @@ int cx18_v4l2_open(struct inode *inode, struct file *filp)
for (x = 0; cx == NULL && x < cx18_cards_active; x++) {
/* find out which stream this open was on */
for (y = 0; y < CX18_MAX_STREAMS; y++) {
+ if (cx18_cards[x] == NULL)
+ continue;
s = &cx18_cards[x]->streams[y];
if (s->v4l2dev && s->v4l2dev->minor == minor) {
cx = cx18_cards[x];
diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index 2b74b0ab147..f2fa434b677 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -987,6 +987,8 @@ int ivtv_v4l2_open(struct inode *inode, struct file *filp)
/* Find which card this open was on */
spin_lock(&ivtv_cards_lock);
for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
+ if (ivtv_cards[x] == NULL)
+ continue;
/* find out which stream this open was on */
for (y = 0; y < IVTV_MAX_STREAMS; y++) {
s = &ivtv_cards[x]->streams[y];