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| author | Arjan van de Ven <arjan@linux.intel.com> | 2008-10-10 21:16:12 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-22 14:21:33 -0700 |
| commit | cd9f58efb861a86283931f3db17aa2a4fe4da642 (patch) | |
| tree | cf025a1cf179005203ce8e6342b2002cb52a8b9b | |
| parent | 686c714cce06e8804e15daf7ce3d4f80c35c6a69 (diff) | |
| download | linux-stable-cd9f58efb861a86283931f3db17aa2a4fe4da642.tar.gz linux-stable-cd9f58efb861a86283931f3db17aa2a4fe4da642.tar.bz2 linux-stable-cd9f58efb861a86283931f3db17aa2a4fe4da642.zip | |
security: avoid calling a NULL function pointer in drivers/video/tvaudio.c
commit 5ba2f67afb02c5302b2898949ed6fc3b3d37dcf1 upstream
NULL function pointers are very bad security wise. This one got caught by
kerneloops.org quite a few times, so it's happening in the field....
Fix is simple, check the function pointer for NULL, like 6 other places
in the same function are already doing.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/media/video/tvaudio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/video/tvaudio.c b/drivers/media/video/tvaudio.c index 463680b13289..b59e47272abf 100644 --- a/drivers/media/video/tvaudio.c +++ b/drivers/media/video/tvaudio.c @@ -1792,7 +1792,7 @@ static int chip_command(struct i2c_client *client, break; case VIDIOC_S_FREQUENCY: chip->mode = 0; /* automatic */ - if (desc->checkmode) { + if (desc->checkmode && desc->setmode) { desc->setmode(chip,V4L2_TUNER_MODE_MONO); if (chip->prevmode != V4L2_TUNER_MODE_MONO) chip->prevmode = -1; /* reset previous mode */ |