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| author | Jesper Juhl <jj@chaosbits.net> | 2012-03-04 16:25:04 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-19 14:13:51 -0300 |
| commit | 266e8ae37daa04fb3d89759305659f4e0acbc126 (patch) | |
| tree | abe4d6853750453d98050970cccc6352a06f83da /drivers/media/video/cx231xx/cx231xx-video.c | |
| parent | 1a611d8cd078e0059a4a596bcbed0bd8a915e2ef (diff) | |
| download | lwn-266e8ae37daa04fb3d89759305659f4e0acbc126.tar.gz lwn-266e8ae37daa04fb3d89759305659f4e0acbc126.zip | |
[media] media, cx231xx: Fix double free on close
In cx231xx_v4l2_close() there are two calls to
cx231xx_release_resources(dev) followed by kfree(dev). That is a
problem since cx231xx_release_resources() already kfree()'s its
argument, so we end up doing a double free.
Easily resolved by just removing the redundant kfree() calls after the
calls to cx231xx_release_resources().
I also changed the 'dev = NULL' assignments (which are rather
pointless since 'dev' is about to go out of scope), to 'fh->dev = NULL'
since it looks to me that that is what was actually intended.
And I removed the 'dev = NULL' assignment at the end of
cx231xx_release_resources() since it is pointless.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx231xx/cx231xx-video.c')
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-video.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c index 829a41b0c9ef..7f916f0685e9 100644 --- a/drivers/media/video/cx231xx/cx231xx-video.c +++ b/drivers/media/video/cx231xx/cx231xx-video.c @@ -2319,8 +2319,7 @@ static int cx231xx_v4l2_close(struct file *filp) if (dev->state & DEV_DISCONNECTED) { if (atomic_read(&dev->devlist_count) > 0) { cx231xx_release_resources(dev); - kfree(dev); - dev = NULL; + fh->dev = NULL; return 0; } return 0; @@ -2350,8 +2349,7 @@ static int cx231xx_v4l2_close(struct file *filp) free the remaining resources */ if (dev->state & DEV_DISCONNECTED) { cx231xx_release_resources(dev); - kfree(dev); - dev = NULL; + fh->dev = NULL; return 0; } |