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authorMauro Carvalho Chehab <m.chehab@samsung.com>2014-09-03 14:32:26 -0300
committerSylwester Nawrocki <s.nawrocki@samsung.com>2014-11-28 07:49:19 -0800
commit687e6ad9f5edd1c91a75532d4996bcb613a85f29 (patch)
tree93108dbcee924da3407860cd9cc55bd357373789 /drivers
parentb9051c938e69cef56cdfbb663c582703655d99a0 (diff)
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dmxdev: don't use before checking file->private_data
As reported by smatch: drivers/media/dvb-core/dmxdev.c:1091 dvb_demux_poll() warn: variable dereferenced before check 'dmxdevfilter' (see line 1088) This was introduced by changeset d102cac8097c. We need to test before using it. Change-Id: I4e51d508c466b915338bd0a88a7afb49f4dbeb4d Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by: Changbing Xiong <cb.xiong@samsung.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/dvb-core/dmxdev.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxdev.c
index 42b5e70d5ca..abff803ad69 100644
--- a/drivers/media/dvb-core/dmxdev.c
+++ b/drivers/media/dvb-core/dmxdev.c
@@ -1085,10 +1085,9 @@ static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
{
struct dmxdev_filter *dmxdevfilter = file->private_data;
- struct dmxdev *dmxdev = dmxdevfilter->dev;
unsigned int mask = 0;
- if ((!dmxdevfilter) || (dmxdev->exit))
+ if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
return POLLERR;
poll_wait(file, &dmxdevfilter->buffer.queue, wait);