From: Alexander Beregalov <a.beregalov@gmail.com>
To: gregkh@suse.de, linux-kernel@vger.kernel.org
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Subject: [PATCH] staging: cx25821: avoid NULL pointer dereference
Date: Thu, 7 Jan 2010 03:21:48 +0300 [thread overview]
Message-ID: <1262823708-28664-1-git-send-email-a.beregalov@gmail.com> (raw)
Assign dev only if fh is not NULL.
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
---
drivers/staging/cx25821/cx25821-audups11.c | 3 ++-
drivers/staging/cx25821/cx25821-video.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/cx25821/cx25821-audups11.c b/drivers/staging/cx25821/cx25821-audups11.c
index 89c8fe2..46c7f78 100644
--- a/drivers/staging/cx25821/cx25821-audups11.c
+++ b/drivers/staging/cx25821/cx25821-audups11.c
@@ -343,10 +343,11 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctl)
{
struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = fh->dev;
+ struct cx25821_dev *dev;
int err;
if (fh) {
+ dev = fh->dev;
err = v4l2_prio_check(&dev->prio, &fh->prio);
if (0 != err)
return err;
diff --git a/drivers/staging/cx25821/cx25821-video.c b/drivers/staging/cx25821/cx25821-video.c
index c7c14c7..9bcece7 100644
--- a/drivers/staging/cx25821/cx25821-video.c
+++ b/drivers/staging/cx25821/cx25821-video.c
@@ -963,10 +963,11 @@ int cx25821_set_freq(struct cx25821_dev *dev, struct v4l2_frequency *f)
int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
{
struct cx25821_fh *fh = priv;
- struct cx25821_dev *dev = fh->dev;
+ struct cx25821_dev *dev;
int err;
if (fh) {
+ dev = fh->dev;
err = v4l2_prio_check(&dev->prio, &fh->prio);
if (0 != err)
return err;
--
1.6.6
reply other threads:[~2010-01-07 0:22 UTC|newest]
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