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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-10-02 02:47:58 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-10-07 10:19:34 -0300 |
| commit | 1b8b10cc7e6bd9bf017c58e32b1e7f632e23850d (patch) | |
| tree | f5e97c8bbf2bbc0797088f08d34c6f9cd795f202 /drivers/media | |
| parent | 8a18382c3196978164f0f6290aac98f2f6f43c00 (diff) | |
| download | talos-obmc-linux-1b8b10cc7e6bd9bf017c58e32b1e7f632e23850d.tar.gz talos-obmc-linux-1b8b10cc7e6bd9bf017c58e32b1e7f632e23850d.zip | |
[media] v4l2-ioctl: add blocks check for VIDIOC_SUBDEV_G/S_EDID
The maximum size of an EDID is 32768 bytes, which is 32768 / 128 = 256 blocks.
Return -EINVAL if blocks > 256 to ensure that the memory allocation is sane.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 16205d9bddfc..11874c170cbe 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -2212,6 +2212,10 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, struct v4l2_subdev_edid *edid = parg; if (edid->blocks) { + if (edid->blocks > 256) { + ret = -EINVAL; + break; + } *user_ptr = (void __user *)edid->edid; *kernel_ptr = (void *)&edid->edid; *array_size = edid->blocks * 128; |
