diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-01-29 10:07:13 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-05-25 12:48:33 -0300 |
| commit | f2e9084779d3ad3b51ee45a3a53fead3f16516ca (patch) | |
| tree | 79dc867b483e692582d373e41e5840adf602f1eb /drivers/media/v4l2-core | |
| parent | 9cfd65e80959836fed78704e8a127d4e10448d56 (diff) | |
[media] v4l: Validate fields in the core code for subdev EDID ioctls
The subdev EDID ioctls receive a pad field that must reference an
existing pad and an EDID field that must point to a buffer. Validate
both fields in the core code instead of duplicating validation in all
drivers.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index db126dbc19c..058c1a6e839 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -361,11 +361,27 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) sd, pad, set_selection, subdev_fh, sel); } - case VIDIOC_G_EDID: - return v4l2_subdev_call(sd, pad, get_edid, arg); + case VIDIOC_G_EDID: { + struct v4l2_subdev_edid *edid = arg; - case VIDIOC_S_EDID: - return v4l2_subdev_call(sd, pad, set_edid, arg); + if (edid->pad >= sd->entity.num_pads) + return -EINVAL; + if (edid->blocks && edid->edid == NULL) + return -EINVAL; + + return v4l2_subdev_call(sd, pad, get_edid, edid); + } + + case VIDIOC_S_EDID: { + struct v4l2_subdev_edid *edid = arg; + + if (edid->pad >= sd->entity.num_pads) + return -EINVAL; + if (edid->blocks && edid->edid == NULL) + return -EINVAL; + + return v4l2_subdev_call(sd, pad, set_edid, edid); + } case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { struct v4l2_dv_timings_cap *cap = arg; |