| commit | 3aec7f871c65eb5f76b4125fda432593c834a6f2 | [log] [tgz] |
|---|---|---|
| author | Michal Srb <msrb@suse.com> | Mon Feb 05 16:04:38 2018 +0000 |
| committer | Chris Wilson <chris@chris-wilson.co.uk> | Mon Feb 05 20:49:24 2018 +0000 |
| tree | fbcd9dfa91c91c5ebe4a48a5bdffbe1d2c8611ce | |
| parent | 2f265fad9756a40c09e3f4dcc62d5d7fa73a9fb2 [diff] |
drm/i915/cmdparser: Do not check past the cmd length.
The command MEDIA_VFE_STATE checks bits at offset +2 dwords. However, it is
possible to have MEDIA_VFE_STATE command with length = 0 + LENGTH_BIAS = 2.
In that case check_cmd will read bits from the following command, or even past
the end of the buffer.
If the offset ends up outside of the command length, reject the command.
Fixes: 351e3db2b363 ("drm/i915: Implement command buffer parsing logic")
Signed-off-by: Michal Srb <msrb@suse.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180205151745.29292-1-msrb@suse.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180205160438.3267-2-chris@chris-wilson.co.uk