diff options
| author |   Michal Srb <msrb@suse.com> | 2018-02-05 16:04:38 +0000 |
|---|---|---|
| committer |   Rodrigo Vivi <rodrigo.vivi@intel.com> | 2018-02-06 11:41:40 -0800 |
| commit | b3ad99ed45917f42884fee731fa3cf9b8229a26c (patch) | |
| tree | 3656d717867d7a011efcd1bdeaff130ed27f49e2 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | drm/i915/cmdparser: Check reg_table_count before derefencing. (diff) | |
| download | wireguard-linux-b3ad99ed45917f42884fee731fa3cf9b8229a26c.tar.xz wireguard-linux-b3ad99ed45917f42884fee731fa3cf9b8229a26c.zip | |
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
(cherry picked from commit 3aec7f871c65eb5f76b4125fda432593c834a6f2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions