diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2016-02-04 11:50:50 +0100 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2016-02-08 10:35:59 +0100 |
| commit | 26f6f2d301c1fb46acb1138ee155125815239b0d (patch) | |
| tree | c99164b4e25a27cdecf664230cda79ff1c2963ec | |
| parent | drm/i915/dsi: defend gpio table against out of bounds access (diff) | |
| download | linux-26f6f2d301c1fb46acb1138ee155125815239b0d.tar.xz linux-26f6f2d301c1fb46acb1138ee155125815239b0d.zip | |
drm/i915/dsi: don't pass arbitrary data to sideband
Since sequence block v2 the second byte contains flags other than just
pull up/down. Don't pass arbitrary data to the sideband interface.
The rest may or may not work for sequence block v2, but there should be
no harm done.
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/ebe3c2eee623afc4b3a134533b01f8d591d13f32.1454582914.git.jani.nikula@intel.com
(cherry picked from commit 4e1c63e3761b84ec7d87c75b58bbc8bcf18e98ee)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c index 349775e88e5b..a8912aecc31f 100644 --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c @@ -207,7 +207,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) gpio = *data++; /* pull up/down */ - action = *data++; + action = *data++ & 1; if (gpio >= ARRAY_SIZE(gtable)) { DRM_DEBUG_KMS("unknown gpio %u\n", gpio); |