4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jani Nikula <[email protected]> commit 4db3a2448ec8902310acb78de39b6227a9a56ac8 upstream. Do not blindly trust the VBT data used for indexing. Reviewed-by: Ville Syrjälä <[email protected]> Signed-off-by: Jani Nikula <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/cc32d40c2b47f2d2151811855ac2c3dabab1d57d.1454582914.git.jani.nik...@intel.com (cherry picked from commit 5d2d0a12d3d08bf50434f0b5947bb73bac04b941) Signed-off-by: Jani Nikula <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c @@ -209,6 +209,11 @@ static const u8 *mipi_exec_gpio(struct i /* pull up/down */ action = *data++; + if (gpio >= ARRAY_SIZE(gtable)) { + DRM_DEBUG_KMS("unknown gpio %u\n", gpio); + goto out; + } + function = gtable[gpio].function_reg; pad = gtable[gpio].pad_reg; @@ -226,6 +231,7 @@ static const u8 *mipi_exec_gpio(struct i vlv_gpio_nc_write(dev_priv, pad, val); mutex_unlock(&dev_priv->sb_lock); +out: return data; }
