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drm/i915: Reject undefined colorkey flags 

Check that userspace isn't passing in garbage in the colorkey
ioctl flags.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180206204333.4399-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Ville Syrjälä 2018-02-06 22:43:33 +02:00
parent 928f0cd0eb
commit 89746e790a
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/intel_sprite.c
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@ -1073,6 +1073,9 @@ int intel_sprite_set_colorkey(struct drm_device *dev, void *data,
/* ignore the pointless "none" flag */
set->flags &= ~I915_SET_COLORKEY_NONE;
if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
return -EINVAL;
/* Make sure we don't try to enable both src & dest simultaneously */
if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
return -EINVAL;