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drm: Do not accept garbage mode aspect ratio flags

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Don't let userspace feed us any old garbage in the mode aspect ratio
flags.

Cc: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190620142639.17518-3-ville.syrjala@linux.intel.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ville Syrjälä 2019-06-20 17:26:36 +03:00
parent 700710e977
commit 993a80671e
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/drm_modes.c
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@ -1977,9 +1977,11 @@ int drm_mode_convert_umode(struct drm_device *dev,
case DRM_MODE_FLAG_PIC_AR_256_135:
out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135;
break;
default:
case DRM_MODE_FLAG_PIC_AR_NONE:
out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
break;
default:
return -EINVAL;
}
out->status = drm_mode_validate_driver(dev, out);