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drm/vc4: Validate the size of the gamma_lut

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Add a check to vc4_hvs_gamma_check to ensure a new non-empty
gamma LUT is of the correct length before accepting it.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2021-11-10 16:36:12 +00:00
committed by Dom Cobley
parent 6954044a8b
commit 91eab75a15
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/vc4/vc4_hvs.c
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@@ -614,6 +614,16 @@ static int vc4_hvs_gamma_check(struct drm_crtc *crtc,
if (!crtc_state->color_mgmt_changed) if (!crtc_state->color_mgmt_changed)
return 0; return 0;
if (crtc_state->gamma_lut) {
unsigned int len = drm_color_lut_size(crtc_state->gamma_lut);
if (len != crtc->gamma_size) {
DRM_DEBUG_KMS("Invalid LUT size; got %u, expected %u\n",
len, crtc->gamma_size);
return -EINVAL;
}
}
connector = vc4_get_crtc_connector(crtc, crtc_state); connector = vc4_get_crtc_connector(crtc, crtc_state);
if (!connector) if (!connector)
return -EINVAL; return -EINVAL;