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37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From a528d57967f93fb0ae67e5e6a57074805d926928 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 10 Nov 2021 16:36:12 +0000
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Subject: [PATCH 628/634] 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
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gamma LUT is of the correct length before accepting it.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_hvs.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
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index 1302260d7d87..a873d9d8fd58 100644
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--- a/drivers/gpu/drm/vc4/vc4_hvs.c
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+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
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@@ -538,6 +538,16 @@ static int vc4_hvs_gamma_check(struct drm_crtc *crtc,
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if (!crtc_state->color_mgmt_changed)
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return 0;
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+ if (crtc_state->gamma_lut) {
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+ unsigned int len = drm_color_lut_size(crtc_state->gamma_lut);
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+
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+ if (len != crtc->gamma_size) {
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+ DRM_DEBUG_KMS("Invalid LUT size; got %u, expected %u\n",
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+ len, crtc->gamma_size);
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+ return -EINVAL;
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+ }
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+ }
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+
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connector = vc4_get_crtc_connector(crtc, crtc_state);
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if (!connector)
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return -EINVAL;
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--
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2.33.1
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