From: jsg <jsg@openbsd.org>
Date: Fri, 11 Oct 2024 02:26:49 +0000 (+0000)
Subject: drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=e5386f85f3b726ebd7ff1c6f99ae76b1796e3cf0;p=openbsd

drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation

From Srinivasan Shanmugam
0d38a0751143afc03faef02d55d31f70374ff843 in linux-6.6.y/6.6.55
bc50b614d59990747dd5aeced9ec22f9258991ff in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dcn30/dcn30_cm_common.c b/sys/dev/pci/drm/amd/display/dc/dcn30/dcn30_cm_common.c
index e0df9b0065f..e0b1fc92ed1 100644
--- a/sys/dev/pci/drm/amd/display/dc/dcn30/dcn30_cm_common.c
+++ b/sys/dev/pci/drm/amd/display/dc/dcn30/dcn30_cm_common.c
@@ -355,6 +355,8 @@ bool cm3_helper_translate_curve_to_degamma_hw_format(
 				i += increment) {
 			if (j == hw_points - 1)
 				break;
+			if (i >= TRANSFER_FUNC_POINTS)
+				return false;
 			rgb_resulted[j].red = output_tf->tf_pts.red[i];
 			rgb_resulted[j].green = output_tf->tf_pts.green[i];
 			rgb_resulted[j].blue = output_tf->tf_pts.blue[i];