[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240801000834.3930818-22-sashal@kernel.org>
Date: Wed, 31 Jul 2024 19:59:20 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Alex Hung <alex.hung@....com>,
Harry Wentland <harry.wentland@....com>,
Tom Chung <chiahsuan.chung@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>,
sunpeng.li@....com,
Rodrigo.Siqueira@....com,
christian.koenig@....com,
Xinhui.Pan@....com,
airlied@...il.com,
daniel@...ll.ch,
aric.cyr@....com,
meenakshikumar.somasundaram@....com,
Bhawanpreet.Lakha@....com,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 022/121] drm/amd/display: Check link_index before accessing dc->links[]
From: Alex Hung <alex.hung@....com>
[ Upstream commit 8aa2864044b9d13e95fe224f32e808afbf79ecdf ]
[WHY & HOW]
dc->links[] has max size of MAX_LINKS and NULL is return when trying to
access with out-of-bound index.
This fixes 3 OVERRUN and 1 RESOURCE_LEAK issues reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentland@....com>
Acked-by: Tom Chung <chiahsuan.chung@....com>
Signed-off-by: Alex Hung <alex.hung@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c
index c6c35037bdb8b..dfdfe22d9e851 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c
@@ -37,6 +37,9 @@
#include "dce/dce_i2c.h"
struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
{
+ if (link_index >= MAX_LINKS)
+ return NULL;
+
return dc->links[link_index];
}
--
2.43.0
Powered by blists - more mailing lists