This is a note to let you know that I've just added the patch titled
drm/amd/display: added NULL check at start of dc_validate_stream
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-added-null-check-at-start-of-dc_vali.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1c6d4cc4e77bbd5f549bcb02de6e2196cd74bbe1
Author: winstang <winstang@xxxxxxx>
Date: Mon May 27 08:51:19 2024 -0400
drm/amd/display: added NULL check at start of dc_validate_stream
[ Upstream commit 26c56049cc4f1705b498df013949427692a4b0d5 ]
[Why]
prevent invalid memory access
[How]
check if dc and stream are NULL
Co-authored-by: winstang <winstang@xxxxxxx>
Reviewed-by: Alvin Lee <alvin.lee2@xxxxxxx>
Acked-by: Zaeem Mohamed <zaeem.mohamed@xxxxxxx>
Signed-off-by: winstang <winstang@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 0a13c06eea44..6a993cdb101e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2914,6 +2914,9 @@ void resource_build_bit_depth_reduction_params(struct dc_stream_state *stream,
enum dc_status dc_validate_stream(struct dc *dc, struct dc_stream_state *stream)
{
+ if (dc == NULL || stream == NULL)
+ return DC_ERROR_UNEXPECTED;
+
struct dc_link *link = stream->link;
struct timing_generator *tg = dc->res_pool->timing_generators[0];
enum dc_status res = DC_OK;
