This is a note to let you know that I've just added the patch titled
drm/amd/display: Skip finding free audio for unknown engine_id
to the 4.19-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-skip-finding-free-audio-for-unknown-.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1f8b72e5e5d33ab397ca101e1150fceb45f97857
Author: Alex Hung <alex.hung@xxxxxxx>
Date: Mon Apr 22 13:52:27 2024 -0600
drm/amd/display: Skip finding free audio for unknown engine_id
[ Upstream commit 1357b2165d9ad94faa4c4a20d5e2ce29c2ff29c3 ]
[WHY]
ENGINE_ID_UNKNOWN = -1 and can not be used as an array index. Plus, it
also means it is uninitialized and does not need free audio.
[HOW]
Skip and return NULL.
This fixes 2 OVERRUN issues reported by Coverity.
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
Signed-off-by: Alex Hung <alex.hung@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 6896d69b8c240..8b4337794d1ef 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1703,6 +1703,9 @@ static struct audio *find_first_free_audio(
{
int i, available_audio_count;
+ if (id == ENGINE_ID_UNKNOWN)
+ return NULL;
+
available_audio_count = pool->audio_count;
for (i = 0; i < available_audio_count; i++) {
