This is a note to let you know that I've just added the patch titled
media: cedrus: hevc: Add check for invalid timestamp
to the 5.19-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:
media-cedrus-hevc-add-check-for-invalid-timestamp.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2c7a94a8ada4468c00550f58e13470ef927cc703
Author: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Date: Mon Jul 18 18:56:49 2022 +0200
media: cedrus: hevc: Add check for invalid timestamp
[ Upstream commit 143201a6435bf65f0115435e9dc6d95c66b908e9 ]
Not all DPB entries will be used most of the time. Unused entries will
thus have invalid timestamps. They will produce negative buffer index
which is not specifically handled. This works just by chance in current
code. It will even produce bogus pointer, but since it's not used, it
won't do any harm.
Let's fix that brittle design by skipping writing DPB entry altogether
if timestamp is invalid.
Fixes: 86caab29da78 ("media: cedrus: Add HEVC/H.265 decoding support")
Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Reviewed-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
index 2f6404fccd5a..04419381ea56 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
@@ -147,6 +147,9 @@ static void cedrus_h265_frame_info_write_dpb(struct cedrus_ctx *ctx,
dpb[i].pic_order_cnt_val
};
+ if (buffer_index < 0)
+ continue;
+
cedrus_h265_frame_info_write_single(ctx, i, dpb[i].field_pic,
pic_order_cnt,
buffer_index);
