media: verisilicon: Protect G2 HEVC decoder against invalid DPB index

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commit 47825b1646 upstream.

Fix the Hantro G2 HEVC decoder so that we use DPB index 0 whenever a
ninvalid index is received from user space. This protects the hardware
from doing faulty memory access which then leads to bus errors.

To be noted that when a reference is missing, userspace such as GStreamer
passes an invalid DPB index of 255. This issue was found by seeking to a
CRA picture using GStreamer. The framework is currently missing the code
to skip over RASL pictures placed after the CRA. This situation can also
occur while doing live streaming over lossy transport.

Fixes: cb5dd5a0fa ("media: hantro: Introduce G2/HEVC decoder")
Cc: stable@vger.kernel.org
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Nicolas Dufresne 2025-09-22 14:43:39 -04:00 • committed by Greg Kroah-Hartman

parent 3680da86c1

commit 3d0ec859e0

1 changed files with 13 additions and 2 deletions

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drivers/media/platform/verisilicon/hantro_g2_hevc_dec.c

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