6.5-stable review patch. If anyone has any objections, please let me know.
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From: Ming Qian ming.qian@nxp.com
[ Upstream commit 5bd28eae48589694ff4e5badb03bf75dae695b3f ]
the supported_instance_count determine the instance index range, it shouldn't exceed the bits number of instance_mask, otherwise the bitops of instance_mask may cross boundaries
Fixes: 9f599f351e86 ("media: amphion: add vpu core driver") Reviewed-by: Nicolas Dufresne nicolas.dufresne@collabora.com Signed-off-by: Ming Qian ming.qian@nxp.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/amphion/vpu_core.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/amphion/vpu_core.c b/drivers/media/platform/amphion/vpu_core.c index 7863b7b53494c..2bb9f187e163c 100644 --- a/drivers/media/platform/amphion/vpu_core.c +++ b/drivers/media/platform/amphion/vpu_core.c @@ -88,6 +88,8 @@ static int vpu_core_boot_done(struct vpu_core *core)
core->supported_instance_count = min(core->supported_instance_count, count); } + if (core->supported_instance_count >= BITS_PER_TYPE(core->instance_mask)) + core->supported_instance_count = BITS_PER_TYPE(core->instance_mask); core->fw_version = fw_version; vpu_core_set_state(core, VPU_CORE_ACTIVE);