[PATCH AUTOSEL 5.4 254/330] media: venus: vdec: Init registered list unconditionally

Sasha Levin
2020-09-18T02:58:06Z

From: Stanimir Varbanov <stanimir.varbanov@linaro.org>

[ Upstream commit bc3d870e414b42d72cd386aa20a4fc3612e4feb7 ]

Presently the list initialization is done only in
dynamic-resolution-change state, which leads to list corruptions
and use-after-free. Init list_head unconditionally in
vdec_stop_capture called by vb2 stop_streaming without takeing
into account current codec state.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/qcom/venus/vdec.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 59ae7a1e63bc2..05b80a66e80ed 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -987,13 +987,14 @@ static int vdec_stop_capture(struct venus_inst *inst)
ret = hfi_session_flush(inst, HFI_FLUSH_OUTPUT);
vdec_cancel_dst_buffers(inst);
inst->codec_state = VENUS_DEC_STATE_CAPTURE_SETUP;
- INIT_LIST_HEAD(&inst->registeredbufs);
venus_helper_free_dpb_bufs(inst);
break;
default:
- return 0;
+ break;
}

+ INIT_LIST_HEAD(&inst->registeredbufs);
+
return ret;
}

--
2.25.1