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Subject: media: venus: hfi: fix the check to handle session buffer requirement Author: Vikash Garodia quic_vgarodia@quicinc.com Date: Thu Aug 10 07:55:02 2023 +0530

Buffer requirement, for different buffer type, comes from video firmware. While copying these requirements, there is an OOB possibility when the payload from firmware is more than expected size. Fix the check to avoid the OOB possibility.

Cc: stable@vger.kernel.org Fixes: 09c2845e8fe4 ("[media] media: venus: hfi: add Host Firmware Interface (HFI)") Reviewed-by: Nathan Hebert nhebert@chromium.org Signed-off-by: Vikash Garodia quic_vgarodia@quicinc.com Signed-off-by: Stanimir Varbanov stanimir.k.varbanov@gmail.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl

drivers/media/platform/qcom/venus/hfi_msgs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

---

diff --git a/drivers/media/platform/qcom/venus/hfi_msgs.c b/drivers/media/platform/qcom/venus/hfi_msgs.c index 7cab685a2ec8..0a041b4db9ef 100644 --- a/drivers/media/platform/qcom/venus/hfi_msgs.c +++ b/drivers/media/platform/qcom/venus/hfi_msgs.c @@ -398,7 +398,7 @@ session_get_prop_buf_req(struct hfi_msg_session_property_info_pkt *pkt, memcpy(&bufreq[idx], buf_req, sizeof(*bufreq)); idx++;

- if (idx > HFI_BUFFER_TYPE_MAX) + if (idx >= HFI_BUFFER_TYPE_MAX) return HFI_ERR_SESSION_INVALID_PARAMETER;

req_bytes -= sizeof(struct hfi_buffer_requirements);