From: Vikash Garodia <quic_vgarodia@quicinc.com> stable inclusion from stable-v6.6.3 commit 074aed64f345ae17287716b0f7ddd577b3153fb7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8LBQP Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 5e538fce33589da6d7cb2de1445b84d3a8a692f7 upstream. Read and write pointers are used to track the packet index in the memory shared between video driver and firmware. There is a possibility of OOB access if the read or write pointer goes beyond the queue memory size. Add checks for the read and write pointer to avoid OOB access. Cc: stable@vger.kernel.org Fixes: d96d3f30c0f2 ("[media] media: venus: hfi: add Venus HFI files") 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- drivers/media/platform/qcom/venus/hfi_venus.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c index 19fc6575a489..f9437b6412b9 100644 --- a/drivers/media/platform/qcom/venus/hfi_venus.c +++ b/drivers/media/platform/qcom/venus/hfi_venus.c @@ -205,6 +205,11 @@ static int venus_write_queue(struct venus_hfi_device *hdev, new_wr_idx = wr_idx + dwords; wr_ptr = (u32 *)(queue->qmem.kva + (wr_idx << 2)); + + if (wr_ptr < (u32 *)queue->qmem.kva || + wr_ptr > (u32 *)(queue->qmem.kva + queue->qmem.size - sizeof(*wr_ptr))) + return -EINVAL; + if (new_wr_idx < qsize) { memcpy(wr_ptr, packet, dwords << 2); } else { @@ -272,6 +277,11 @@ static int venus_read_queue(struct venus_hfi_device *hdev, } rd_ptr = (u32 *)(queue->qmem.kva + (rd_idx << 2)); + + if (rd_ptr < (u32 *)queue->qmem.kva || + rd_ptr > (u32 *)(queue->qmem.kva + queue->qmem.size - sizeof(*rd_ptr))) + return -EINVAL; + dwords = *rd_ptr >> 2; if (!dwords) return -EINVAL; -- 2.25.1