driver inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IB7ASV

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If it fails to modify QP to RTR, dip_ctx will not be attached. And during detroying QP, the invalid dip_ctx pointer will be accessed.

Fixes: 5da61758eb8f ("RDMA/hns: Fix different dgids mapping to the same dip_idx") Signed-off-by: Chengchang Tang tangchengchang@huawei.com Signed-off-by: Xinghai Cen cenxinghai@h-partners.com --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index 052b14835643..92d053a9471b 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -6039,6 +6039,9 @@ static void put_dip_ctx_idx(struct hns_roce_dev *hr_dev, { struct hns_roce_dip *hr_dip = hr_qp->dip;

+ if (!hr_dip) + return; + xa_lock(&hr_dev->qp_table.dip_xa);

hr_dip->qp_cnt--;