diff mbox series

[for-rc,2/4] RDMA/hns: Fix accessing invalid dip_ctx during destroying QP

Message ID 20241220055249.146943-3-huangjunxian6@hisilicon.com (mailing list archive)
State New
Headers show
Series RDMA/hns: Bugfixes | expand

Commit Message

Junxian Huang Dec. 20, 2024, 5:52 a.m. UTC 
From: Chengchang Tang <tangchengchang@huawei.com>

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: faa62440a577 ("RDMA/hns: Fix different dgids mapping to the same dip_idx")
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 697b17cca02e..6dddadb90e02 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -5619,6 +5619,9 @@  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--;