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Tue, 06 Oct 2026 01:18:46 -0700 (PDT) Received: from localhost.localdomain ([78.40.184.2]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5bb7c71911bsm3903389e87.11.2026.10.06.01.18.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2026 01:18:46 -0700 (PDT) From: Roman Demidov To: stable@vger.kernel.org, Greg Kroah-Hartman Cc: Roman Demidov , Chengchang Tang , Junxian Huang , Jason Gunthorpe , Leon Romanovsky , Yixian Liu , Salil Mehta , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org, Sasha Levin Subject: [PATCH 5.10] RDMA/hns: Fix WQ_MEM_RECLAIM warning Date: Tue, 6 Oct 2026 11:18:39 +0300 Message-ID: <20261006081840.125567-1-roman.demidov.nn@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chengchang Tang commit c0a26bbd3f99b7b03f072e3409aff4e6ec8af6f6 upstream. When sunrpc is used, if a reset triggered, our wq may lead the following trace: workqueue: WQ_MEM_RECLAIM xprtiod:xprt_rdma_connect_worker [rpcrdma] is flushing !WQ_MEM_RECLAIM hns_roce_irq_workq:flush_work_handle [hns_roce_hw_v2] WARNING: CPU: 0 PID: 8250 at kernel/workqueue.c:2644 check_flush_dependency+0xe0/0x144 Call trace: check_flush_dependency+0xe0/0x144 start_flush_work.constprop.0+0x1d0/0x2f0 __flush_work.isra.0+0x40/0xb0 flush_work+0x14/0x30 hns_roce_v2_destroy_qp+0xac/0x1e0 [hns_roce_hw_v2] ib_destroy_qp_user+0x9c/0x2b4 rdma_destroy_qp+0x34/0xb0 rpcrdma_ep_destroy+0x28/0xcc [rpcrdma] rpcrdma_ep_put+0x74/0xb4 [rpcrdma] rpcrdma_xprt_disconnect+0x1d8/0x260 [rpcrdma] xprt_rdma_connect_worker+0xc0/0x120 [rpcrdma] process_one_work+0x1cc/0x4d0 worker_thread+0x154/0x414 kthread+0x104/0x144 ret_from_fork+0x10/0x18 Since QP destruction frees memory, this wq should have the WQ_MEM_RECLAIM. Fixes: ffd541d45726 ("RDMA/hns: Add the workqueue framework for flush cqe handler") Signed-off-by: Chengchang Tang Signed-off-by: Junxian Huang Link: https://patch.msgid.link/20260104064057.1582216-2-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin Signed-off-by: Roman Demidov --- Backport fix for CVE-2026-46265 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index bb744ba155e2..56c7af1c3b24 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -6087,7 +6087,8 @@ static int hns_roce_v2_init_eq_table(struct hns_roce_dev *hr_dev) goto err_request_irq_fail; } - hr_dev->irq_workq = alloc_ordered_workqueue("hns_roce_irq_workq", 0); + hr_dev->irq_workq = alloc_ordered_workqueue("hns_roce_irq_workq", + WQ_MEM_RECLAIM); if (!hr_dev->irq_workq) { dev_err(dev, "Create irq workqueue failed!\n"); ret = -ENOMEM; -- 2.53.0