From 4b235c02bb8675d1889cd572f130341907eccd3c Mon Sep 17 00:00:00 2001 From: Chao Leng Date: Mon, 12 Oct 2020 16:10:40 +0800 Subject: [PATCH] nvme-rdma: fix crash when connect rejected [ Upstream commit 43efdb8e870ee0f58633fd579aa5b5185bf5d39e ] A crash can happened when a connect is rejected. The host establishes the connection after received ConnectReply, and then continues to send the fabrics Connect command. If the controller does not receive the ReadyToUse capsule, host may receive a ConnectReject reply. Call nvme_rdma_destroy_queue_ib after the host received the RDMA_CM_EVENT_REJECTED event. Then when the fabrics Connect command times out, nvme_rdma_timeout calls nvme_rdma_complete_rq to fail the request. A crash happenes due to use after free in nvme_rdma_complete_rq. nvme_rdma_destroy_queue_ib is redundant when handling the RDMA_CM_EVENT_REJECTED event as nvme_rdma_destroy_queue_ib is already called in connection failure handler. Signed-off-by: Chao Leng Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/host/rdma.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 9e378d0a0c01c..116902b1b2c34 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1926,7 +1926,6 @@ static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id, complete(&queue->cm_done); return 0; case RDMA_CM_EVENT_REJECTED: - nvme_rdma_destroy_queue_ib(queue); cm_error = nvme_rdma_conn_rejected(queue, ev); break; case RDMA_CM_EVENT_ROUTE_ERROR: