linux-kernel - [PATCH 5.7 370/477] nvme-fc: dont call nvme_cleanup

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Date:   Tue, 23 Jun 2020 21:56:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Daniel Wagner <dwagner@...e.de>,
        Himanshu Madhani <hmadhani2024@...il.com>,
        Hannes Reinecke <hare@...e.de>,
        James Smart <james.smart@...adcom.com>,
        Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.7 370/477] nvme-fc: dont call nvme_cleanup_cmd() for AENs

From: Daniel Wagner <dwagner@...e.de>

[ Upstream commit c9c12e51b82b2bd0c59ac4e27ee5427f382a503f ]

Asynchronous event notifications do not have an associated request.
When fcp_io() fails we unconditionally call nvme_cleanup_cmd() which
leads to a crash.

Fixes: 16686f3a6c3c ("nvme: move common call to nvme_cleanup_cmd to core layer")
Signed-off-by: Daniel Wagner <dwagner@...e.de>
Reviewed-by: Himanshu Madhani <hmadhani2024@...il.com>
Reviewed-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: James Smart <james.smart@...adcom.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/host/fc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 5ef4a84c442a1..564e3f220ac79 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2300,10 +2300,11 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
 		opstate = atomic_xchg(&op->state, FCPOP_STATE_COMPLETE);
 		__nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate);
 
-		if (!(op->flags & FCOP_FLAGS_AEN))
+		if (!(op->flags & FCOP_FLAGS_AEN)) {
 			nvme_fc_unmap_data(ctrl, op->rq, op);
+			nvme_cleanup_cmd(op->rq);
+		}
 
-		nvme_cleanup_cmd(op->rq);
 		nvme_fc_ctrl_put(ctrl);
 
 		if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE &&
-- 
2.25.1