[PATCH 5.8 028/118] nvme-tcp: cancel async events before freeing event struct

Greg Kroah-Hartman
2020-09-21T16:56:34Z

From: David Milburn <dmilburn@redhat.com>

[ Upstream commit ceb1e0874dba5cbfc4e0b4145796a4bfb3716e6a ]

Cancel async event work in case async event has been queued up, and
nvme_tcp_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/tcp.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index f1f66bf96cbb9..24467eea73999 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1567,6 +1567,7 @@ static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl,
static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl)
{
if (to_tcp_ctrl(ctrl)->async_req.pdu) {
+ cancel_work_sync(&ctrl->async_event_work);
nvme_tcp_free_async_req(to_tcp_ctrl(ctrl));
to_tcp_ctrl(ctrl)->async_req.pdu = NULL;
}
--
2.25.1