[PATCH] iser-target: Fix possible use-after-free in connection establishment error

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In case we fail to establish the connection we must drain our pre-posted
login recieve work request before continuing safely with connection
teardown.

Reported-by: Amrani, Ram <Ram.Amrani@xxxxxxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
 drivers/infiniband/ulp/isert/ib_isert.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index ceabdb85df8b..9d4785ba24cb 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -741,6 +741,7 @@ isert_connect_error(struct rdma_cm_id *cma_id)
 {
 	struct isert_conn *isert_conn = cma_id->qp->qp_context;
 
+	ib_drain_qp(isert_conn->qp);
 	list_del_init(&isert_conn->node);
 	isert_conn->cm_id = NULL;
 	isert_put_conn(isert_conn);
-- 
2.14.1

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