From: Saravanan Vajravel saravanan.vajravel@broadcom.com
[ Upstream commit 7651e2d6c5b359a28c2d4c904fec6608d1021ca8 ]
When ib_isert module receives connection error event, it is releasing the isert session and removes corresponding list node but it doesn't take appropriate mutex lock to remove the list node. This can lead to linked list corruption
Fixes: bd3792205aae ("iser-target: Fix pending connections handling in target stack shutdown sequnce") Signed-off-by: Selvin Xavier selvin.xavier@broadcom.com Signed-off-by: Saravanan Vajravel saravanan.vajravel@broadcom.com Link: https://lore.kernel.org/r/20230606102531.162967-3-saravanan.vajravel@broadco... Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/ulp/isert/ib_isert.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 6a2c31528560b..0d9b53c6e2654 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -740,9 +740,13 @@ static int isert_connect_error(struct rdma_cm_id *cma_id) { struct isert_conn *isert_conn = cma_id->qp->qp_context; + struct isert_np *isert_np = cma_id->context;
ib_drain_qp(isert_conn->qp); + + mutex_lock(&isert_np->mutex); list_del_init(&isert_conn->node); + mutex_unlock(&isert_np->mutex); isert_conn->cm_id = NULL; isert_put_conn(isert_conn);