6.5-stable review patch. If anyone has any objections, please let me know.
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From: Artem Chernyshev artem.chernyshev@red-soft.ru
[ Upstream commit f1d95df0f31048f1c59092648997686e3f7d9478 ]
In rds_rdma_cm_event_handler_cmn() check, if conn pointer exists before dereferencing it as rdma_set_service_type() argument
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: fd261ce6a30e ("rds: rdma: update rdma transport for tos") Signed-off-by: Artem Chernyshev artem.chernyshev@red-soft.ru Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/rds/rdma_transport.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c index d36f3f6b43510..b15cf316b23a2 100644 --- a/net/rds/rdma_transport.c +++ b/net/rds/rdma_transport.c @@ -86,11 +86,13 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id, break;
case RDMA_CM_EVENT_ADDR_RESOLVED: - rdma_set_service_type(cm_id, conn->c_tos); - rdma_set_min_rnr_timer(cm_id, IB_RNR_TIMER_000_32); - /* XXX do we need to clean up if this fails? */ - ret = rdma_resolve_route(cm_id, - RDS_RDMA_RESOLVE_TIMEOUT_MS); + if (conn) { + rdma_set_service_type(cm_id, conn->c_tos); + rdma_set_min_rnr_timer(cm_id, IB_RNR_TIMER_000_32); + /* XXX do we need to clean up if this fails? */ + ret = rdma_resolve_route(cm_id, + RDS_RDMA_RESOLVE_TIMEOUT_MS); + } break;
case RDMA_CM_EVENT_ROUTE_RESOLVED: