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net: rds: Fix possible NULL-pointer dereference

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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: fd261ce6a3 ("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>
This commit is contained in:
Artem Chernyshev 2023-09-18 16:56:23 +03:00 committed by David S. Miller
parent 4920327601
commit f1d95df0f3
1 changed files with 7 additions and 5 deletions
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12
net/rds/rdma_transport.c
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@ -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: