From f1d95df0f31048f1c59092648997686e3f7d9478 Mon Sep 17 00:00:00 2001
From: Artem Chernyshev <artem.chernyshev@red-soft.ru>
Date: Mon, 18 Sep 2023 16:56:23 +0300
Subject: [PATCH] net: rds: Fix possible NULL-pointer dereference
Git-commit: f1d95df0f31048f1c59092648997686e3f7d9478
Patch-mainline: v6.6-rc3
References: bsc#1220419 CVE-2023-52573 bsc#1220869
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: Jiri Wiesner <jwiesner@suse.de>
---
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 d36f3f6b4351..b15cf316b23a 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:
--
2.35.3