This is a note to let you know that I've just added the patch titled
net: rds: Fix possible NULL-pointer dereference
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-rds-fix-possible-null-pointer-dereference.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 74f990abc2dee431a5faa8ab4621fd22585e9101
Author: Artem Chernyshev <artem.chernyshev@xxxxxxxxxxx>
Date: Mon Sep 18 16:56:23 2023 +0300
net: rds: Fix possible NULL-pointer dereference
[ 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@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c
index 5f741e51b4baa..bb38124a5d3db 100644
--- a/net/rds/rdma_transport.c
+++ b/net/rds/rdma_transport.c
@@ -86,10 +86,12 @@ 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);
- /* XXX do we need to clean up if this fails? */
- ret = rdma_resolve_route(cm_id,
+ if (conn) {
+ rdma_set_service_type(cm_id, conn->c_tos);
+ /* 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:
