From: Nikita Zhandarovich <n.zhandarovich@xxxxxxxxxx>
[ Upstream commit 5d9745cead1f121974322b94ceadfb4d1e67960e ]
in_dev_get() can return NULL which will cause a failure once idev is
dereferenced in in_dev_for_each_ifa_rtnl(). This patch adds a
check for NULL value in idev beforehand.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 146b9756f14c ("RDMA/irdma: Add connection manager")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230126185230.62464-1-n.zhandarovich@xxxxxxxxxx
Reviewed-by: Sindhu Devale <sindhu.devale@xxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/irdma/cm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/infiniband/hw/irdma/cm.c b/drivers/infiniband/hw/irdma/cm.c
index 7b086fe63a245..195aa9ea18b6c 100644
--- a/drivers/infiniband/hw/irdma/cm.c
+++ b/drivers/infiniband/hw/irdma/cm.c
@@ -1722,6 +1722,9 @@ static int irdma_add_mqh_4(struct irdma_device *iwdev,
continue;
idev = in_dev_get(ip_dev);
+ if (!idev)
+ continue;
+
in_dev_for_each_ifa_rtnl(ifa, idev) {
ibdev_dbg(&iwdev->ibdev,
"CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
--
2.39.0
