scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route()

[ Upstream commit cc555759117e8349088e0c5d19f2f2a500bafdbd ]

ip_dev_find() can return NULL so add a check for NULL pointer.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index f2c561c..cd2c247 100644 (file)
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -641,6 +641,10 @@ cxgbi_check_route(struct sockaddr *dst_addr, int ifindex)
 
        if (ndev->flags & IFF_LOOPBACK) {
                ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
+               if (!ndev) {
+                       err = -ENETUNREACH;
+                       goto rel_neigh;
+               }
                mtu = ndev->mtu;
                pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
                        n->dev->name, ndev->name, mtu);