From: Varun Prakash <varun@chelsio.com>
Date: Wed, 22 May 2019 14:40:55 +0000 (+0530)
Subject: scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cc555759117e8349088e0c5d19f2f2a500bafdbd;p=linux.git

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

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>
---

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 8b915d4ed98dc..7d43e014bd215 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -639,6 +639,10 @@ 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);