queue-4.19/scsi-libcxgbi-add-a-check-for-null-pointer-in-cxgbi_.patch

   1 From e8b27eb5d275456cc09d3bc3d16c839c309dd248 Mon Sep 17 00:00:00 2001
   2 From: Varun Prakash <varun@chelsio.com>
   3 Date: Wed, 22 May 2019 20:10:55 +0530
   4 Subject: scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route()
   5
   6 [ Upstream commit cc555759117e8349088e0c5d19f2f2a500bafdbd ]
   7
   8 ip_dev_find() can return NULL so add a check for NULL pointer.
   9
  10 Signed-off-by: Varun Prakash <varun@chelsio.com>
  11 Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
  12 Signed-off-by: Sasha Levin <sashal@kernel.org>
  13 ---
  14  drivers/scsi/cxgbi/libcxgbi.c | 4 ++++
  15  1 file changed, 4 insertions(+)
  16
  17 diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
  18 index f2c561ca731a..cd2c247d6d0c 100644
  19 --- a/drivers/scsi/cxgbi/libcxgbi.c
  20 +++ b/drivers/scsi/cxgbi/libcxgbi.c
  21 @@ -641,6 +641,10 @@ cxgbi_check_route(struct sockaddr *dst_addr, int ifindex)
  22
  23         if (ndev->flags & IFF_LOOPBACK) {
  24                 ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
  25 +               if (!ndev) {
  26 +                       err = -ENETUNREACH;
  27 +                       goto rel_neigh;
  28 +               }
  29                 mtu = ndev->mtu;
  30                 pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
  31                         n->dev->name, ndev->name, mtu);
  32 --
  33 2.20.1
  34