caif: fix NULL pointer check

Reported-by: <rucsoftsec@gmail.com>
Resolves-bug: http://bugzilla.kernel.org/show_bug?44441
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index 8a3054b84812..5de74e762021 100644
--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -325,6 +325,9 @@ static int ldisc_open(struct tty_struct *tty)
 
         sprintf(name, "cf%s", tty->name);
         dev = alloc_netdev(sizeof(*ser), name, caifdev_setup);
+        if (!dev)
+                return -ENOMEM;
+
         ser = netdev_priv(dev);
         ser->tty = tty_kref_get(tty);
         ser->dev = dev;