[ 088/109] caif: fix NULL pointer check

[Greg Kroah-Hartman]

From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Alan Cox <alan@xxxxxxxxxxxxxxx>

[ Upstream commit c66b9b7d365444b433307ebb18734757cb668a02 ]

Reported-by: <rucsoftsec@xxxxxxxxx>
Resolves-bug: http://bugzilla.kernel.org/show_bug?44441
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/caif/caif_serial.c |    3 +++
 1 file changed, 3 insertions(+)

--- 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
 
 	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;


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