From: David L Stevens <david.stevens@oracle.com>
Date: Wed, 1 Oct 2014 15:05:27 +0000 (-0400)
Subject: sunvnet: fix potential NULL pointer dereference
X-Git-Tag: v4.9.8~5591^2~90
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a29c9c43bb633a9965909cd548879fee4aa789a4;p=platform%2Fkernel%2Flinux-rpi3.git

sunvnet: fix potential NULL pointer dereference

One of the error cases for vnet_start_xmit()'s "out_dropped" label
is port == NULL, so only mess with port->clean_timer when port is not NULL.

Signed-off-by: David L Stevens <david.stevens@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index 1262697..1539672 100644
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -1073,7 +1073,7 @@ out_dropped:
 	if (pending)
 		(void)mod_timer(&port->clean_timer,
 				jiffies + VNET_CLEAN_TIMEOUT);
-	else
+	else if (port)
 		del_timer(&port->clean_timer);
 	dev->stats.tx_dropped++;
 	return NETDEV_TX_OK;