Subject: [PATCH net-next] sunvnet: fix potential NULL pointer dereference

From: David L Stevens <[email-masked]>
Date: Wed, 01 Oct 2014 11:05:27 -0400

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 <[email-masked]>
---
 drivers/net/ethernet/sun/sunvnet.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

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;
-- 
1.7.1