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ISDN: hysdn, fix potential NULL dereference 

Stanse found that lp is dereferenced earlier than checked for being
NULL in hysdn_rx_netpkt. Move the initialization below the test.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Slaby 2010-06-22 01:41:36 +00:00 committed by David S. Miller
parent cc413d9097
commit d41de3c100
1 changed files with 2 additions and 1 deletions
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3
drivers/isdn/hysdn/hysdn_net.c
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@ -187,12 +187,13 @@ void
hysdn_rx_netpkt(hysdn_card * card, unsigned char *buf, unsigned short len)
{
struct net_local *lp = card->netif;
struct net_device *dev = lp->dev;
struct net_device *dev;
struct sk_buff *skb;
if (!lp)
return; /* non existing device */
dev = lp->dev;
dev->stats.rx_bytes += len;
skb = dev_alloc_skb(len);