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ISDN: hysdn, fix potential NULL dereference

Browse source 
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 <[email protected]>
Cc: Karsten Keil <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Patrick McHardy <[email protected]>
Cc: [email protected]
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Jiri Slaby 2010-06-22 01:41:36 +00:00 • committed by David S. Miller
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);