From: Patrick McHardy Date: Thu, 18 Oct 2007 12:09:28 +0000 (-0700) Subject: [NET]: Fix OOPS due to missing check in dev_parse_header(). X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1b83336bb9fa4f110b5b0a4378a82cd5f0fd0ac8;p=linux-beck.git [NET]: Fix OOPS due to missing check in dev_parse_header(). [ This is kernel bugzilla 9174 "linux-2.6.23-git11 kernel panic" ] The device in question is an IPv6-over-IPv4 tunnel, which doesn't have any header_ops, so the crash happens in dev_parse_header when dereferencing them. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 39dd83b183a9..452c88d971ad 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -827,7 +827,7 @@ static inline int dev_parse_header(const struct sk_buff *skb, { const struct net_device *dev = skb->dev; - if (!dev->header_ops->parse) + if (!dev->header_ops || !dev->header_ops->parse) return 0; return dev->header_ops->parse(skb, haddr); }