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[NET]: Fix OOPS due to missing check in dev_parse_header().

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[ 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 <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-10-18 05:09:28 -07:00 • committed by David S. Miller
parent df2e014bfb
commit 1b83336bb9
1 changed files with 1 additions and 1 deletions
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2
include/linux/netdevice.h
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@ -827,7 +827,7 @@ static inline int dev_parse_header(const struct sk_buff *skb,
{ {
const struct net_device *dev = skb->dev; const struct net_device *dev = skb->dev;
if (!dev->header_ops->parse) if (!dev->header_ops || !dev->header_ops->parse)
return 0; return 0;
return dev->header_ops->parse(skb, haddr); return dev->header_ops->parse(skb, haddr);
} }