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[IPV4]: Prevent oops when printing martian source 

In some cases, we may be generating packets with a source address that
qualifies as martian. This can happen when we're in the middle of setting
up the network, and netfilter decides to reject a packet with an RST.
The IPv4 routing code would try to print a warning and oops, because
locally generated packets do not have a valid skb->mac.raw pointer
at this point.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Olaf Kirch 2005-07-11 21:01:42 -07:00 committed by David S. Miller
parent af9debd461
commit 0b7f22aab4
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/route.c
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@ -1685,7 +1685,7 @@ static void ip_handle_martian_source(struct net_device *dev,
printk(KERN_WARNING "martian source %u.%u.%u.%u from "
"%u.%u.%u.%u, on dev %s\n",
NIPQUAD(daddr), NIPQUAD(saddr), dev->name);
if (dev->hard_header_len) {
if (dev->hard_header_len && skb->mac.raw) {
int i;
unsigned char *p = skb->mac.raw;
printk(KERN_WARNING "ll header: ");