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[IPV4]: skb->dst can't be NULL in ip_options_echo. 

ip_options_echo is called on the packet input path after the initial
routing. The dst entry on the packet is cleared only in the several
very specific places and immidiately assigned back (may be new).

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-03-03 11:50:10 -08:00 committed by David S. Miller
parent 1d1c8d13c4
commit da7ef338a2
1 changed files with 1 additions and 4 deletions
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5
net/ipv4/ip_options.c
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@ -107,10 +107,7 @@ int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
sptr = skb_network_header(skb);
dptr = dopt->__data;
if (skb->dst)
daddr = ((struct rtable*)skb->dst)->rt_spec_dst;
else
daddr = ip_hdr(skb)->daddr;
daddr = ((struct rtable*)skb->dst)->rt_spec_dst;
if (sopt->rr) {
optlen = sptr[sopt->rr+1];