[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>

diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 4d31515..baaedd9 100644 (file)
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -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];