This fixes http://bugzilla.kernel.org/show_bug.cgi?id=6388
The bug is caused by ip_route_input dereferencing skb->nh.protocol of
the dummy skb passed dow from inet_rtm_getroute (Thanks Thomas for seeing
it). It only happens if the route requested is for a multicast IP
address.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- linux-2.6.16.6.orig/net/ipv4/route.c
+++ linux-2.6.16.6/net/ipv4/route.c
@@ -2750,7 +2750,10 @@ int inet_rtm_getroute(struct sk_buff *in
/* Reserve room for dummy headers, this skb can pass
through good chunk of routing engine.
*/
- skb->mac.raw = skb->data;
+ skb->mac.raw = skb->nh.raw = skb->data;
+
+ /* Bugfix: need to give ip_route_input enough of an IP header to not
gag. */
+ skb->nh.iph->protocol = IPPROTO_ICMP;
skb_reserve(skb, MAX_HEADER + sizeof(struct iphdr));
if (rta[RTA_SRC - 1])
-
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