diff options
| author | Stephen Hemminger <shemminger@osdl.org> | 2006-04-17 17:27:11 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-04-17 17:27:11 -0700 |
| commit | d2c962b8530b84f4e035df8ade7e35f353a57cbe (patch) | |
| tree | 5cd3e1a27642f59caea6dd8dbfd3c5461a972e0c | |
| parent | c19f7a9e1ac45b57375d51f033b02deca50f4d3f (diff) | |
[IPV4]: ip_route_input panic fix
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 <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/route.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index ff434821909..cc9423de731 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2741,7 +2741,10 @@ int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg) /* 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]) |