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Commit c68b8b68 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
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[NETFILTER]: Fix routing of REJECT target generated packets in output chain 



Packets generated by the REJECT target in the output chain have a local
destination address and a foreign source address. Make sure not to use
the foreign source address for the output route lookup.

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e5b5ef7d

net/ipv4/netfilter.c

+5 −2
Original line number Diff line number Diff line
@@ -15,15 +15,18 @@ int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type) 
	struct flowi fl = {};

	struct dst_entry *odst;

	unsigned int hh_len;

	unsigned int type;



	type = inet_addr_type(iph->saddr);

	if (addr_type == RTN_UNSPEC)

		addr_type = inet_addr_type(iph->saddr);

		addr_type = type;



	/* some non-standard hacks like ipt_REJECT.c:send_reset() can cause

	 * packets with foreign saddr to appear on the NF_IP_LOCAL_OUT hook.

	 */

	if (addr_type == RTN_LOCAL) {

		fl.nl_u.ip4_u.daddr = iph->daddr;

		if (type == RTN_LOCAL)

			fl.nl_u.ip4_u.saddr = iph->saddr;

		fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);

		fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;