Thread (8 messages) 8 messages, 3 authors, 2022-06-01
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[PATCH net 4/5] netfilter: flowtable: fix missing FLOWI_FLAG_ANYSRC flag

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2022-05-31 22:03:17
Also in: netfilter-devel
Subsystem: netfilter, networking [general], the rest · Maintainers: Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds 

From: wenxu <redacted>

The nf_flow_table gets route through ip_route_output_key. If the saddr
is not local one, then FLOWI_FLAG_ANYSRC flag should be set. Without
this flag, the route lookup for other_dst will fail.

Fixes: 3412e1641828 (netfilter: flowtable: nft_flow_route use more data for reverse route)
Signed-off-by: wenxu <redacted>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_flow_offload.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index a16cf47199b7..20e5f372dd76 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -237,6 +237,7 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
 		fl.u.ip4.flowi4_iif = this_dst->dev->ifindex;
 		fl.u.ip4.flowi4_tos = RT_TOS(ip_hdr(pkt->skb)->tos);
 		fl.u.ip4.flowi4_mark = pkt->skb->mark;
+		fl.u.ip4.flowi4_flags = FLOWI_FLAG_ANYSRC;
 		break;
 	case NFPROTO_IPV6:
 		fl.u.ip6.daddr = ct->tuplehash[dir].tuple.src.u3.in6;
@@ -245,6 +246,7 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
 		fl.u.ip6.flowi6_iif = this_dst->dev->ifindex;
 		fl.u.ip6.flowlabel = ip6_flowinfo(ipv6_hdr(pkt->skb));
 		fl.u.ip6.flowi6_mark = pkt->skb->mark;
+		fl.u.ip6.flowi6_flags = FLOWI_FLAG_ANYSRC;
 		break;
 	}
 
-- 
2.30.2
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