Hello,
I'm requesting this commit to be back-ported to v4.14:
---
commit 5b18f1289808fee5d04a7e6ecf200189f41a4db6
Author: Stephen Suryaputra <ssuryaextr@xxxxxxxxx>
Date: Wed Jun 26 02:21:16 2019 -0400
ipv4: reset rt_iif for recirculated mcast/bcast out pkts
Multicast or broadcast egress packets have rt_iif set to the oif. These
packets might be recirculated back as input and lookup to the raw
sockets may fail because they are bound to the incoming interface
(skb_iif). If rt_iif is not zero, during the lookup, inet_iif() function
returns rt_iif instead of skb_iif. Hence, the lookup fails.
v2: Make it non vrf specific (David Ahern). Reword the changelog to
reflect it.
Signed-off-by: Stephen Suryaputra <ssuryaextr@xxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
We found the issue in that release and the above commit is on
linux-stable. On the discussion behind this commit, please see:
https://www.spinics.net/lists/netdev/msg581045.html
I think after the following diff is needed on top of the above commit
for v4.14:
---
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 4d85a4fdfdb0..ad2718c1624e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1623,11 +1623,8 @@ struct rtable *rt_dst_clone(struct net_device *dev, struct rtable *rt)
new_rt->rt_iif = rt->rt_iif;
new_rt->rt_pmtu = rt->rt_pmtu;
new_rt->rt_mtu_locked = rt->rt_mtu_locked;
- new_rt->rt_gw_family = rt->rt_gw_family;
- if (rt->rt_gw_family == AF_INET)
- new_rt->rt_gw4 = rt->rt_gw4;
- else if (rt->rt_gw_family == AF_INET6)
- new_rt->rt_gw6 = rt->rt_gw6;
+ new_rt->rt_gateway = rt->rt_gateway;
+ new_rt->rt_table_id = rt->rt_table_id;
INIT_LIST_HEAD(&new_rt->rt_uncached);
new_rt->dst.flags |= DST_HOST;
---
Thank you,
Stephen.
