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authorXin Long <lucien.xin@gmail.com>2018-09-20 17:27:28 +0800
committerDavid S. Miller <davem@davemloft.net>2018-09-20 11:29:30 -0700
commitd7ab5cdce54da631f0c8c11e506c974536a3581e (patch)
tree013a257de980989041bcdeecf8209f365d157e7c /net/sysctl_net.c
parent8c6ec3613e7b0aade20a3196169c0bab32ed3e3f (diff)
downloadlinux-d7ab5cdce54da631f0c8c11e506c974536a3581e.tar.bz2
sctp: update dst pmtu with the correct daddr
When processing pmtu update from an icmp packet, it calls .update_pmtu with sk instead of skb in sctp_transport_update_pmtu. However for sctp, the daddr in the transport might be different from inet_sock->inet_daddr or sk->sk_v6_daddr, which is used to update or create the route cache. The incorrect daddr will cause a different route cache created for the path. So before calling .update_pmtu, inet_sock->inet_daddr/sk->sk_v6_daddr should be updated with the daddr in the transport, and update it back after it's done. The issue has existed since route exceptions introduction. Fixes: 4895c771c7f0 ("ipv4: Add FIB nexthop exceptions.") Reported-by: ian.periam@dialogic.com Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sysctl_net.c')
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