From 2e3ce5bc2aa938653c3866aa7f4901a1f199b1c8 Mon Sep 17 00:00:00 2001 From: Xin Long Date: Fri, 24 Feb 2017 15:18:46 +0800 Subject: [PATCH] sctp: set sin_port for addr param when checking duplicate address Commit b8607805dd15 ("sctp: not copying duplicate addrs to the assoc's bind address list") tried to check for duplicate address before copying to asoc's bind_addr list from global addr list. But all the addrs' sin_ports in global addr list are 0 while the addrs' sin_ports are bp->port in asoc's bind_addr list. It means even if it's a duplicate address, af->cmp_addr will still return 0 as the their sin_ports are different. This patch is to fix it by setting the sin_port for addr param with bp->port before comparing the addrs. Fixes: b8607805dd15 ("sctp: not copying duplicate addrs to the assoc's bind address list") Reported-by: Wei Chen Signed-off-by: Xin Long Signed-off-by: David S. Miller --- net/sctp/protocol.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 8227bbbd077a..1b6d4574d2b0 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -199,6 +199,7 @@ int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *bp, sctp_scope_t scope, gfp_t gfp, int copy_flags) { struct sctp_sockaddr_entry *addr; + union sctp_addr laddr; int error = 0; rcu_read_lock(); @@ -220,7 +221,10 @@ int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *bp, !(copy_flags & SCTP_ADDR6_PEERSUPP))) continue; - if (sctp_bind_addr_state(bp, &addr->a) != -1) + laddr = addr->a; + /* also works for setting ipv6 address port */ + laddr.v4.sin_port = htons(bp->port); + if (sctp_bind_addr_state(bp, &laddr) != -1) continue; error = sctp_add_bind_addr(bp, &addr->a, sizeof(addr->a),