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Diffstat (limited to 'net/sctp/protocol.c')
-rw-r--r--net/sctp/protocol.c48
1 files changed, 34 insertions, 14 deletions
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 3ac604f96..3d9ea9a48 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -487,23 +487,43 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
*/
rcu_read_lock();
list_for_each_entry_rcu(laddr, &bp->address_list, list) {
+ struct net_device *odev;
+
if (!laddr->valid)
continue;
- if ((laddr->state == SCTP_ADDR_SRC) &&
- (AF_INET == laddr->a.sa.sa_family)) {
- fl4->fl4_sport = laddr->a.v4.sin_port;
- flowi4_update_output(fl4,
- asoc->base.sk->sk_bound_dev_if,
- RT_CONN_FLAGS(asoc->base.sk),
- daddr->v4.sin_addr.s_addr,
- laddr->a.v4.sin_addr.s_addr);
-
- rt = ip_route_output_key(sock_net(sk), fl4);
- if (!IS_ERR(rt)) {
- dst = &rt->dst;
- goto out_unlock;
- }
+ if (laddr->state != SCTP_ADDR_SRC ||
+ AF_INET != laddr->a.sa.sa_family)
+ continue;
+
+ fl4->fl4_sport = laddr->a.v4.sin_port;
+ flowi4_update_output(fl4,
+ asoc->base.sk->sk_bound_dev_if,
+ RT_CONN_FLAGS(asoc->base.sk),
+ daddr->v4.sin_addr.s_addr,
+ laddr->a.v4.sin_addr.s_addr);
+
+ rt = ip_route_output_key(sock_net(sk), fl4);
+ if (IS_ERR(rt))
+ continue;
+
+ if (!dst)
+ dst = &rt->dst;
+
+ /* Ensure the src address belongs to the output
+ * interface.
+ */
+ odev = __ip_dev_find(sock_net(sk), laddr->a.v4.sin_addr.s_addr,
+ false);
+ if (!odev || odev->ifindex != fl4->flowi4_oif) {
+ if (&rt->dst != dst)
+ dst_release(&rt->dst);
+ continue;
}
+
+ if (dst != &rt->dst)
+ dst_release(dst);
+ dst = &rt->dst;
+ break;
}
out_unlock: