sctp: add routing output fallback

[cascardo/linux.git] / net / sctp / protocol.c

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 4abf94d..b714333 100644 (file)
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -506,16 +506,22 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
                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) {
-                       dst_release(&rt->dst);
+                       if (&rt->dst != dst)
+                               dst_release(&rt->dst);
                        continue;
                }
 
+               if (dst != &rt->dst)
+                       dst_release(dst);
                dst = &rt->dst;
                break;
        }