[PATCH -next] tipc: fix the error handling in tipc_udp_enable()

[Wei Yongjun]

From: Wei Yongjun <weiyongj...@huawei.com>

Fix to return a negative error code in enable_mcast() error handling
case, and release udp socket when necessary.

Fixes: d0f91938bede ("tipc: add ip/udp media type")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 net/tipc/udp_media.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 33bdf54..453ab0b 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -396,10 +396,13 @@ static int tipc_udp_enable(struct net *net, struct 
tipc_bearer *b,
        tuncfg.encap_destroy = NULL;
        setup_udp_tunnel_sock(net, ub->ubsock, &tuncfg);
 
-       if (enable_mcast(ub, remote))
+       err = enable_mcast(ub, remote);
+       if (err)
                goto err;
        return 0;
 err:
+       if (ub->ubsock)
+               udp_tunnel_sock_release(ub->ubsock);
        kfree(ub);
        return err;
 }