[Patch net] tipc: fix a double kfree_skb()

[Cong Wang]

tipc_udp_xmit() drops the packet on error, there is no
need to drop it again.

Fixes: ef20cd4dd163 ("tipc: introduce UDP replicast")
Reported-and-tested-by: syzbot+eae585ba2cc2752d3...@syzkaller.appspotmail.com
Cc: Ying Xue <ying....@windriver.com>
Cc: Jon Maloy <jon.ma...@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/tipc/udp_media.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 10dc59ce9c82..1b1ba1310ea7 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -245,10 +245,8 @@ static int tipc_udp_send_msg(struct net *net, struct 
sk_buff *skb,
                }
 
                err = tipc_udp_xmit(net, _skb, ub, src, &rcast->addr);
-               if (err) {
-                       kfree_skb(_skb);
+               if (err)
                        goto out;
-               }
        }
        err = 0;
 out:
-- 
2.19.2