[PATCH 4.18 017/197] tipc: fix a missing rhashtable_walk_exit()

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Cong Wang <xiyou.wangcong@xxxxxxxxx>

[ Upstream commit bd583fe30427500a2d0abe25724025b1cb5e2636 ]

rhashtable_walk_exit() must be paired with rhashtable_walk_enter().

Fixes: 40f9f4397060 ("tipc: Fix tipc_sk_reinit race conditions")
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Ying Xue <ying.xue@xxxxxxxxxxxxx>
Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/tipc/socket.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2675,6 +2675,8 @@ void tipc_sk_reinit(struct net *net)
 
 		rhashtable_walk_stop(&iter);
 	} while (tsk == ERR_PTR(-EAGAIN));
+
+	rhashtable_walk_exit(&iter);
 }
 
 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)