tipc: use RTNL lock to protect tipc_net_stop routine

As the tipc network initialization(ie, tipc_net_start routine) is
under RTNL protection, its corresponding deinitialization part(ie,
tipc_net_stop routine) should be protected by RTNL too.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/tipc/net.c b/net/tipc/net.c
index 4c564eb69e1a..24d2d21266a4 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -195,11 +195,13 @@ void tipc_net_stop(void)
                 return;
 
         tipc_nametbl_withdraw(TIPC_CFG_SRV, tipc_own_addr, 0, tipc_own_addr);
+        rtnl_lock();
         write_lock_bh(&tipc_net_lock);
         tipc_bearer_stop();
         tipc_bclink_stop();
         tipc_node_stop();
         write_unlock_bh(&tipc_net_lock);
+        rtnl_unlock();
 
         pr_info("Left network mode\n");
 }