Commit 6b65bc29 authored Jul 28, 2016 by Wei Yongjun Committed by David S. Miller Jul 30, 2016

tipc: fix imbalance read_unlock_bh in __tipc_nl_add_monitor()



In the error handling case of nla_nest_start() failed read_unlock_bh()
is called  to unlock a lock that had not been taken yet. sparse warns
about the context imbalance as the following:

net/tipc/monitor.c:799:23: warning:
 context imbalance in '__tipc_nl_add_monitor' - different lock contexts for basic block

Fixes: cf6f7e1d ('tipc: dump monitor attributes')
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9d594b39

net/tipc/monitor.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -794,10 +794,10 @@ int __tipc_nl_add_monitor(struct net net, struct tipc_nl_msg msg,
		return 0;

		attr_msg_full:
		read_unlock_bh(&mon->lock);
		nla_nest_cancel(msg->skb, attrs);
		msg_full:
		genlmsg_cancel(msg->skb, hdr);
		read_unlock_bh(&mon->lock);

		return -EMSGSIZE;
		}