[ovs-dev] [PATCH AUTOSEL 5.4 096/205] net: openvswitch: don't unlock mutex when changing the user_features fails

Sasha Levin sashal at kernel.org
Thu Jan 16 16:41:11 UTC 2020


From: Tonghao Zhang <xiangxia.m.yue at gmail.com>

[ Upstream commit 4c76bf696a608ea5cc555fe97ec59a9033236604 ]

Unlocking of a not locked mutex is not allowed.
Other kernel thread may be in critical section while
we unlock it because of setting user_feature fail.

Fixes: 95a7233c4 ("net: openvswitch: Set OvS recirc_id from tc chain index")
Cc: Paul Blakey <paulb at mellanox.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
Tested-by: Greg Rose <gvrose8192 at gmail.com>
Acked-by: William Tu <u9012063 at gmail.com>
Acked-by: Pravin B Shelar <pshelar at ovn.org>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 net/openvswitch/datapath.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 23f67b8fdeaa..3eed90bfa2bf 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1667,6 +1667,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 				ovs_dp_reset_user_features(skb, info);
 		}
 
+		ovs_unlock();
 		goto err_destroy_meters;
 	}
 
@@ -1683,7 +1684,6 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 	return 0;
 
 err_destroy_meters:
-	ovs_unlock();
 	ovs_meters_exit(dp);
 err_destroy_ports_array:
 	kfree(dp->ports);
-- 
2.20.1



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