diff mbox series

[ovs-dev,net-next,v4,09/10] net: openvswitch: don't unlock mutex when changing the user_features fails

Message ID 1571135440-24313-10-git-send-email-xiangxia.m.yue@gmail.com
State Changes Requested
Headers show
Series optimize openvswitch flow looking up | expand

Commit Message

Tonghao Zhang Oct. 15, 2019, 10:30 a.m. UTC 
From: Tonghao Zhang <xiangxia.m.yue@gmail.com>

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@mellanox.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Tested-by: Greg Rose <gvrose8192@gmail.com>
---
 net/openvswitch/datapath.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

William Tu Oct. 18, 2019, 11:27 p.m. UTC | #1 
On Wed, Oct 16, 2019 at 5:56 AM <xiangxia.m.yue@gmail.com> wrote:
>
> From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>
> 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@mellanox.com>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
> Tested-by: Greg Rose <gvrose8192@gmail.com>
> ---

LGTM
Acked-by: William Tu <u9012063@gmail.com>


>  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 9fea7e1..aeb76e4 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -1657,6 +1657,7 @@ 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;
>         }
>
> @@ -1673,7 +1674,6 @@ 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);
> --
> 1.8.3.1
>
> _______________________________________________
> dev mailing list
> dev@openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
diff mbox series

Patch

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 9fea7e1..aeb76e4 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1657,6 +1657,7 @@  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;
 	}
 
@@ -1673,7 +1674,6 @@  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);