On 9/2/2023 16:26, Eelco Chaudron wrote:


On 8 Feb 2023, at 8:16, Hangyu Hua wrote:

old_meter needs to be free after it is detached regardless of whether
the new meter is successfully attached.

Fixes: c7c4c44c9a95 ("net: openvswitch: expand the meters supported number")
Signed-off-by: Hangyu Hua <[email protected]>
---
  net/openvswitch/meter.c | 4 +++-
  1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c
index 6e38f68f88c2..e84082e209e9 100644
--- a/net/openvswitch/meter.c
+++ b/net/openvswitch/meter.c
@@ -448,8 +448,10 @@ static int ovs_meter_cmd_set(struct sk_buff *skb, struct 
genl_info *info)
                goto exit_unlock;

        err = attach_meter(meter_tbl, meter);
-       if (err)
+       if (err) {
+               ovs_meter_free(old_meter);
                goto exit_unlock;

It would be nicer to add another goto label like exit_free_old_meter.

+       if (err)
+       goto exit_free_old_meter:

exit_free_old_meter:
     ovs_meter_free(old_meter);
exit_unlock:
        ovs_unlock();
        nlmsg_free(reply);
exit_free_meter:


Or maybe it would be even nicer to free the old_meter outside of the global 
lock?

+       }

        ovs_unlock();

I get it. I will send a v2.

Thanks,
Hangyu

--
2.34.1

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