linux-kernel - [PATCH] net: openvswitch: fix possible memory leak in ovs_meter_cmd

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Date:   Wed,  8 Feb 2023 15:16:23 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     pshelar@....org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, xiangxia.m.yue@...il.com
Cc:     netdev@...r.kernel.org, dev@...nvswitch.org,
        linux-kernel@...r.kernel.org, Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] net: openvswitch: fix possible memory leak in ovs_meter_cmd_set()

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 <hbh25y@...il.com>
---
 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;
+	}
 
 	ovs_unlock();
 
-- 
2.34.1