[PATCH net] rtnetlink: fix netns leak with rtnl_setlink()

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A call to rtnl_nets_destroy() is needed to release references taken on
netns put in rtnl_nets.

CC: stable@xxxxxxxxxxxxxxx
Fixes: 636af13f213b ("rtnetlink: Register rtnl_dellink() and rtnl_setlink() with RTNL_FLAG_DOIT_PERNET_WIP.")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
---
 net/core/rtnetlink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 1f4d4b5570ab..d1e559fce918 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3432,6 +3432,7 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 		err = -ENODEV;
 
 	rtnl_nets_unlock(&rtnl_nets);
+	rtnl_nets_destroy(&rtnl_nets);
 errout:
 	return err;
 }
-- 
2.47.1





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