linux-kernel - Re: [PATCH net v6 05/10] ip6mr: Lock RTNL before ip6mr_new_table() call in ip6mr_rules

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Message-ID: <20241017181022.GB25857@breakpoint.cc>
Date: Thu, 17 Oct 2024 20:10:22 +0200
From: Florian Westphal <fw@...len.de>
To: Stefan Wiehler <stefan.wiehler@...ia.com>
Cc: "David S . Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v6 05/10] ip6mr: Lock RTNL before ip6mr_new_table()
 call in ip6mr_rules_init()

Stefan Wiehler <stefan.wiehler@...ia.com> wrote:
> +	rtnl_lock();
>  	mrt = ip6mr_new_table(net, RT6_TABLE_DFLT);
>  	if (IS_ERR(mrt)) {
>  		err = PTR_ERR(mrt);
>  		goto err1;
>  	}
> +	rtnl_unlock();
>  
>  	err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0);
>  	if (err < 0)
> @@ -254,6 +256,7 @@ static int __net_init ip6mr_rules_init(struct net *net)
>  	ip6mr_free_table(mrt);
>  	rtnl_unlock();
>  err1:
> +	rtnl_unlock();

Looks like a double-unlock?