linux-kernel - Re: [PATCH tip/core/rcu 8/9] net/netfilter: Replace rcu_swap_protected() with rcu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20191008141611.usmxb5vzoxc36wqw@salvia>
Date:   Tue, 8 Oct 2019 16:16:11 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     paulmck@...nel.org
Cc:     rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH tip/core/rcu 8/9] net/netfilter: Replace
 rcu_swap_protected() with rcu_replace()

On Wed, Oct 02, 2019 at 06:43:09PM -0700, paulmck@...nel.org wrote:
> From: "Paul E. McKenney" <paulmck@...nel.org>
> 
> This commit replaces the use of rcu_swap_protected() with the more
> intuitively appealing rcu_replace() as a step towards removing
> rcu_swap_protected().
> 
> Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
> Reported-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> Cc: Pablo Neira Ayuso <pablo@...filter.org>
> Cc: Jozsef Kadlecsik <kadlec@...filter.org>
> Cc: Florian Westphal <fw@...len.de>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: <netfilter-devel@...r.kernel.org>
> Cc: <coreteam@...filter.org>
> Cc: <netdev@...r.kernel.org>

Acked-by: Pablo Neira Ayuso <pablo@...filter.org>

> ---
>  net/netfilter/nf_tables_api.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
> index d481f9b..8499baf 100644
> --- a/net/netfilter/nf_tables_api.c
> +++ b/net/netfilter/nf_tables_api.c
> @@ -1461,8 +1461,9 @@ static void nft_chain_stats_replace(struct nft_trans *trans)
>  	if (!nft_trans_chain_stats(trans))
>  		return;
>  
> -	rcu_swap_protected(chain->stats, nft_trans_chain_stats(trans),
> -			   lockdep_commit_lock_is_held(trans->ctx.net));
> +	nft_trans_chain_stats(trans) =
> +		rcu_replace(chain->stats, nft_trans_chain_stats(trans),
> +			    lockdep_commit_lock_is_held(trans->ctx.net));
>  
>  	if (!nft_trans_chain_stats(trans))
>  		static_branch_inc(&nft_counters_enabled);
> -- 
> 2.9.5
>