netdev - Re: [PATCH 01/14] wireguard: allowedips: replace call_rcu by kfree_rcu for simple kmem_cache

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: <ZmW85kuO2Eje6gE9@zx2c4.com>
Date: Sun, 9 Jun 2024 16:32:06 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Julia Lawall <Julia.Lawall@...ia.fr>
Cc: kernel-janitors@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	wireguard@...ts.zx2c4.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Paul E . McKenney" <paulmck@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH 01/14] wireguard: allowedips: replace call_rcu by
 kfree_rcu for simple kmem_cache_free callback

Hi Julia & Vlastimil,

On Sun, Jun 09, 2024 at 10:27:13AM +0200, Julia Lawall wrote:
> Since SLOB was removed, it is not necessary to use call_rcu
> when the callback only performs kmem_cache_free. Use
> kfree_rcu() directly.

Thanks, I applied this to the wireguard tree, and I'll send this out as
a fix for 6.10. Let me know if this is unfavorable to you and if you'd
like to take this somewhere yourself, in which case I'll give you my
ack.

Just a question, though, for Vlastimil -- I know that with the SLOB
removal, kfree() is now allowed on kmemcache'd objects. Do you plan to
do a blanket s/kmem_cache_free/kfree/g at some point, and then remove
kmem_cache_free all together?

Jason