linux-kernel - Re: [PATCH] mm: memcg: add NULL check to obj_cgroup

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: <20240316125957.GA372017@cmpxchg.org>
Date: Sat, 16 Mar 2024 08:59:57 -0400
From: Johannes Weiner <hannes@...xchg.org>
To: Yosry Ahmed <yosryahmed@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: memcg: add NULL check to obj_cgroup_put()

On Sat, Mar 16, 2024 at 01:58:03AM +0000, Yosry Ahmed wrote:
> 9 out of 16 callers perform a NULL check before calling
> obj_cgroup_put(). Move the NULL check in the function, similar to
> mem_cgroup_put(). The unlikely() NULL check in current_objcg_update()
> was left alone to avoid dropping the unlikey() annotation as this a fast
> path.
> 
> Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>