linux-kernel - Re: [PATCH] mm: list_lru: fix UAF for memory cgroup

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Message-Id: <20240731132825.1fb29122d35997a425368b32@linux-foundation.org>
Date: Wed, 31 Jul 2024 13:28:25 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Muchun Song <songmuchun@...edance.com>
Cc: hannes@...xchg.org, muchun.song@...ux.dev, nphamcs@...il.com,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org, Vlastimil Babka
 <vbabka@...e.cz>, shakeel.butt@...ux.dev
Subject: Re: [PATCH] mm: list_lru: fix UAF for memory cgroup

On Thu, 18 Jul 2024 16:36:07 +0800 Muchun Song <songmuchun@...edance.com> wrote:

> The mem_cgroup_from_slab_obj() is supposed to be called under rcu
> lock or cgroup_mutex or others which could prevent returned memcg
> from being freed. Fix it by adding missing rcu read lock.
> 

Well I grabbed this, but the review led me to expect a v2.

Should it have cc:stable?