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

[Shakeel Butt]

On Thu, Jul 18, 2024 at 04:36:07PM GMT, Muchun Song 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.
> 
> Fixes: 0a97c01cd20bb ("list_lru: allow explicit memcg and NUMA node selection)
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Yup I noticed these as well while reviewing Kairui's patches.

Acked-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>