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Date: Wed, 21 Feb 2024 11:48:09 +0100 From: Michal Hocko <mhocko@...e.com> To: Greg KH <gregkh@...uxfoundation.org> Cc: "GONG, Ruiqi" <gongruiqi1@...wei.com>, linux-kernel@...r.kernel.org, stable@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>, Roman Gushchin <roman.gushchin@...ux.dev>, Shakeel Butt <shakeelb@...gle.com>, Muchun Song <muchun.song@...ux.dev>, cgroups@...r.kernel.org, linux-mm@...ck.org, Wang Weiyang <wangweiyang2@...wei.com>, Xiu Jianfeng <xiujianfeng@...wei.com> Subject: Re: [PATCH stable] memcg: add refcnt for pcpu stock to avoid UAF problem in drain_all_stock() On Wed 21-02-24 11:33:55, Greg KH wrote: > On Wed, Feb 21, 2024 at 09:48:05AM +0100, Michal Hocko wrote: > > On Wed 21-02-24 09:40:29, Greg KH wrote: > > > On Wed, Feb 21, 2024 at 04:18:01PM +0800, GONG, Ruiqi wrote: > > > > commit 1a3e1f40962c445b997151a542314f3c6097f8c3 upstream. > > > > > > > > There was a kernel panic happened on an in-house environment running > > > > 3.10, and the same problem was reproduced on 4.19: > > > > > > Now queued up, thanks! > > > > Give it some more time Greg, http://lkml.kernel.org/r/ZdW2gMajIw_cUN2-@tiehlicka > > Oops, now dropped, thanks! Race conditions. The thing got resolved in the mean time. The patch is a partial backport, and I am OK with that. Now with my questions resolved this is good to know but a note about this being a partial backport in the changelog would be nice. -- Michal Hocko SUSE Labs
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