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From: Yosry Ahmed <yosryahmed@google.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Nhat Pham <nphamcs@gmail.com>,
	 Chengming Zhou <zhouchengming@bytedance.com>,
	linux-mm@kvack.org,  linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: zswap: fix objcg use-after-free in entry destruction
Date: Tue, 30 Jan 2024 01:44:37 +0000	[thread overview]
Message-ID: <ZbhUhSLyNcTK0_gd@google.com> (raw)
In-Reply-To: <20240130013438.565167-1-hannes@cmpxchg.org>

On Mon, Jan 29, 2024 at 08:34:38PM -0500, Johannes Weiner wrote:
> In the per-memcg LRU universe, LRU removal uses entry->objcg to
> determine which list count needs to be decreased. Drop the objcg
> reference after updating the LRU, to fix a possible use-after-free.
> 
> Fixes: a65b0e7607cc ("zswap: make shrinking memcg-aware")

Lots of hotfixes for zswap in v6.8 these couple of days :)

> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>

Acked-by: Yosry Ahmed <yosryahmed@google.com>

Thanks!


  reply	other threads:[~2024-01-30  1:44 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-30  1:34 [PATCH] mm: zswap: fix objcg use-after-free in entry destruction Johannes Weiner
2024-01-30  1:44 ` Yosry Ahmed [this message]
2024-01-30  2:41 ` Chengming Zhou
2024-01-30  7:26 ` Nhat Pham

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