From: Sergey Senozhatsky <senozhatsky@chromium.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
Alexander Potapenko <glider@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Yosry Ahmed <yosryahmed@google.com>,
Nhat Pham <nphamcs@gmail.com>, Minchan Kim <minchan@kernel.org>,
linux-mm <linux-mm@kvack.org>,
kasan-dev <kasan-dev@googlegroups.com>,
Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Subject: Re: [mm/page_alloc or mm/vmscan or mm/zswap] use-after-free in obj_malloc()
Date: Sat, 24 Feb 2024 23:23:27 +0900 [thread overview]
Message-ID: <20240224142327.GW11472@google.com> (raw)
In-Reply-To: <6dd78966-1459-465d-a80a-39b17ecc38a6@I-love.SAKURA.ne.jp>
On (24/02/24 00:22), Tetsuo Handa wrote:
> On 2024/02/23 13:43, Sergey Senozhatsky wrote:
> > On (24/02/23 11:10), Tetsuo Handa wrote:
> >>
> >> I can observe this bug during evict_folios() from 6.7.0 to 6.8.0-rc5-00163-gffd2cb6b718e.
> >> Since I haven't observed with 6.6.0, this bug might be introduced in 6.7 cycle.
> >
> > Can we please run a bisect?
>
> Bisection pointed at commit afb2d666d025 ("zsmalloc: use copy_page for full page copy"),
> for copy_page() is implemented as non-instrumented code where KMSAN cannot handle.
> On x86_64, copy_page() is defined at arch/x86/lib/copy_page_64.S as below.
Thank you so much.
prev parent reply other threads:[~2024-02-24 14:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-23 2:10 [mm/page_alloc or mm/vmscan or mm/zswap] use-after-free in obj_malloc() Tetsuo Handa
2024-02-23 2:27 ` Yosry Ahmed
2024-02-23 4:48 ` Sergey Senozhatsky
2024-02-23 4:50 ` Yosry Ahmed
2024-02-23 4:56 ` Sergey Senozhatsky
2024-02-23 4:58 ` Sergey Senozhatsky
2024-02-23 5:05 ` Yosry Ahmed
2024-02-23 5:19 ` Sergey Senozhatsky
2024-02-23 5:23 ` Chengming Zhou
2024-02-23 5:29 ` Sergey Senozhatsky
2024-02-23 9:26 ` Tetsuo Handa
2024-02-23 10:10 ` Chengming Zhou
2024-02-23 4:43 ` Sergey Senozhatsky
2024-02-23 15:22 ` Tetsuo Handa
2024-02-23 23:54 ` [PATCH] x86: disable non-instrumented version of copy_page when KMSAN is enabled Tetsuo Handa
2024-02-24 6:27 ` [PATCH v2] " Tetsuo Handa
2024-02-24 14:23 ` Sergey Senozhatsky [this message]
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