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From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Carlos Llamas <cmllamas@google.com>
Cc: gregkh@linuxfoundation.org, arve@android.com, tkjos@android.com,
	maco@android.com, joel@joelfernandes.org, brauner@kernel.org,
	mllamas@google.com, surenb@google.com,
	linux-kernel@vger.kernel.org, Yeoreum Yun <yeoreun.yun@arm.com>,
	Yunseong Kim <ysk@kzalloc.com>
Subject: Re: [PATCH] driver/android/binderfs: fix race for binderfs' devices list
Date: Mon, 19 May 2025 09:15:27 +0100	[thread overview]
Message-ID: <aCron3VfqAfRAfXs@e129823.arm.com> (raw)
In-Reply-To: <aCjGSx2TvQdECBT9@google.com>

Hi Carlos,

> On Tue, May 13, 2025 at 06:47:19PM +0100, Yeoreum Yun wrote:
> > binderfs' devices list is global list and can be accesed by multi-thread
> > while unmount binder device.
> > Since there is no proper locking, it can meet datarace problem.
> > for example it's one of case reported UAF while binderfs_evict_inode()
> > removes binder device:
> >
> > sudo ./stress-ng --binderfs 8 --binderfs-ops 10000 -t 15 \
> >   --pathological --timestamp --tz --syslog --perf --no-rand-seed \
> >   --times --metrics --klog-check --status 5 -x smi -v --interrupts --change-cpu
>
> I just found this by chance (there is a typo on my email). Note this was
> already fixed here:
> https://lore.kernel.org/all/20250324132427.922495-1-dmantipov@yandex.ru/

Thanks. I didn't know that :)

--
Sincerely,
Yeoreum Yun

      reply	other threads:[~2025-05-19  8:16 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-13 17:47 [PATCH] driver/android/binderfs: fix race for binderfs' devices list Yeoreum Yun
2025-05-17 17:24 ` Carlos Llamas
2025-05-19  8:15   ` Yeoreum Yun [this message]

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