From: Jens Axboe <[email protected]>
To: Dmitry Vyukov <[email protected]>,
syzbot <[email protected]>,
Al Viro <[email protected]>,
[email protected],
linux-fsdevel <[email protected]>
Cc: Borislav Petkov <[email protected]>, "H. Peter Anvin" <[email protected]>,
LKML <[email protected]>,
Ingo Molnar <[email protected]>,
Peter Zijlstra <[email protected]>,
syzkaller-bugs <[email protected]>,
Thomas Gleixner <[email protected]>,
[email protected], the arch/x86 maintainers <[email protected]>
Subject: Re: KASAN: use-after-free Read in percpu_ref_switch_to_atomic_rcu
Date: Wed, 4 Mar 2020 07:40:02 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <CACT4Y+ZVLs7O84qixsvFqk_Nur1WOaCU81RiCwDf3wOqvHB-ag@mail.gmail.com>
On 3/4/20 12:59 AM, Dmitry Vyukov wrote:
> On Fri, Feb 7, 2020 at 9:14 AM syzbot
> <[email protected]> wrote:
>>
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit: 4c7d00cc Merge tag 'pwm/for-5.6-rc1' of git://git.kernel.o..
>> git tree: upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=12fec785e00000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=e162021ddededa72
>> dashboard link: https://syzkaller.appspot.com/bug?extid=e017e49c39ab484ac87a
>> compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: [email protected]
>
> +io_uring maintainers
>
> Here is a repro:
> https://gist.githubusercontent.com/dvyukov/6b340beab6483a036f4186e7378882ce/raw/cd1922185516453c201df8eded1d4b006a6d6a3a/gistfile1.txt
I've queued up a fix for this:
https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.6&id=9875fe3dc4b8cff1f1b440fb925054a5124403c3
--
Jens Axboe
next prev parent reply other threads:[~2020-03-04 14:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <[email protected]>
2020-03-04 7:59 ` KASAN: use-after-free Read in percpu_ref_switch_to_atomic_rcu Dmitry Vyukov
2020-03-04 14:40 ` Jens Axboe [this message]
2020-03-06 14:35 ` Dan Carpenter
2020-03-06 14:57 ` Jens Axboe
2020-03-06 14:57 ` Jann Horn
2020-03-06 15:34 ` Jens Axboe
2020-03-06 15:36 ` Jann Horn
2020-03-06 16:44 ` Paul E. McKenney
2020-03-06 17:00 ` Jens Axboe
2020-03-06 17:08 ` Jens Axboe
2020-03-06 17:19 ` Paul E. McKenney
2020-03-06 17:21 ` Jens Axboe
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