linux-kernel - Re: [syzbot] [io-uring?] WARNING in io_pin

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Message-ID: <4db729f9-eece-4732-8d6d-405a997ed35c@gmail.com>
Date: Mon, 25 Nov 2024 23:10:10 +0000
From: Pavel Begunkov <asml.silence@...il.com>
To: syzbot <syzbot+2159cbb522b02847c053@...kaller.appspotmail.com>,
 axboe@...nel.dk, io-uring@...r.kernel.org, linux-kernel@...r.kernel.org,
 syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [io-uring?] WARNING in io_pin_pages

On 11/22/24 15:02, Pavel Begunkov wrote:
> On 11/22/24 10:51, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    ae58226b89ac Add linux-next specific files for 20241118
>> git tree:       linux-next
>> console+strace: https://syzkaller.appspot.com/x/log.txt?x=14a67378580000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=45719eec4c74e6ba
>> dashboard link: https://syzkaller.appspot.com/bug?extid=2159cbb522b02847c053
>> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137beac0580000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=177beac0580000
>>
>> Downloadable assets:
>> disk image: https://storage.googleapis.com/syzbot-assets/fd3d650cd6b6/disk-ae58226b.raw.xz
>> vmlinux: https://storage.googleapis.com/syzbot-assets/89a0fb674130/vmlinux-ae58226b.xz
>> kernel image: https://storage.googleapis.com/syzbot-assets/92120e1c6775/bzImage-ae58226b.xz
>>
>> The issue was bisected to:
>>
>> commit 68685fa20edc5307fc893a06473c19661c236f29
>> Author: Pavel Begunkov <asml.silence@...il.com>
>> Date:   Fri Nov 15 16:54:38 2024 +0000
>>
>>      io_uring: fortify io_pin_pages with a warning
> 
> Seems I wasn't too paranoid. I'll send a fix

#syz test: https://github.com/isilence/linux.git syz/sanitise-cqsq

-- 
Pavel Begunkov