linux-kernel - Re: [syzbot] KASAN: use-after-free Read in __io_req_task_work

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Date:   Thu, 12 Jan 2023 09:43:55 -0800
From:   syzbot <syzbot+01db4d8aed628ede44b1@...kaller.appspotmail.com>
To:     axboe@...nel.dk
Cc:     asml.silence@...il.com, axboe@...nel.dk, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: use-after-free Read in __io_req_task_work_add

> On 1/12/23 3:26 AM, syzbot wrote:
>> Hello,
>> 
>> syzbot found the following issue on:
>> 
>> HEAD commit:    0a093b2893c7 Add linux-next specific files for 20230112
>> git tree:       linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=111a5a86480000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=835f3591019836d5
>> dashboard link: https://syzkaller.appspot.com/bug?extid=01db4d8aed628ede44b1
>> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>> 
>> Unfortunately, I don't have any reproducer for this issue yet.
>
> #syz test: git://git.kernel.dk/linux.git for-next

This crash does not have a reproducer. I cannot test it.

>
> -- 
> Jens Axboe
>
>