linux-kernel - Re: possible deadlock in io_queue_linked

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Message-ID: <bdc51bf8-0a66-0a48-aaa5-6c0afc81daa8@kernel.dk>
Date:   Mon, 10 Aug 2020 09:59:44 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     syzbot <syzbot+d4586d3028284ff8a0be@...kaller.appspotmail.com>,
        io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: possible deadlock in io_queue_linked_timeout

On 8/10/20 9:37 AM, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    06a81c1c Merge tag 'arm64-fixes' of git://git.kernel.org/p..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13fbac1c900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=bf68a13f867fd1b4
> dashboard link: https://syzkaller.appspot.com/bug?extid=d4586d3028284ff8a0be
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1362024e900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1672fd34900000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+d4586d3028284ff8a0be@...kaller.appspotmail.com

Looks like a dupe of: syzbot+996f91b6ec3812c48042@...kaller.appspotmail.com

-- 
Jens Axboe