linux-kernel - Re: INFO: task hung in io_uring

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Date:   Wed, 11 Nov 2020 12:21:43 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+6338dcebf269a590b668@...kaller.appspotmail.com>
Cc:     Pavel Begunkov <asml.silence@...il.com>,
        Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: INFO: task hung in io_uring_flush

On Thu, Sep 17, 2020 at 3:42 AM syzbot
<syzbot+6338dcebf269a590b668@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit b7ddce3cbf010edbfac6c6d8cc708560a7bcd7a4
> Author: Pavel Begunkov <asml.silence@...il.com>
> Date:   Sat Sep 5 21:45:14 2020 +0000
>
>     io_uring: fix cancel of deferred reqs with ->files
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=173d9b0d900000
> start commit:   9123e3a7 Linux 5.9-rc1
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652
> dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1573f116900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=144d3072900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: io_uring: fix cancel of deferred reqs with ->files
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: io_uring: fix cancel of deferred reqs with ->files