linux-kernel - Re: WARNING in get_unlocked

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Message-ID: <CACT4Y+YAUKABCr3T6ryPSR_wygCQ5ab=o-Ouv+D9zwdffFfiMA@mail.gmail.com>
Date:   Wed, 31 Oct 2018 10:46:19 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     syzbot <syzbot+4fd0c066d82852499145@...kaller.appspotmail.com>,
        Jan Kara <jack@...e.cz>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com, Al Viro <viro@...iv.linux.org.uk>,
        zwisler@...nel.org
Subject: Re: WARNING in get_unlocked_entry

On Wed, Oct 31, 2018 at 4:18 AM, Matthew Wilcox <willy@...radead.org> wrote:
> On Tue, Oct 30, 2018 at 08:00:03AM -0700, syzbot wrote:
>> syzbot found the following crash on:
>>
>> HEAD commit:    4b42745211af Merge tag 'armsoc-soc' of git://git.kernel.or..
>> git tree:       upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1187d06d400000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=93932074d01b4a5
>> dashboard link: https://syzkaller.appspot.com/bug?extid=4fd0c066d82852499145
>> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>
> Hmmpf.  Would have been nice if syzbot had caught this during its tests
> of the -next tree ...

What -next tree do you mean? If it satisfies the criteria we can add it:
https://github.com/google/syzkaller/issues/592