linux-kernel - Re: linux-next boot error: can't ssh into the instance (2)

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Date:   Mon, 4 Feb 2019 09:20:16 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+94522064b07f06df116d@...kaller.appspotmail.com>,
        David Howells <dhowells@...hat.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: linux-next boot error: can't ssh into the instance (2)

On Mon, Feb 4, 2019 at 9:13 AM syzbot
<syzbot+94522064b07f06df116d@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    66d54fa79f95 Add linux-next specific files for 20190204
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=17823b28c00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=f0f6544db42451b4
> dashboard link: https://syzkaller.appspot.com/bug?extid=94522064b07f06df116d
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+94522064b07f06df116d@...kaller.appspotmail.com

[    6.272518][    T1] BUG: KASAN: global-out-of-bounds in
fs_validate_description+0x109/0x6e9

Probably introduced by:

commit 82685adaccb3e756d04161ebfc9d188b57def10c
Author: David Howells
Date:   Thu Nov 1 23:07:24 2018 +0000

    vfs: Add configuration parser helpers



> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@...glegroups.com.
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
> syzbot.