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

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Message-ID: <0c2fec53-cdb6-520f-13a9-8f3f3ef7c9ec@I-love.SAKURA.ne.jp>
Date:   Thu, 6 Sep 2018 07:07:27 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     syzbot <syzbot+72000baa7858f1703b04@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com
Cc:     hirofumi@...l.parknet.co.jp, linux-kernel@...r.kernel.org
Subject: Re: INFO: task hung in vfat_lookup

On 2018/09/05 20:19, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    420f51f4ab6b Merge tag 'arm64-fixes' of git://git.kernel.o..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11296c92400000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=531a917630d2a492
> dashboard link: https://syzkaller.appspot.com/bug?extid=72000baa7858f1703b04
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> 
> Unfortunately, I don't have any reproducer for this crash yet.

A report for linux-next contains

"getblk(): executed=9 bh_count=0 bh_state=0"

lines. Therefore,

#syz dup: INFO: task hung in generic_file_write_iter