Re: [PATCH] fs: Add to super_blocks list after SB_BORN is set.

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To: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH] fs: Add to super_blocks list after SB_BORN is set.
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Fri, 13 Jul 2018 13:00:04 +0100
Cc: syzbot <syzbot+2349f5067b1772c1d8a5@xxxxxxxxxxxxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx
In-reply-to: <5c3c26a9-c5ac-6f1c-1465-4127db1db9f7@I-love.SAKURA.ne.jp>
User-agent: Mutt/1.9.1 (2017-09-22)

On Fri, Jul 13, 2018 at 07:09:03PM +0900, Tetsuo Handa wrote:
> More simple version. Is this assumption correct?

Racy, for obvious reasons (sget/sget)

References:
- INFO: task hung in iterate_supers
  - From: syzbot
- Re: INFO: task hung in iterate_supers
  - From: Tetsuo Handa
- Re: INFO: task hung in iterate_supers
  - From: Tetsuo Handa
- [PATCH] fs: Add to super_blocks list after SB_BORN is set.
  - From: Tetsuo Handa

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