linux-kernel - Re: Kernel crash in free_pipe

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Message-ID: <CAM_iQpVKwMHkAQ_vOfNJnxWzf1EQC-QgiWOGZNjMjjuEuCAhhw@mail.gmail.com>
Date:   Fri, 10 Nov 2017 11:16:34 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Simon Brewer <sbrunau@...il.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: Kernel crash in free_pipe_info()

Hi, Simon

On Thu, Nov 9, 2017 at 10:07 PM, Simon Brewer <sbrunau@...il.com> wrote:
> This looks familiar...
>
> https://github.com/moby/moby/issues/34472
>
> From the bug report:
> "In particular, it looks like either docker-containerd or
> docker-containerd-shim (the log is cut off) has a pipe open that is
> causing a kernel BUG when attempting to kill the process. Fun times."

Yeah, looks nearly the same.

If you know how to reproduce it reliably, that would help a lot.

Also, as suggested by Linus, turning on slub debug would also help.
Or enable kdump to get a core dump.

Thanks!