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Subject: Re: what trees/branches to test on syzbot
From:   Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     Dmitry Vyukov <dvyukov@google.com>,
        Guenter Roeck <groeck@google.com>,
        "Theodore Ts'o" <tytso@mit.edu>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        syzkaller <syzkaller@googlegroups.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        David Miller <davem@davemloft.net>,
        kbuild test robot <fengguang.wu@intel.com>
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Date:   Tue, 10 Jul 2018 11:13:58 +0900
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Andrew Morton wrote:
> On Sat, 7 Jul 2018 08:26:32 +0900 Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> wrote:
> 
> > Hello Andrew,
> > 
> > It seems that syzbot (experimentally ?) restarted testing linux-next.
> > 
> > May I ask you to carry temporarily debug printk() patch at
> > https://groups.google.com/d/msg/syzkaller-bugs/E8M8WTqt034/OpadOICfCAAJ
> > for "INFO: task hung in __sb_start_write" case?
> > 
> > The bug should be reproduced within a day if executed under syzbot environment.
> > Thus, I'm sure that we don't need to carry this patch for long.
> 
> Sure, I can add that.

Thank you.

>                        Let's get the build warning sorted out first,
> please.  Any old silly workaround will suffice in a developer-only
> debug patch.

The build warning is about mips architecture rather than this patch itself,
for x86_64 builds fine. You can add this patch despite the build warning.