netdev - Re: INFO: task hung in io_wq

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Message-ID: <bc52115c-3951-54c6-7810-86797d8c4644@kernel.dk>
Date:   Mon, 18 Nov 2019 20:15:13 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     syzbot <syzbot+0f1cc17f85154f400465@...kaller.appspotmail.com>,
        andriy.shevchenko@...ux.intel.com, davem@...emloft.net,
        f.fainelli@...il.com, gregkh@...uxfoundation.org,
        idosch@...lanox.com, kimbrownkd@...il.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, petrm@...lanox.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        viro@...iv.linux.org.uk, wanghai26@...wei.com,
        yuehaibing@...wei.com
Subject: Re: INFO: task hung in io_wq_destroy

On 11/18/19 7:23 PM, Eric Biggers wrote:
> Hi Jens,
> 
> On Mon, Oct 28, 2019 at 03:00:08PM -0600, Jens Axboe wrote:
>> This is fixed in my for-next branch for a few days at least, unfortunately
>> linux-next is still on the old one. Next version should be better.
> 
> This is still occurring on linux-next.  Here's a report on next-20191115 from
> https://syzkaller.appspot.com/text?tag=CrashReport&x=16fa3d1ce00000

Hmm, I'll take a look. Looking at the reproducer, it's got a massive
sleep at the end. I take it this triggers before that time actually
passes? Because that's around 11.5 days of sleep.

No luck reproducing this so far, I'll try on linux-next.

-- 
Jens Axboe