linux-kernel - Re: WARNING in __init

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Message-ID: <20211018044745.GA23657@lst.de>
Date:   Mon, 18 Oct 2021 06:47:45 +0200
From:   Christoph Hellwig <hch@....de>
To:     Zqiang <qiang.zhang1211@...il.com>
Cc:     Hao Sun <sunhao.th@...il.com>, Hillf Danton <hdanton@...a.com>,
        hch@...radead.org, willy@...radead.org,
        Linux MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>, syzkaller-bugs@...glegroups.com
Subject: Re: WARNING in __init_work



On Mon, Oct 18, 2021 at 12:43:38PM +0800, Zqiang wrote:
> This is the details of the test, Hope it helps you

Call me stupid, but I can only find the trace and linked to unreadable
google sites that wan't me to log in somehow and no actual details.

If you have a direct link to the reproducer (an attachment would do
it as well) I'd love to try it myself.

Otherwise this commit in the block-5.15 tree should help to catch what
I suspect is the root cause (final ref drop before unregister) earlier
and with a better backtrace:

https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.15&id=a20417611b98e12a724e5c828c472ea16990b71f