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From:   Hao Sun <sunhao.th@gmail.com>
Date:   Tue, 14 Sep 2021 11:22:42 +0800
Message-ID: <CACkBjsbUnPQ1J5HpXW-be2jb_h2k8d4b2p-epp5pUek_Rf0reQ@mail.gmail.com>
Subject: Re: INFO: task hung in btrfs_alloc_tree_block
To:     Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc:     clm@fb.com, dsterba@suse.com, josef@toxicpanda.com,
        linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org
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Qu Wenruo <quwenruo.btrfs@gmx.com> =E4=BA=8E2021=E5=B9=B49=E6=9C=8814=E6=97=
=A5=E5=91=A8=E4=BA=8C =E4=B8=8A=E5=8D=8811:13=E5=86=99=E9=81=93=EF=BC=9A
>
>
>
> On 2021/9/14 =E4=B8=8A=E5=8D=8810:44, Hao Sun wrote:
> > Hello,
> >
> > When using Healer to fuzz the latest Linux kernel, the following crash
> > was triggered.
> >
> > HEAD commit: 6880fa6c5660 Linux 5.15-rc1
> > git tree: upstream
> > console output:
> > https://drive.google.com/file/d/1U3ei_jCODG9N5UHOspSRmykrEDSey3Qn/view?=
usp=3Dsharing
> > kernel config: https://drive.google.com/file/d/1rUzyMbe5vcs6khA3tL9EHTL=
JvsUdWcgB/view?usp=3Dsharing
>
> Any recorded info for the injected errors during the test?
>
> It's hanging on a tree lock, without knowing the error injected, it's
> really hard to find out what's the cause.
>

The `task hang` happened without any fault injection.
Based on the recorded logs
(https://drive.google.com/file/d/1x7u4JfyeL8WhetacBsPDVXm48SvVJUo7/view?usp=
=3Dsharing
and https://drive.google.com/file/d/1U3ei_jCODG9N5UHOspSRmykrEDSey3Qn/view?=
usp=3Dsharing),
no fault-injection log was printed before the task hang.

Regards
Hao