Re: INFO: task hung in btrfs_alloc_tree_block

[Hao Sun]

Qu Wenruo <quwenruo.btrfs@xxxxxxx> 于2021年9月14日周二 上午11:13写道：
>
>
>
> On 2021/9/14 上午10:44, 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=sharing
> > kernel config: https://drive.google.com/file/d/1rUzyMbe5vcs6khA3tL9EHTLJvsUdWcgB/view?usp=sharing
>
> 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=sharing
and https://drive.google.com/file/d/1U3ei_jCODG9N5UHOspSRmykrEDSey3Qn/view?usp=sharing),
no fault-injection log was printed before the task hang.

Regards
Hao