linux-kernel - Fwd: w_scan hangs on 6.3.7 and does not react on kill -9

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Message-ID: <67afa974-835a-77cc-d4bb-49cba0ff5bf5@gmail.com>
Date:   Mon, 12 Jun 2023 20:52:48 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Lukasz Kalamlacki <kalamlacki@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Media Mailing List <linux-media@...r.kernel.org>
Subject: Fwd: w_scan hangs on 6.3.7 and does not react on kill -9

Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

> w_scan tool on kernel 6.3.7 hangs so badly that it cannot be killed by kill -9 
> I tried also w_scan_cpp 20230604 but it also fails I have 2040:8268 Hauppauge soloHD device as reported by lsusb. During reboot of the OS it prints a lot of kernel errors but it is after syslog is killed I guess and in syslog messages I do not see anything. On default Debian kernel 5.10.0-23 this problem does not exists.


See Bugzilla for the full thread and attached dmesg and kernel config.

Lukasz: On what hardware you have this regression? Also, it is really
helpful if you can perform bisection (as outlined
in Documentation/admin-guide/bug-bisect.html) to find the culprit,
when developers can't figure it out by inspecting the code alone.
Last but not least, please also try latest mainline (currently v6.4-rc6).

Anyway, I'm adding it to regzbot:

#regzbot introduced: v5.10..v6.3 https://bugzilla.kernel.org/show_bug.cgi?id=217540
#regzbot title: w_scan zombie (unkillable) on kernel v6.3

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217540

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