[Bug 250309] devmatch: panic: general protection fault: sysctl_devices() -> sysctl_root_handler_locked() in hw.bus.devices sysctl handler when plugging in USB mouse

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 07 Sep 2022 00:01:19 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250309

Kubilay Kocak <koobs@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Open
                 CC|                            |hselasky@FreeBSD.org,
                   |                            |mhorne@freebsd.org,
                   |                            |usb@FreeBSD.org
              Flags|                            |maintainer-feedback?(mhorne
                   |                            |@freebsd.org),
                   |                            |maintainer-feedback?(imp@Fr
                   |                            |eeBSD.org),
                   |                            |maintainer-feedback?(hselas
                   |                            |ky@FreeBSD.org),
                   |                            |mfc-stable13?,
                   |                            |mfc-stable12?
           Keywords|panic                       |crash, needs-qa
            Summary|panics with hw.bus.devices  |devmatch: panic: general
                   |sysctl handler              |protection fault:
                   |                            |sysctl_devices() ->
                   |                            |sysctl_root_handler_locked(
                   |                            |) in hw.bus.devices sysctl
                   |                            |handler when plugging in
                   |                            |USB mouse
           Severity|Affects Only Me             |Affects Some People

--- Comment #1 from Kubilay Kocak <koobs@FreeBSD.org> ---
Received report of what appears to be the same issue from a user on Twitter.
Have requested they attach system information and crash traceback, pending.

We have a patch in comment 0, which has one confirmation of resolution, but may
require a rebase against latest CURRENT.

@Reporter If you're able to produce an updated patch, please do so, thank you

^Triage: Request feedback from folks recently in and around kern/subr_bus,
devmatch and USB

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