From: Greg KH <gregkh@linuxfoundation.org>
To: Phillip Susi <phill@thesusis.net>
Cc: rafael@kernel.org, jeyu@kernel.org, linux-kernel@vger.kernel.org,
msekleta@redhat.com, Peter Rajnoha <prajnoha@redhat.com>
Subject: Re: [PATCH 1/2] kobject: return error code if writing /sys/.../uevent fails
Date: Thu, 29 Apr 2021 19:27:59 +0200 [thread overview]
Message-ID: <YIrsn98AFX3y6SDT@kroah.com> (raw)
In-Reply-To: <878s515hbp.fsf@vps.thesusis.net>
On Thu, Apr 29, 2021 at 09:40:08AM -0400, Phillip Susi wrote:
> Just an FYI, I've been tracking down a bug that was causing the debian
> bullseye installer to immediately crash and reboot the xen domU and
> bisected it to this commit. It appears that the Xen Virtual Keyboard
> driver ( and at least one other, probably more ) were always broken and
> failed to trigger the udev event, but this was never noticed. When this
> patch returned the error code, it caused the d-i init scripts triggering
> coldplug events to fail, which caused init to bail out, causing a kernel
> panic.
>
> In the future, when fixing error returns like this, could you please add
> a big fat printk so that hopefully things that always should have failed
> but didn't and now do can get noticed and fixed more quickly.
>
> https://bugzilla.kernel.org/show_bug.cgi?id=207695
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=983357
>
Spaming kernel logs with things that userspace can trigger is generally
a bad idea. But I understand the pain here, sorry to hear it.
Was the offending drivers ever fixed?
thanks,
greg k-h
next prev parent reply other threads:[~2021-04-29 17:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-05 11:27 [PATCH 0/2] Fix return code and improve feature check for synthetic uevents Peter Rajnoha
2018-12-05 11:27 ` [PATCH 1/2] kobject: return error code if writing /sys/.../uevent fails Peter Rajnoha
2021-04-29 13:40 ` Phillip Susi
2021-04-29 17:27 ` Greg KH [this message]
2018-12-05 11:27 ` [PATCH 2/2] kobject: add kernel/uevent_features sysfs file Peter Rajnoha
2018-12-06 15:07 ` Greg KH
2018-12-05 16:30 ` [PATCH 0/2] Fix return code and improve feature check for synthetic uevents Greg KH
2018-12-06 8:40 ` Peter Rajnoha
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