On Mon, Jan 22, 2018 at 08:30:51AM -0800, Tejun Heo wrote:
> Hello, Steven.
>
> On Sun, Jan 21, 2018 at 09:31:08PM -0500, Steven Rostedt wrote:
> > While upgrading my system, it locked up while upgrading udev. It locked
> > up on vanilla v4.14.12, and it also locked up on debian's 4.14 kernel
> > as well. When I booted debian's 4.9 kernel, it upgraded fine.
> >
> > Note, this is my main server and not a development box. It is not
> > something I'm going to run bisects or other tests on. I don't even have
> > it logging to serial console (hence the photo). It's serials are hooked
> > to my test boxes. That is, it receives logs, it's not set up to send
> > them.
> >
> > Attached in the photo of the crash that happened when I did:
> >
> > # dpkg --configure udev
>
> It looks like the same bug which was fixed by 74d0833c659a ("cgroup:
> fix css_task_iter crash on CSS_TASK_ITER_PROC"). The bug got
> introduced durinv v4.14 cycle and triggers when cgroup1 and cgroup2
> are used at the same time, which the recent versions of systemd does
> when in cgroup1 mode.
That fix ended up in 4.14.14, so 4.14.12 is a bit too old Steven :)
greg k-h
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