linux-kernel - Re: [Regression?] 1ea0ce4069 ("selinux: allow changing labels for cgroupfs") stops Android from booting

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Date:   Thu, 23 Feb 2017 19:01:11 -0500
From:   Paul Moore <paul@...l-moore.com>
To:     John Stultz <john.stultz@...aro.org>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Jeffrey Vander Stoep <jeffv@...gle.com>
Cc:     Antonio Murdaca <amurdaca@...hat.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        Nick Kralevich <nnk@...gle.com>
Subject: Re: [Regression?] 1ea0ce4069 ("selinux: allow changing labels for
 cgroupfs") stops Android from booting

On Thu, Feb 23, 2017 at 1:43 PM, John Stultz <john.stultz@...aro.org> wrote:
> Hey folks,
>    I've not been able to figure out why yet, but I wanted to raise the
> issue that last night I found I couldn't boot Android on my Hikey
> board with Linus' HEAD kernel. It seems to cause logd to crash
> repeatedly so I'm not able to get debug info from logcat.
>
> I do see the following over and over on the console:
>
> [   12.505838] init: computing context for service 'logd'
> [   12.506355] init: starting service 'logd'...
> [   12.507683] init: property_set("ro.boottime.logd", "12500792498")
> failed: property already set
> [   12.508701] init: Created socket '/dev/socket/logd', mode 666, user
> 1036, group 1036
> [   12.509294] init: Created socket '/dev/socket/logdr', mode 666,
> user 1036, group 1036
> [   12.509891] init: Created socket '/dev/socket/logdw', mode 222,
> user 1036, group 1036
> [   12.510132] init: Opened file '/proc/kmsg', flags 0
> [   12.510187] init: Opened file '/dev/kmsg', flags 1
> [   12.510353] init: couldn't write 1941 to
> /dev/cpuset/system-background/tasks: No such file or directory
> [   12.533046] init: Service 'logd' (pid 1941) exited with status 255
>
>
> I did some bisection and narrowed it down to 1ea0ce4069 ("selinux:
> allow changing labels for cgroupfs"), which was merged in yesterday.
> I've not yet been able to figure out the root cause, but reverting
> that patch makes things work again.
>
> So I wanted to raise the issue here so folks were aware.
>
> If there is anything folks want me to test or try, please let me know.

Unfortunately I don't have an Android test system to play with, have
any of the SEAndroid folks on the To/CC line seen a similar problem?

-- 
paul moore
www.paul-moore.com