linux-kernel - Re: [bug] latest -git boot hang

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Date:	Tue, 14 Oct 2008 17:12:36 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>
Subject: Re: [bug] latest -git boot hang


* Stephen Smalley <sds@...ho.nsa.gov> wrote:

> > Right now i have about 40 such annotations for -tip testing:
> > 
> >   fs/Kconfig:	depends on BROKEN_BOOT_ALLOWED
> >   fs/Kconfig:	depends on BROKEN_BOOT_ALLOWED
> >   security/selinux/Kconfig:	depends on BROKEN_BOOT_ALLOWED
> >   security/smack/Kconfig:	depends on BROKEN_BOOT_ALLOWED
> >   security/Kconfig:	depends on BROKEN_BOOT_ALLOWED
> 
> What in particular under fs/Kconfig and security/*Kconfig falls into 
> this category, and why?  What constitutes a "generic distro bootup"? 
> For distros that support SELinux, it obviously shouldn't break the 
> bootup (there have of course been cases where it has, but those were 
> bugs that have been addressed, including the recent /proc/net 
> breakage), and for other distros, it should yield no effect as no 
> policy will be loaded and thus SELinux just allows everything.

got this one for rootplug:

--- linux.orig/security/Kconfig
+++ linux/security/Kconfig
@@ -93,6 +93,11 @@ config SECURITY_FILE_CAPABILITIES
 config SECURITY_ROOTPLUG
        bool "Root Plug Support"
        depends on USB=y && SECURITY
+
+       # fails with hard-to-debug "could not find init" boot failure
+       depends on BROKEN_BOOT_ALLOWED
+       select BROKEN_BOOT


and this one:

--- linux.orig/security/selinux/Kconfig
+++ linux/security/selinux/Kconfig
@@ -97,6 +97,11 @@ config SECURITY_SELINUX_CHECKREQPROT_VAL
 config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
        bool "NSA SELinux enable new secmark network controls by default"
        depends on SECURITY_SELINUX
+
+       # old system booted up with this cannot ssh out
+       depends on BROKEN_BOOT_ALLOWED
+       select BROKEN_BOOT

i also have this temporary annotation:

--- linux.orig/security/smack/Kconfig
+++ linux/security/smack/Kconfig
@@ -1,6 +1,9 @@
 config SECURITY_SMACK
        bool "Simplified Mandatory Access Control Kernel Support"
        depends on NETLABEL && SECURITY_NETWORK
+       # breaks networking (TCP connections)
+       depends on BROKEN_BOOT_ALLOWED
+       select BROKEN_BOOT
        default n
        help
          This selects the Simplified Mandatory Access Control Kernel.

has this problem been fixed? A test is only a success if the freshly 
booted kernel can autonomously ssh out over a real network and can 
indicate success to the QA server. I've got a good mix of old and new 
distros as well.

	Ingo
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