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From: Chris Wright <chrisw@osdl.org>
To: Stephen Smalley <sds@epoch.ncsc.mil>
Cc: James Morris <jmorris@redhat.com>, Chris Wright <chrisw@osdl.org>,
	Thomas Bleher <bleher@informatik.uni-muenchen.de>,
	lsm <linux-security-module@wirex.com>,
	SELinux ML <selinux@tycho.nsa.gov>,
	Crispin Cowan <crispin@immunix.com>
Subject: Re: cdrecord deadlocks linux 2.6.8.1 (problem in setscheduler)
Date: Tue, 19 Oct 2004 12:02:00 -0700	[thread overview]
Message-ID: <20041019120200.D2357@build.pdx.osdl.net> (raw)
In-Reply-To: <1098211939.29525.125.camel@moss-spartans.epoch.ncsc.mil>; from sds@epoch.ncsc.mil on Tue, Oct 19, 2004 at 02:52:19PM -0400

* Stephen Smalley (sds@epoch.ncsc.mil) wrote:
> setscheduler() isn't being called from interrupt.  I changed the SELinux
> setscheduler hook to call a wrapper function to use audit_log_irq_end(),
> and exercising it immediately deadlocked the system. 
> audit_log_irq_end() -> tasklet_schedule() -> raise_softirq_irqoff() ->
> wakeup_softirqd() -> wake_up_process() is my current working guess,
> couldn't get a dump after the lockup.  No response to sysrq-t.

Can you trigger NMI?  Although i'm sure it's wakeup putting smth. on
runqueue.

thanks,
-chris
-- 
Linux Security Modules     http://lsm.immunix.org     http://lsm.bkbits.net

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  reply	other threads:[~2004-10-19 19:02 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-18 12:43 cdrecord deadlocks linux 2.6.8.1 (problem in setscheduler) Thomas Bleher
2004-10-18 13:49 ` Stephen Smalley
2004-10-18 15:03   ` James Morris
     [not found]     ` <4173F737.1070204@immunix.com>
2004-10-18 19:07       ` Stephen Smalley
2004-10-18 19:14       ` Chris Wright
     [not found]         ` <20041018214052.GB4336@immunix.com>
2004-10-19 12:14           ` Stephen Smalley
2004-10-19 16:21             ` Chris Wright
2004-10-19 18:17             ` Stephen Smalley
2004-10-19 18:27               ` Chris Wright
2004-10-19 18:36                 ` James Morris
2004-10-19 18:39                   ` Chris Wright
2004-10-19 18:52                   ` Stephen Smalley
2004-10-19 19:02                     ` Chris Wright [this message]
2004-10-19 19:14                       ` Stephen Smalley
2004-10-19 19:20                         ` Chris Wright
2004-10-19 20:09                           ` Stephen Smalley
2004-10-19 20:17                             ` Stephen Smalley
2004-10-19 20:42                               ` James Morris
2004-10-19 21:09                                 ` Chris Wright
2004-10-20 12:23                                   ` Stephen Smalley
2004-10-20 12:44                                     ` Stephen Smalley
     [not found]                                     ` <20041020154909.GA1917@immunix.com>
2004-10-20 16:01                                       ` Stephen Smalley
2004-10-20 16:07                                       ` Chris Wright
2004-10-20 17:41                                     ` Chris Wright
2004-10-20 20:05                                       ` Stephen Smalley
2004-10-21  0:28                                         ` Chris Wright
2004-10-18 19:11     ` Chris Wright
2004-10-18 14:38 ` Luke Kenneth Casson Leighton
2004-10-18 21:58   ` cdrecord patch [was: Re: cdrecord deadlocks linux 2.6.8.1 (problem in setscheduler)] Thomas Bleher
2004-10-29 19:31     ` James Carter
2004-11-01 16:18       ` Patch to make can_network stronger and remove nscd tunable Daniel J Walsh
2004-11-02 13:27         ` Russell Coker
2004-11-02 14:30           ` Daniel J Walsh
2004-11-02 14:39             ` Stephen Smalley
2004-11-02 14:44               ` Daniel J Walsh
2004-11-02 14:50               ` Daniel J Walsh
2004-11-02 15:38                 ` Russell Coker
2004-11-02 15:48             ` Russell Coker
2004-11-02 15:55               ` Daniel J Walsh
2004-11-03  5:23                 ` Russell Coker
2004-11-02 15:56               ` Daniel J Walsh
2004-11-03  0:07                 ` Thomas Bleher
2004-11-03  6:16                   ` Russell Coker
2004-11-03 16:17                   ` Daniel J Walsh
2004-11-03  5:41                 ` Russell Coker
2004-11-03 16:23                   ` Daniel J Walsh
2004-11-03 18:45                     ` Colin Walters
2004-11-03 22:13                       ` Colin Walters
2004-11-03 22:49                         ` Daniel J Walsh
2004-11-05 13:10                           ` Thomas Bleher
2004-11-05 13:38                             ` Stephen Smalley
2004-11-05 21:24                             ` James Carter
2004-11-06 10:46                               ` Thomas Bleher

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