lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20080911195708.f975e9b6.akpm@linux-foundation.org>
Date:	Thu, 11 Sep 2008 19:57:08 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	j_kernel@...litt.com
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 11543] New: kernel panic: softlockup in
 tick_periodic() ???

On Thu, 11 Sep 2008 16:54:58 -1000 j_kernel@...litt.com wrote:

> > The panic code called the kexec code which called mutex_trylock() which
> > called spin_lock_mutex() which then stupidly went and blurted a load of
> > debug stuff because of in_interrupt().
> > 
> > Something like this:
> > 
> > --- a/include/linux/debug_locks.h~a
> > +++ a/include/linux/debug_locks.h
> > @@ -17,7 +17,7 @@ extern int debug_locks_off(void);
> >  ({									\
> >  	int __ret = 0;							\
> >  									\
> > -	if (unlikely(c)) {						\
> > +	if (!oops_in_progress && unlikely(c)) {				\
> >  		if (debug_locks_off() && !debug_locks_silent)		\
> >  			WARN_ON(1);					\
> >  		__ret = 1;						\
> > _
> > 
> > might prevent the debugging code from preventing us from finding bugs :(
> 
> Do you want me to give that patch a try or sit tight for a bit?

It's be good if you can try it please, see if we can get a cleaner
trace.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ