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: <20061115100119.460b7a4e@localhost.localdomain>
Date:	Wed, 15 Nov 2006 10:01:19 -0800
From:	Stephen Hemminger <shemminger@...l.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: sleeping functions called in invalid context during resume

On Wed, 15 Nov 2006 10:33:54 +0100
Ingo Molnar <mingo@...e.hu> wrote:

> 
> * Andrew Morton <akpm@...l.org> wrote:
> 
> > >  [<ffffffff80215059>] vfs_write+0xce/0x174
> > >  [<ffffffff802159a5>] sys_write+0x45/0x6e
> > >  [<ffffffff802593de>] system_call+0x7e/0x83
> > > DWARF2 unwinder stuck at system_call+0x7e/0x83
> > > 
> > > Leftover inexact backtrace:
> > 
> > Could mean that someone somewhere forgot to release a spinlock.
> > 
> > Ingo had a patch which would find the culprit (preempt-tracing.patch).
> > 
> > Does it still live?
> 
> if it's really a spinlock/rwlock release that was missed, then i've got 
> good news: we already have that debugging infrastructure, it's called 
> lockdep :-)
> 
> The patch below makes use of that capability of lockdep for all 
> stackdumps that are printed to the console. Stephen, please apply this 
> patch, enable CONFIG_PROVE_LOCKING and try to trigger another message. 
> 
> 	Ingo

I tried but with CONFIG_PROVE_LOCKING, resume gets stuck in an infinite
loop backtracing to the console.  Unfortunately, the serial console isn't up
at that point so it it isn't capturable. 
-
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