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: <20080321183149.GB15355@kernel.dk>
Date:	Fri, 21 Mar 2008 19:31:50 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	linux-kernel@...r.kernel.org, npiggin@...e.de, paulus@...ba.org,
	tglx@...utronix.de, mingo@...hat.com
Subject: Re: [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single()

On Fri, Mar 21 2008, Luck, Tony wrote:
> > When/if more archs are converted, it'll of course look even better.
> > Comments? I've verified that this builts and boots on x86, x86-64
> > and powerpc. IA64 may still need a one-liner change, I don't have
> > access to that platform anymore so I can't verify that myself. It
> > does build, however :-)
> 
> Can you give me a clue as to which line needs the one-liner ... although
> it builds cleanly for IA64 it panics with a dereference NULL fault. It

My thinking was that it may need a bit of help to ensure that the init
function for single call data works,
kernel/smp.c:init_call_single_data() specifically. It may be run before
the arch code has setup all CPU related structures, not sure...

> looks like we were in the list_add_tail(&data->list, &dst->list) code.

Is it data or dst being NULL? Looking at your trace, it must be dst.
Which makes me believe that it is indeed a missing call of the above
function at the right time. So some help would be accepted there :)

-- 
Jens Axboe

--
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