linux-kernel - Re: MCE boot crash in qemu

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: <1245217856.5604.16.camel@penberg-laptop>
Date:	Wed, 17 Jun 2009 08:50:56 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Vegard Nossum <vegard.nossum@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: MCE boot crash in qemu

On Mon, 2009-06-15 at 16:22 +0300, Pekka Enberg wrote:
> On Mon, 2009-06-15 at 14:52 +0200, Andi Kleen wrote:
> > x86: mce: Handle banks == 0 case in K7 quirk
> > 
> > This happens on QEMU which reports MCA capability, but no banks.
> > Without this patch there is a buffer overrun and boot ops because the code
> > would try to initialize the 0 element of a zero length kmalloc()
> > buffer.
> > 
> > Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> 
> This fixes the bug for me!
> 
> Tested-by: Pekka Enberg <penberg@...helsinki.fi>

Ingo, I hit this again in my testing after rebasing to linus/master so I
really would like this in mainline.

			Pekka

--
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/