linux-kernel - Re: linux-3.7.1: disable and reenable NMI watchdog => panic

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] [day] [month] [year] [list]

Message-ID: <20130111133422.GA21882@liondog.tnic>
Date:	Fri, 11 Jan 2013 14:34:22 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Alexander E. Patrakov" <patrakov@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: linux-3.7.1: disable and reenable NMI watchdog => panic

On Sun, Jan 06, 2013 at 11:53:41PM +0600, Alexander E. Patrakov wrote:
> As illustrated by the screen photo [1] (sorry for bad quality),
> disabling and then reenabling the NMI watchdog panics the kernel
> (3.7.1). This is reproducible in qemu-kvm as well, but I could not get
> the nice panic message to pop up there (most of the time, the real
> machine just locks up, too). This bug is rather important, as
> laptop-mode-tools, by default, try to reenable this NMI watchdog when
> AC power appears, and this is how I caught the bug the first time.
> 
> [1] http://postimage.org/image/mjjifj1ip/

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=3935e89505a1c3ab3f3b0c7ef0eae54124f48905

should fix it.

See also thread here: http://marc.info/?i=20130109120732.GA8016@liondog.tnic

HTH.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--
--
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/