linux-kernel - Re: general protection fault in do

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Message-ID: <20130220182432.GA32377@redhat.com>
Date:	Wed, 20 Feb 2013 13:24:32 -0500
From:	Dave Jones <davej@...hat.com>
To:	Stanislav Kinsbursky <skinsbursky@...allels.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: general protection fault in do_msgrcv  [3.8]

On Wed, Feb 20, 2013 at 12:23:22PM +0400, Stanislav Kinsbursky wrote:

 > > Pid: 887, comm: trinity-child2 Not tainted 3.8.0+ #57 Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H
 > > RIP: 0010:[<ffffffff812aebba>]  [<ffffffff812aebba>] do_msgrcv+0x22a/0x670
 > > ...
 > > Looks like Stanislav recently changed this code, so problem was likely introduced
 > > in those changes.
 > >
 > 
 > Is it easy to reproduce? Do you use KVM?

Only hit it once so far, no KVM

 > There is a NULL selinux handler bug fix by Stephen Smalley here:
 > https://lkml.org/lkml/2013/2/6/663
 > 
 > But anyway, this bug fix affects only the case, when MSG_COPY flag is set.
 > 
 > And this is not your case, I suppose?

>From my reading of the traces, I'd say not. It looks like I'm oopsing before
we even get to the SELinux hooks.

	Dave

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