From: Avi Kivity <avi@redhat.com>
Date: Thu, 6 Aug 2009 17:39:58 +0000 (-0300)
Subject: KVM: VMX: Don't allow uninhibited access to EFER on i386
X-Git-Tag: v2.6.27.32~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9829a7c1ab1eef1a32498a2f627155cc0e8a8e65;p=pandora-kernel.git

KVM: VMX: Don't allow uninhibited access to EFER on i386

(cherry picked from commit 16175a796d061833aacfbd9672235f2d2725df65)

vmx_set_msr() does not allow i386 guests to touch EFER, but they can still
do so through the default: label in the switch.  If they set EFER_LME, they
can oops the host.

Fix by having EFER access through the normal channel (which will check for
EFER_LME) even on i386.

Reported-and-tested-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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