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KVM: VMX: Check cpl before emulating debug register access
authorAvi Kivity <avi@redhat.com>
Tue, 1 Sep 2009 09:03:25 +0000 (12:03 +0300)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 1 Apr 2010 22:52:24 +0000 (15:52 -0700)
commit 0a79b009525b160081d75cef5dbf45817956acf2 upstream.

Debug registers may only be accessed from cpl 0.  Unfortunately, vmx will
code to emulate the instruction even though it was issued from guest
userspace, possibly leading to an unexpected trap later.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

No differences found
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