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KVM: VMX: Don't allow uninhibited access to EFER on i386
authorAvi Kivity <avi@redhat.com>
Mon, 23 Mar 2009 20:13:44 +0000 (22:13 +0200)
committerAvi Kivity <avi@redhat.com>
Tue, 24 Mar 2009 09:03:15 +0000 (11:03 +0200)
commit16175a796d061833aacfbd9672235f2d2725df65
tree69e1fb9865b3331f8a933fa9198b9245a914ea34tree | snapshot (tar.gz zip)
parentbc7a8660df62da3fb5cad025322eda75fbee8731commit | diff
KVM: VMX: Don't allow uninhibited access to EFER on i386

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>
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/vmx.c diff | blob | blame | history