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| author | Avi Kivity <avi@redhat.com> | 2009-03-23 22:13:44 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-03-24 11:03:15 +0200 |
| commit | 16175a796d061833aacfbd9672235f2d2725df65 (patch) | |
| tree | 69e1fb9865b3331f8a933fa9198b9245a914ea34 /arch | |
| parent | bc7a8660df62da3fb5cad025322eda75fbee8731 (diff) | |
| download | linux-16175a796d061833aacfbd9672235f2d2725df65.tar.bz2 | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 48063a0aa243..bb481330716f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -936,11 +936,11 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) int ret = 0; switch (msr_index) { -#ifdef CONFIG_X86_64 case MSR_EFER: vmx_load_host_state(vmx); ret = kvm_set_msr_common(vcpu, msr_index, data); break; +#ifdef CONFIG_X86_64 case MSR_FS_BASE: vmcs_writel(GUEST_FS_BASE, data); break; |