diff options
| author | Avi Kivity <avi@redhat.com> | 2009-03-26 23:05:03 +0000 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2009-04-02 13:55:16 -0700 |
| commit | f438349efb8247cd0c1d453a4131b1f801bf5691 (patch) | |
| tree | 789bbee8daa22298cbc017056cb1c367366085cb /arch | |
| parent | a9620fdcb8dab4d05f5677110c54b74e7ce1d621 (diff) | |
KVM: VMX: Don't allow uninhibited access to EFER on i386
upstream 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>
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
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 7611af576829..90de4443ef41 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -928,11 +928,11 @@ 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; |