diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-18 13:41:32 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-18 13:41:32 +0100 |
| commit | d55c9d4009c7622e081cbe599c673076b9854ea1 (patch) | |
| tree | 16eaaceba5ca4351c290e97af546fe5b29b4ae61 /arch/x86/kvm/svm.c | |
| parent | 9401f2e5b0cee7a122eb05452850e0e799d32d4b (diff) | |
| download | linux-d55c9d4009c7622e081cbe599c673076b9854ea1.tar.bz2 | |
KVM: nSVM: check for EFER.SVME=1 before entering guest
EFER is set for L2 using svm_set_efer, which hardcodes EFER_SVME to 1 and hides
an incorrect value for EFER.SVME in the L1 VMCB. Perform the check manually
to detect invalid guest state.
Reported-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 08568ae9f7a1..2125c6ae5951 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3558,6 +3558,9 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) static bool nested_vmcb_checks(struct vmcb *vmcb) { + if ((vmcb->save.efer & EFER_SVME) == 0) + return false; + if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) return false; |