KVM: x86: fix KVM_SET_XCRS loop



The loop was always using 0 as the index.  This means that
any rubbish after the first element of the array went undetected.
It seems reasonable to assume that no KVM userspace did that.

Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 46c34cb0

arch/x86/kvm/x86.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -3064,9 +3064,9 @@ static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu,

		for (i = 0; i < guest_xcrs->nr_xcrs; i++)
		/* Only support XCR0 currently */
		if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) {
		if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) {
		r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK,
		guest_xcrs->xcrs[0].value);
		guest_xcrs->xcrs[i].value);
		break;
		}
		if (r)