Null SS is valid in long mode; allow loading it. Signed-off-by: Avi Kivity <avi@xxxxxxxxxx> --- arch/x86/kvm/emulate.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index db95a55..9a95132 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1325,7 +1325,9 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt, } /* NULL selector is not valid for TR, CS and SS */ - if ((seg == VCPU_SREG_CS || seg == VCPU_SREG_SS || seg == VCPU_SREG_TR) + if ((seg == VCPU_SREG_CS + || (seg == VCPU_SREG_SS && ctxt->mode != X86EMUL_MODE_PROT64) + || seg == VCPU_SREG_TR) && null_selector) goto exception; -- 1.7.10.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
