KVM: x86: Non-canonical access using SS should cause #SS
When SS is used using a non-canonical address, an #SS exception is generated on
real hardware. KVM emulator causes a #GP instead. Fix it to behave as real x86
CPU.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4d083fb..57dc0d7 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -635,7 +635,7 @@
switch (mode) {
case X86EMUL_MODE_PROT64:
if (is_noncanonical_address(la))
- return emulate_gp(ctxt, 0);
+ goto bad;
*max_size = min_t(u64, ~0u, (1ull << 48) - la);
if (size > *max_size)