Commit 660696d1 authored by Gleb Natapov's avatar Gleb Natapov
Browse files

KVM: X86 emulator: fix source operand decoding for 8bit mov[zs]x instructions



Source operand for one byte mov[zs]x is decoded incorrectly if it is in
high byte register. Fix that.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent d1fa0352
......@@ -4172,6 +4172,10 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
break;
case OpMem8:
ctxt->memop.bytes = 1;
if (ctxt->memop.type == OP_REG) {
ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm, 1);
fetch_register_operand(&ctxt->memop);
}
goto mem_common;
case OpMem16:
ctxt->memop.bytes = 2;
......
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