From 0e9da8736a809f342f1210be38b01b5bc2da4d96 Mon Sep 17 00:00:00 2001
From: Nguyen Anh Quynh <aquynh@gmail.com>
Date: Tue, 16 Jun 2015 11:57:22 +0800
Subject: [PATCH] x86: treat prefix-only sequences of bytes as invalid code.
 this fixes a NDP reported by @felixgr

---
 arch/X86/X86DisassemblerDecoder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/X86/X86DisassemblerDecoder.c b/arch/X86/X86DisassemblerDecoder.c
index 19a26eed..9421c02f 100644
--- a/arch/X86/X86DisassemblerDecoder.c
+++ b/arch/X86/X86DisassemblerDecoder.c
@@ -437,7 +437,7 @@ static int readPrefixes(struct InternalInstruction *insn)
 
 		/* If we fail reading prefixes, just stop here and let the opcode reader deal with it */
 		if (consumeByte(insn, &byte))
-			break;
+			return -1;
 
 		if (insn->readerCursor - 1 == insn->startLocation
 				&& (byte == 0xf2 || byte == 0xf3)) {