From 9c71771875b4bbea1a47f1327fa32875c31d57ce Mon Sep 17 00:00:00 2001
From: flobernd <flobernd@users.noreply.github.com>
Date: Thu, 11 Jan 2018 02:39:43 +0100
Subject: [PATCH] Added missing `LOCK` prefix check for `3DNOW` encoded
 instructions

---
 src/Decoder.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Decoder.c b/src/Decoder.c
index 0d7a652..5c1f6c7 100644
--- a/src/Decoder.c
+++ b/src/Decoder.c
@@ -3660,6 +3660,10 @@ static ZydisStatus ZydisNodeHandlerOpcode(ZydisDecoderContext* context,
             switch (instruction->opcode)
             {
             case 0x0F:
+                if (instruction->raw.prefixes.hasF0)
+                {
+                    return ZYDIS_STATUS_ILLEGAL_LOCK;
+                }
                 instruction->encoding = ZYDIS_INSTRUCTION_ENCODING_3DNOW;
                 instruction->opcodeMap = ZYDIS_OPCODE_MAP_0F0F;
                 break;