From 6f3be2e155193c12f7da1d78a780f8644fd8b3f5 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Wed, 10 Dec 2014 02:10:35 +0000
Subject: AsmParser: Don't allow null bytes in BB labels

Since Value objects can't have null bytes in their name, we shouldn't
allow them in the labels of basic blocks.

llvm-svn: 223907
---
 llvm/lib/AsmParser/LLLexer.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/AsmParser')

diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index cd7f09b8933..ca3c9e8b6f8 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -393,7 +393,12 @@ lltok::Kind LLLexer::LexQuote() {
 
   if (CurPtr[0] == ':') {
     ++CurPtr;
-    kind = lltok::LabelStr;
+    if (StringRef(StrVal).find_first_of(0) != StringRef::npos) {
+      Error("Null bytes are not allowed in names");
+      kind = lltok::Error;
+    } else {
+      kind = lltok::LabelStr;
+    }
   }
 
   return kind;
-- 
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