From 09df76443e464b64eea650feee384f06d9deec88 Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Wed, 10 Dec 2014 02:10:35 +0000
Subject: [PATCH] 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223907 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AsmParser/LLLexer.cpp       |   7 ++++++-
 test/Assembler/invalid-name2.ll | Bin 0 -> 120 bytes
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 test/Assembler/invalid-name2.ll

diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index cd7f09b8933..ca3c9e8b6f8 100644
--- a/lib/AsmParser/LLLexer.cpp
+++ b/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;
diff --git a/test/Assembler/invalid-name2.ll b/test/Assembler/invalid-name2.ll
new file mode 100644
index 0000000000000000000000000000000000000000..384dee6777d805466166edf9db309eb75c3de521
GIT binary patch
literal 120
zcmW;DK?=e!5Cu@zbBa$v(S-|LrXoUU5d;^42asfngE3Q@u?Xtj6}Jywjnnz)kkydV
zcwb%$HkcNyx3d-AXeF_~a=87BC~_y6F{(uDI?NY%Q8lR?)$seq9~}7Eb1;sOTx@s*
R6V1>*Xk-EgwtuD%eE~+FBr^a2

literal 0
HcmV?d00001