Fix buffer overflow in Lexer
Summary:
Fix PR22407, where the Lexer overflows the buffer when parsing
#include<\
(end of file after slash)
Test Plan:
Added a test that will trigger in asan build.
This case is also covered by the clang-fuzzer bot.
Reviewers: rnk
Reviewed By: rnk
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D9489
llvm-svn: 236466
diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
index a3b520b..3f89ea6 100644
--- a/clang/lib/Lex/Lexer.cpp
+++ b/clang/lib/Lex/Lexer.cpp
@@ -1854,7 +1854,7 @@
char C = getAndAdvanceChar(CurPtr, Result);
while (C != '>') {
// Skip escaped characters.
- if (C == '\\') {
+ if (C == '\\' && CurPtr < BufferEnd) {
// Skip the escaped character.
getAndAdvanceChar(CurPtr, Result);
} else if (C == '\n' || C == '\r' || // Newline.