Fix edge case when Start overflowed in 32 bit mode
llvm-svn: 226229
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index a367a49..4f54407 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -336,8 +336,9 @@
StringRef StringTable = getStringTableData();
MachO::nlist_base Entry = getSymbolTableEntryBase(this, Symb);
const char *Start = &StringTable.data()[Entry.n_strx];
- if (Start >= getData().end())
- report_fatal_error("Symbol name entry points past end of file.");
+ if (Start < getData().begin() || Start >= getData().end())
+ report_fatal_error(
+ "Symbol name entry points before beginning or past end of file.");
Res = StringRef(Start);
return object_error::success;
}