diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
@@ -688,6 +688,8 @@
                   int64_t Offset) const {
     MCDisassembler *Dis = Checker.Disassembler;
     StringRef SymbolMem = Checker.getSymbolContent(Symbol);
+    if (SymbolMem.size() < Offset + Size)
+      return false;
     ArrayRef<uint8_t> SymbolBytes(SymbolMem.bytes_begin() + Offset,
                                   SymbolMem.size() - Offset);