diff --git a/llvm/tools/llvm-readobj/COFFDumper.cpp b/llvm/tools/llvm-readobj/COFFDumper.cpp
index 6fc57e83e9c9..a216a05e96fb 100644
--- a/llvm/tools/llvm-readobj/COFFDumper.cpp
+++ b/llvm/tools/llvm-readobj/COFFDumper.cpp
@@ -687,7 +687,10 @@ void COFFDumper::initializeFileAndStringTables(StringRef Data) {
     default:
       break;
     }
-    Data = Data.drop_front(alignTo(SubSectionSize, 4));
+    uint32_t PaddedSize = alignTo(SubSectionSize, 4);
+    if (PaddedSize > Data.size())
+      error(object_error::parse_failed);
+    Data = Data.drop_front(PaddedSize);
   }
 }