Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -1216,9 +1216,13 @@
     return;
   }
 
+  uintX_t T = Off;
   Off = getFileAlignment<ELFT>(Off, Sec);
   Sec->setFileOffset(Off);
   Off += Sec->getSize();
+  if (T > Off)
+    fatal("attemp to set offset for " + Sec->getName() +
+          " failed: output is too large");
 }
 
 template <class ELFT> void Writer<ELFT>::assignFileOffsetsBinary() {
@@ -1381,6 +1385,8 @@
 }
 
 template <class ELFT> void Writer<ELFT>::openFile() {
+  if (FileSize > SIZE_MAX)
+    fatal("output file size is too large for this configuration");
   ErrorOr<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
       FileOutputBuffer::create(Config->OutputFile, FileSize,
                                FileOutputBuffer::F_executable);
Index: test/ELF/invalid/too-large-output-i386.s
===================================================================
--- test/ELF/invalid/too-large-output-i386.s
+++ test/ELF/invalid/too-large-output-i386.s
@@ -0,0 +1,7 @@
+# REQUIRES: x86
+
+## too-large-output-i386.elf contains section with address align.
+## of 0xFFFFFFFF. Total file size calculation overflows because of that.
+# RUN: not ld.lld -shared %S/Inputs/too-large-output-i386.elf -o %t 2>&1 \
+# RUN:  | FileCheck %s
+# CHECK: attemp to set offset for .text1 failed: output is too large