Index: lld/ELF/Writer.cpp
===================================================================
--- lld/ELF/Writer.cpp
+++ lld/ELF/Writer.cpp
@@ -2108,6 +2108,7 @@
 
 template <class ELFT> void Writer<ELFT>::writeHeader() {
   uint8_t *Buf = Buffer->getBufferStart();
+  memset(Buf, 0 , sizeof(Elf_Ehdr)+sizeof(Elf_Phdr));
   memcpy(Buf, "\177ELF", 4);
 
   // Write the ELF header.