diff -rup binutils.orig/bfd/aoutx.h binutils-2.27/bfd/aoutx.h
--- binutils.orig/bfd/aoutx.h	2019-01-14 16:10:59.344958851 +0000
+++ binutils-2.27/bfd/aoutx.h	2019-01-14 16:11:46.893598783 +0000
@@ -118,6 +118,7 @@ DESCRIPTION
 #define KEEPIT udata.i
 
 #include "sysdep.h"
+#include <limits.h>
 #include "bfd.h"
 #include "safe-ctype.h"
 #include "bfdlink.h"
@@ -2465,6 +2466,8 @@ NAME (aout, canonicalize_reloc) (bfd *ab
 long
 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
 {
+  bfd_size_type count;
+
   if (bfd_get_format (abfd) != bfd_object)
     {
       bfd_set_error (bfd_error_invalid_operation);
@@ -2472,26 +2475,25 @@ NAME (aout, get_reloc_upper_bound) (bfd
     }
 
   if (asect->flags & SEC_CONSTRUCTOR)
-    return sizeof (arelent *) * (asect->reloc_count + 1);
-
-  if (asect == obj_datasec (abfd))
-    return sizeof (arelent *)
-      * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
-	 + 1);
-
-  if (asect == obj_textsec (abfd))
-    return sizeof (arelent *)
-      * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
-	 + 1);
-
-  if (asect == obj_bsssec (abfd))
-    return sizeof (arelent *);
-
-  if (asect == obj_bsssec (abfd))
-    return 0;
+    count = asect->reloc_count;
+  else if (asect == obj_datasec (abfd))
+    count = exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
+  else if (asect == obj_textsec (abfd))
+    count = exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
+  else if (asect == obj_bsssec (abfd))
+    count = 0;
+  else
+    {
+      bfd_set_error (bfd_error_invalid_operation);
+      return -1;
+    }
 
-  bfd_set_error (bfd_error_invalid_operation);
-  return -1;
+  if (count >= LONG_MAX / sizeof (arelent *))
+    {
+      bfd_set_error (bfd_error_file_too_big);
+      return -1;
+    }
+  return (count + 1) * sizeof (arelent *);
 }
 
 long
diff -rup binutils.orig/bfd/elf.c binutils-2.27/bfd/elf.c
--- binutils.orig/bfd/elf.c	2019-01-14 16:10:59.331958950 +0000
+++ binutils-2.27/bfd/elf.c	2019-01-14 16:11:52.525556135 +0000
@@ -35,6 +35,7 @@ SECTION
 /* For sparc64-cross-sparc32.  */
 #define _SYSCALL32
 #include "sysdep.h"
+#include <limits.h>
 #include "bfd.h"
 #include "bfdlink.h"
 #include "libbfd.h"
@@ -7769,11 +7770,16 @@ Unable to find equivalent output section
 long
 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
 {
-  long symcount;
+  bfd_size_type symcount;
   long symtab_size;
   Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
 
   symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+  if (symcount >= LONG_MAX / sizeof (asymbol *))
+    {
+      bfd_set_error (bfd_error_file_too_big);
+      return -1;
+    }
   symtab_size = (symcount + 1) * (sizeof (asymbol *));
   if (symcount > 0)
     symtab_size -= sizeof (asymbol *);
@@ -7784,7 +7790,7 @@ _bfd_elf_get_symtab_upper_bound (bfd *ab
 long
 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
 {
-  long symcount;
+  bfd_size_type symcount;
   long symtab_size;
   Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
 
@@ -7795,6 +7801,11 @@ _bfd_elf_get_dynamic_symtab_upper_bound
     }
 
   symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+  if (symcount >= LONG_MAX / sizeof (asymbol *))
+    {
+      bfd_set_error (bfd_error_file_too_big);
+      return -1;
+    }
   symtab_size = (symcount + 1) * (sizeof (asymbol *));
   if (symcount > 0)
     symtab_size -= sizeof (asymbol *);
@@ -7864,7 +7875,7 @@ _bfd_elf_canonicalize_dynamic_symtab (bf
 long
 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
 {
-  long ret;
+  bfd_size_type count;
   asection *s;
 
   if (elf_dynsymtab (abfd) == 0)
@@ -7873,15 +7884,20 @@ _bfd_elf_get_dynamic_reloc_upper_bound (
       return -1;
     }
 
-  ret = sizeof (arelent *);
+  count = 1;
   for (s = abfd->sections; s != NULL; s = s->next)
     if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
 	&& (elf_section_data (s)->this_hdr.sh_type == SHT_REL
 	    || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
-      ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
-	      * sizeof (arelent *));
-
-  return ret;
+      {
+	count += s->size / elf_section_data (s)->this_hdr.sh_entsize;
+	if (count > LONG_MAX / sizeof (arelent *))
+	  {
+	    bfd_set_error (bfd_error_file_too_big);
+	    return -1;
+	  }
+      }
+  return count * sizeof (arelent *);
 }
 
 /* Canonicalize the dynamic relocation entries.  Note that we return the