X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Farchive64.c;h=5e1443932cef5e10f775cb060908766ccc36534d;hb=fda3f1174efb2fb1800e3fcb74819ba2dc9c2dd0;hp=47da4302f0d0b472c31f7a762d255d54d7467e48;hpb=07d6d2b8345ef3dc82eab49635acac9ee67dbb18;p=deliverable%2Fbinutils-gdb.git

diff --git a/bfd/archive64.c b/bfd/archive64.c
index 47da4302f0..5e1443932c 100644
--- a/bfd/archive64.c
+++ b/bfd/archive64.c
@@ -1,5 +1,5 @@
 /* Support for 64-bit archives.
-   Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   Copyright (C) 1996-2020 Free Software Foundation, Inc.
    Ian Lance Taylor, Cygnus Support
    Linker support added by Mark Mitchell, CodeSourcery, LLC.
    <mark@codesourcery.com>
@@ -47,6 +47,7 @@ _bfd_archive_64_bit_slurp_armap (bfd *abfd)
   bfd_byte *raw_armap = NULL;
   carsym *carsyms;
   bfd_size_type amt;
+  ufile_ptr filesize;
 
   ardata->symdefs = NULL;
 
@@ -66,7 +67,7 @@ _bfd_archive_64_bit_slurp_armap (bfd *abfd)
 
   if (! CONST_STRNEQ (nextname, "/SYM64/         "))
     {
-      bfd_has_map (abfd) = FALSE;
+      abfd->has_armap = FALSE;
       return TRUE;
     }
 
@@ -76,6 +77,13 @@ _bfd_archive_64_bit_slurp_armap (bfd *abfd)
   parsed_size = mapdata->parsed_size;
   free (mapdata);
 
+  filesize = bfd_get_file_size (abfd);
+  if (filesize != 0 && parsed_size > filesize)
+    {
+      bfd_set_error (bfd_error_malformed_archive);
+      return FALSE;
+    }
+
   if (bfd_bread (int_buf, 8, abfd) != 8)
     {
       if (bfd_get_error () != bfd_error_system_call)
@@ -90,54 +98,56 @@ _bfd_archive_64_bit_slurp_armap (bfd *abfd)
   ptrsize = 8 * nsymz;
 
   amt = carsym_size + stringsize + 1;
-  if (carsym_size < nsymz || ptrsize < nsymz || amt < nsymz)
+  if (/* Catch overflow in stringsize (and ptrsize) expression.  */
+      nsymz >= (bfd_size_type) -1 / 8
+      || stringsize > parsed_size
+      /* Catch overflow in carsym_size expression.  */
+      || nsymz > (bfd_size_type) -1 / sizeof (carsym)
+      /* Catch overflow in amt expression.  */
+      || amt <= carsym_size
+      || amt <= stringsize)
     {
       bfd_set_error (bfd_error_malformed_archive);
       return FALSE;
     }
-  ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt);
+  ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
   if (ardata->symdefs == NULL)
     return FALSE;
   carsyms = ardata->symdefs;
   stringbase = ((char *) ardata->symdefs) + carsym_size;
-  stringbase[stringsize] = 0;
-  stringend = stringbase + stringsize;
-
-  raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize);
-  if (raw_armap == NULL)
-    goto release_symdefs;
 
-  if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
+  raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize);
+  if (raw_armap == NULL
       || bfd_bread (stringbase, stringsize, abfd) != stringsize)
     {
       if (bfd_get_error () != bfd_error_system_call)
 	bfd_set_error (bfd_error_malformed_archive);
-      goto release_raw_armap;
+      goto release_symdefs;
     }
 
+  stringend = stringbase + stringsize;
+  *stringend = 0;
   for (i = 0; i < nsymz; i++)
     {
       carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
       carsyms->name = stringbase;
-      if (stringbase < stringend)
-	stringbase += strlen (stringbase) + 1;
+      stringbase += strlen (stringbase);
+      if (stringbase != stringend)
+	++stringbase;
       ++carsyms;
     }
-  *stringbase = '\0';
 
   ardata->symdef_count = nsymz;
   ardata->first_file_filepos = bfd_tell (abfd);
   /* Pad to an even boundary if you have to.  */
   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
 
-  bfd_has_map (abfd) = TRUE;
+  abfd->has_armap = TRUE;
   bfd_release (abfd, raw_armap);
 
   return TRUE;
 
-release_raw_armap:
-  bfd_release (abfd, raw_armap);
-release_symdefs:
+ release_symdefs:
   bfd_release (abfd, ardata->symdefs);
   return FALSE;
 }