More fixes for buffer overruns instigated by corrupt binaries.

	PR binutils/17512
	* objdump.c (slurp_symtab): Fail gracefully if the table could not
	be read.
	(dump_relocs_in_section): Likewise.

	* aoutx.h (slurp_symbol_table): Check that computed table size is
	not bigger than the file from which is it being read.
	(slurp_reloc_table): Likewise.
	* coffcode.h (coff_slurp_line_table): Remove unneeded local
	'warned'.  Do not try to print the details of a symbol with an
	invalid index.
	* coffgen.c (make_a_sectiobn_from_file): Check computed string
	index against length of string table.
	(bfd_coff_internal_syment_name): Check read in string offset
	against length of string table.
	(build_debug_section): Return a pointer to the section used.
	(_bfd_coff_read_string_table): Store the length of the string
	table in the coff_tdata structure.
	(bfd_coff_free_symbols): Set the length of the string table to
	zero when it is freed.
	(coff_get_normalized_symtab): Check offsets against string table
	or data table lengths as appropriate.
	* cofflink.c (_bfd_coff_link_input_bfd): Check offset against
	length of string table.
	* compress.c (bfd_get_full_section_contents): Check computed size
	against the size of the file.
	* libcoff-in.h (obj_coff_strings_len): Define.
	(struct coff_tdata): Add strings_len field.
	* libcoff.h: Regenerate.
	* peXXigen.c (pe_print_debugdata): Do not attempt to print the
	data if the debug section is too small.
	* xcofflink.c (xcoff_link_input_bfd):  Check offset against
	length of string table.

1 files changed, 8 insertions, 1 deletions

diff --git a/bfd/peXXigen.c b/bfd/peXXigen.c
index 1a5cb31..f1a1189 100644
--- a/bfd/peXXigen.c
+++ b/bfd/peXXigen.c
@@ -2514,6 +2514,13 @@ pe_print_debugdata (bfd * abfd, void * vfile)
                section->name);
       return TRUE;
     }
+  else if (section->size < size)
+    {
+      fprintf (file,
+               _("\nError: section %s contains the debug data starting address but it is too small\n"),
+               section->name);
+      return FALSE;
+    }
 
   fprintf (file, _("\nThere is a debug directory in %s at 0x%lx\n\n"),
 	   section->name, (unsigned long) addr);
@@ -2523,7 +2530,7 @@ pe_print_debugdata (bfd * abfd, void * vfile)
   fprintf (file,
 	   _("Type                Size     Rva      Offset\n"));
 
-  /* Read the whole section. */
+  /* Read the whole section.  */
   if (!bfd_malloc_and_get_section (abfd, section, &data))
     {
       if (data != NULL)