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More fixes for invalid memory accesses triggered by fuzzed binaries.

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PR binutils/17512
	* nm.c (print_symbol): Add 'is_synthetic' parameter.  Use it to
	help initialize the info.elfinfo field.
	(print_size_symbols): Add 'synth_count' parameter.  Use it to set
	the is_synthetic parameter when calling print_symbol.
	(print_symbols): Likewise.
	(display_rel_file): Pass synth_count to printing function.
	(display_archive): Break loop if the last archive displayed
	matches the current archive.
	* size.c (display_archive): Likewise.

	* archive.c (do_slurp_bsd_armap): Make sure that the parsed sized
	is at least big enough for the header to be read.
	* elf32-i386.c (elf_i386_get_plt_sym_val): Skip unknown relocs.
	* mach-o.c (bfd_mach_o_get_synthetic_symtab): Add range checks.
	(bfd_mach_o_read_command): Prevetn duplicate error messages about
	unrecognized commands.
	* syms.c (_bfd_stab_section_find_nearest_line): Add range checks
	when indexing into the string table.
This commit is contained in:
Nick Clifton
2015-01-05 23:13:50 +00:00
parent 82b1b41bcd
commit 896ca09813
9 changed files with 150 additions and 39 deletions
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3
bfd/archive.c
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@@ -903,7 +903,8 @@ do_slurp_bsd_armap (bfd *abfd)
parsed_size = mapdata->parsed_size;
free (mapdata);
/* PR 17512: file: 883ff754. */
if (parsed_size == 0)
/* PR 17512: file: 0458885f. */
if (parsed_size < 4)
return FALSE;
raw_armap = (bfd_byte *) bfd_zalloc (abfd, parsed_size);