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[Bug binutils/17512] libbfd/binutils: crashes on fuzzed samples

From: cvs-commit at gcc dot gnu.org
Subject: [Bug binutils/17512] libbfd/binutils: crashes on fuzzed samples
Date: Mon, 05 Jan 2015 23:15:20 +0000


--- Comment #145 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
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       via  896ca0981329171639b1fe0b934393a79ef4fdfb (commit)
      from  82b1b41bcdc6d01fdbd94b246e24a8a8f8c2bddd (commit)

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- Log -----------------------------------------------------------------

commit 896ca0981329171639b1fe0b934393a79ef4fdfb
Author: Nick Clifton <address@hidden>
Date:   Mon Jan 5 23:13:50 2015 +0000

    More fixes for invalid memory accesses triggered by fuzzed binaries.

        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.


Summary of changes:
 bfd/ChangeLog      |   12 +++++++++
 bfd/archive.c      |    3 +-
 bfd/elf32-i386.c   |    5 ++-
 bfd/elfcode.h      |    3 +-
 bfd/mach-o.c       |   61 +++++++++++++++++++++++++++++++++++---------
 bfd/syms.c         |   12 +++++++++
 binutils/ChangeLog |   13 +++++++++
 binutils/nm.c      |   71 ++++++++++++++++++++++++++++++++++++---------------
 binutils/size.c    |    9 ++++++-
 9 files changed, 150 insertions(+), 39 deletions(-)

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