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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: Tue, 06 Jan 2015 16:08:21 +0000


--- Comment #148 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
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      from  fce10a8494efa8faec67b718f25e06d3d71694b3 (commit)

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

commit 85880250e591a51624d24db653aaace0c5ce5943
Author: Nick Clifton <address@hidden>
Date:   Tue Jan 6 16:06:45 2015 +0000

    Fixes for memory access violations in the coffdump program.

        PR binutils/17512
        * coffdump.c (dump_coff_section): Check for a symbol being
        available before printing its name.
        (main): Check the return value from coff_grok.
        * coffgrok.c: Reformat and tidy.
        Add range checks to most functions.
        (coff_grok): Return NULL if the input bfd is not in a COFF
        * coffgrok.h: Reformat and tidy.
        (struct coff_section): Change the nrelocs field to unsigned.
        * srconv.c (main): Check the return value from coff_grok.

        * coff-i860.c (CALC_ADDEND): Always set an addend value.
        * tekhex.c (getvalue): Add an end pointer parameter.  Use it to
        avoid reading off the end of the buffer.
        (getsym): Likewise.
        (first_phase): Likewise.
        (pass_over): Pass an end pointer to the invoked function.


Summary of changes:
 bfd/ChangeLog       |   10 ++
 bfd/coff-i860.c     |    5 +-
 bfd/tekhex.c        |   33 +++---
 binutils/ChangeLog  |   14 ++
 binutils/coffdump.c |   20 ++--
 binutils/coffgrok.c |  351 ++++++++++++++++++++++++++++++++++-----------------
 binutils/coffgrok.h |  255 ++++++++++++++++++-------------------
 binutils/srconv.c   |   10 +-
 8 files changed, 421 insertions(+), 277 deletions(-)

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