[Bug dynamic-link/20419] files with large allocated notes crash in open_verify

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20419

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c259196b5005812aa3294dbf4eeca29b266a4522

commit c259196b5005812aa3294dbf4eeca29b266a4522
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Mar 1 18:53:03 2019 +0100

    elf/tst-big-note: Improve accuracy of test [BZ #20419]

    It is possible that the link editor injects an allocated ABI tag note
    before the artificial, allocated large note in the test.  Note parsing
    in open_verify stops when the first ABI tag note is encountered, so if
    the ABI tag note comes first, the problematic code is not actually
    exercised.

    Also tweak the artificial note so that it is a syntactically valid
    4-byte aligned note, in case the link editor tries to parse notes and
    process them.

    Improves the testing part of commit 0065aaaaae51cd60210ec3a7e13.

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog              |    8 ++++++++
 elf/Makefile           |    9 +++++++--
 elf/tst-big-note-lib.S |   10 ++++++++--
 3 files changed, 23 insertions(+), 4 deletions(-)

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