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[Bug binutils/28055] Segment fault on nm-new -l

From: cvs-commit at gcc dot gnu.org
Subject: [Bug binutils/28055] Segment fault on nm-new -l
Date: Mon, 05 Jul 2021 12:23:23 +0000


--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Alan Modra <amodra@sourceware.org>:


commit b4c4b8aaad84853ddf1b2779a5f1bbe5be157397
Author: Alan Modra <amodra@gmail.com>
Date:   Mon Jul 5 16:31:30 2021 +0930

    PR28055, segfault in bpf special reloc function

    The testcase in this PR tickled two bugs fixed here.  output_bfd is
    NULL when a reloc special_function is called for final linking and
    when called from bfd_generic_get_relocated_section_contents.  Clearly
    using output_bfd is wrong as it results in segfaults.  Not only that,
    the endianness of the reloc field really should be that of the input.
    The second bug was not checking that the entire reloc field was
    contained in the section contents.

            PR 28055
            * elf64-bpf.c (bpf_elf_generic_reloc): Use correct bfd for bfd_put
            and bfd_put_32 calls.  Correct section limit checks.

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