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[Bug ld/24042] Global-buffer-overflow problem in function output_rel_fin

From: cvs-commit at gcc dot gnu.org
Subject: [Bug ld/24042] Global-buffer-overflow problem in function output_rel_find in eelf_x86_64.c, as demonstrated by "ld -E"
Date: Mon, 31 Dec 2018 07:28:03 +0000


--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Alan Modra <address@hidden>:


commit 8fd04a4255376036e85c4e80d430b44ec4b06c64
Author: Alan Modra <address@hidden>
Date:   Mon Dec 31 17:06:25 2018 +1030

    PR24042, Global-buffer-overflow problem in output_rel_find

    place_orphan handled ELF SHT_REL/SHT_RELA specially, output_rel_find
    didn't.  This mismatch was a bug and also meant it was possible to
    craft an object where ld accessed section->name out of bounds.

        PR 24042
        * emultempl/elf32.em (output_rel_find): Drop "sec" param.  Add
        (gld${EMULATION_NAME}_place_orphan): Use sh_type to calculate
        "rela" param of output_rel_find when ELF.  Tidy uses of elfinput.

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