[Bug network/20243] Misaligned access in res_query.c HEADER struct

[danglin at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20243

John David Anglin <danglin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from John David Anglin <danglin at gcc dot gnu.org> ---
commit 05dec22d7be722987ff07aebf9690f6078b3c4e9 (HEAD -> master, origin/master,
origin/HEAD)
Author: John David Anglin <danglin@gcc.gnu.org>
Date:   Tue Mar 22 17:35:54 2022 +0000

    resolv: Fix unaligned accesses to fields in HEADER struct

    The structure HEADER is normally aligned to a word boundary but
    sometimes it needs to be accessed when aligned on a byte boundary.
    This change defines a new typedef, UHEADER, with alignment 1.
    It is used to ensure the fields are accessed with byte loads and
    stores when necessary.

    V4: Change to res_mkquery.c deleted.  Small whitespace fix.

    V5: Move UHEADER typedef to resolv/resolv-internal.h.  Replace all
    HEADER usage with UHEADER in resolv/res_send.c.

    Signed-off-by: John David Anglin <dave.anglin@bell.net>
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

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