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[Bug libc/18023] extend_alloca is broken (questionable pointer comparison, horrible machine code)


https://sourceware.org/bugzilla/show_bug.cgi?id=18023

--- Comment #11 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
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The branch, master has been updated
       via  6d7aa2b531088c3a277911534179975eb2622954 (commit)
      from  71aa429b029fdb6f9e65d44050388b51eca460d6 (commit)

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6d7aa2b531088c3a277911534179975eb2622954

commit 6d7aa2b531088c3a277911534179975eb2622954
Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Jan 24 15:40:29 2018 -0200

    getlogin_r: switch Linux variant to struct scratch_buffer

        [BZ #18023]
        * sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid):
        Use scratch_buffer instead of extend_alloca.

    Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

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

Summary of changes:
 ChangeLog                            |    6 ++++++
 sysdeps/unix/sysv/linux/getlogin_r.c |   34 +++++++++++++---------------------
 2 files changed, 19 insertions(+), 21 deletions(-)

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