[Bug network/16002] calls to getaddrinfo() can segfault with large numbers of local ipaddrs.

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16002

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=44152e4b05fcc8bae5628cdb37342d9b7bd5ac3c

commit 44152e4b05fcc8bae5628cdb37342d9b7bd5ac3c
Author: Andreas Schwab <schwab@suse.de>
Date:   Mon Mar 24 11:06:30 2014 +0100

    Account for alloca use when collecting interface addresses (bug 16002)

    To reproduce:

        # ip li add name dummy0 type dummy
        # site_id=$(head -c6 /dev/urandom | od -tx2 -An | tr ' ' ':')
        # for ((i = 0; i < 65536; i++)) do
        > ip ad ad $(printf fd80$site_id::%04x $i)/128 dev dummy0
        > done
        # (ulimit -s 900; getent ahosts localhost)
        # ip li de dummy0

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

Summary of changes:
 ChangeLog                          |    6 ++++++
 NEWS                               |    6 +++---
 sysdeps/unix/sysv/linux/check_pf.c |   32 ++++++++++++++++++++++++++++----
 3 files changed, 37 insertions(+), 7 deletions(-)

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