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[Bug network/16743] getaddrinfo uses uninitialized data when processing nscd answer


https://sourceware.org/bugzilla/show_bug.cgi?id=16743

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a071766ebfd853179ac39f9773f894029bf86d36

commit a071766ebfd853179ac39f9773f894029bf86d36
Author: Andreas Schwab <schwab@suse.de>
Date:   Thu Mar 20 15:05:25 2014 +0100

    Fix use of half-initialized result in getaddrinfo when using nscd (bug
16743)

    This fixes a bug in the way the results from __nscd_getai are collected:
    for every returned result a new entry is first added to the
    gaih_addrtuple list, but if that result doesn't match the request this
    entry remains uninitialized.  So for this non-matching result an extra
    result with uninitialized content is returned.

    To reproduce (with nscd running):

        $ getent ahostsv4 localhost
        127.0.0.1       STREAM localhost
        127.0.0.1       DGRAM
        127.0.0.1       RAW
        (null)          STREAM
        (null)          DGRAM
        (null)          RAW

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

Summary of changes:
 ChangeLog                   |    6 ++++++
 NEWS                        |    3 ++-
 sysdeps/posix/getaddrinfo.c |    8 ++++++++
 3 files changed, 16 insertions(+), 1 deletions(-)

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