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Created attachment 1244293 [details]
getaddrinfo.c test program originally from bug 970090

Description of problem:
getaddrinfo() call returns wrong IPv6 address if nscd is used

Version-Release number of selected component:
glibc-2.12-1.208.el6

Steps to Reproduce:
1. Install nscd and run it
2. ./getaddrinfo AF_INET6 localhost
[0 root@host ~]# ./getaddrinfo AF_INET6 localhost 
Hints family=10
host=7f00:1::, family=10 addr=7f00:1::
host=7f00:1::, family=10 addr=7f00:1::
host=7f00:1::, family=10 addr=7f00:1::
[0 root@host ~]#

Actual results:

host=7f00:1::, family=10 addr=7f00:1::
host=7f00:1::, family=10 addr=7f00:1::
host=7f00:1::, family=10 addr=7f00:1::

Expected results:

host=localhost, family=10 addr=::1
host=localhost, family=10 addr=::1
host=localhost, family=10 addr=::1

Sergey, do you know if this is a regression in glibc-2.12-1.208.el6?  Thanks.

(In reply to Florian Weimer from comment #1)
> Sergey, do you know if this is a regression in glibc-2.12-1.208.el6?  Thanks.

It is glibc-2.12-1.208.el6 regression and it is related to patch for bug 1223095.
Upstream fix: https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=8dc9751764eb1bedf06d19695524b31a16773413

I have tested the upstream fix on x86_64 host, it works.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0680.html