[Bug libc/12885] New: getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[Bug libc/12885] New: getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[arekm at maven dot pl]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

           Summary: getaddrinfo with hints.ai_family=AF_INET6 succeeds
                    even if resolving entry with no AAAA record
           Product: glibc
           Version: 2.14
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: arekm@maven.pl


Created attachment 5792
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5792
test case

glibc 2.14 getaddrinfo succeeds resolving dns entry that has A only record (and
no AAAA) even if hits.ai_family was set to AF_INET6.

glibc 2.14 (invalid behaviour):

$ ./a.out
succeeded - BAD!
Got 209.132.183.81 port 0 family 2
Got 209.132.183.81 port 0 family 2
Got 209.132.183.81 port 0 family 2

glibc 2.13 (correct behaviour):
$ ./a.out
failed - OK!: Name or service not known

Test programs resolves redhat.com which at this moment has no AAAA record.

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[pluto at agmk dot net]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

Pawel Sikora <pluto at agmk dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pluto at agmk dot net

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[schwab@linux-m68k.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mbabinski at google dot com

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> 2011-06-15 15:51:34 UTC ---
This is broken by bug 12714.

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

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

--- Comment #2 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-06-21 21:05:58 UTC ---
I think the patch I applied fixes the problem.

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[cryptooctoploid at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

Octoploid <cryptooctoploid at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |cryptooctoploid at gmail
                   |                            |dot com
         Resolution|FIXED                       |

--- Comment #3 from Octoploid <cryptooctoploid at gmail dot com> 2011-06-22 14:00:58 UTC ---
> I think the patch I applied fixes the problem.

It may fix the IPv6 problem, but unfortunately it breaks the IPv4 case.

% git pull
fatal: Unable to look up sourceware.org (port 9418) (No address associated with
hostname)
([Errno -5] No address associated with hostname))

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[cryptooctoploid at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12885

Octoploid <cryptooctoploid at gmail dot com> changed:

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

--- Comment #4 from Octoploid <cryptooctoploid at gmail dot com> 2011-06-23 10:16:10 UTC ---
Fixed by Andreas' commit.

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[Bug libc/12885] getaddrinfo with hints.ai_family=AF_INET6 succeeds even if resolving entry with no AAAA record

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12885

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com
              Flags|                            |security-

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