Debian Bug report logs - #405694
inet6 option in /etc/resolv.conf causes problems for a lot of programs

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Jeroen Massar <jeroen@unfix.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Fri, 05 Jan 2007 17:44:23 +0100

Package: libc6
Version: 2.3.6.ds1-9
Severity: important

Adding 'options inet6' in /etc/resolv.conf will cause many programs to
crash or misbehave. The documentation currently contains (reformated):

 inet6  sets RES_USE_INET6 in  _res.options. This has the effect
        of trying a AAAA query before an A query inside the
        gethostbyname() function, and of mapping IPv4 responses
        in IPv6 ``tunnelled form'' if no AAAA records are found
        but an A record set exists.

A *big* warning should be given that setting this flag will cause
programs to behave strangely, as they will get back an AAAA record
and not the expected A record


Additionally one could consider to remove this feature as 'tunneled
forms', with which most likely ::a.b.c.d or ::ffff:a.b.c.d are meant
are deprecated by the IETF as they only cause issues, for instance
like these.

For instance a 2.6.x kernel will report the following when
doing a IPv4 traceroute (pkg: traceroute-nanog 6.3.10-2):

"traceroute forgot to set AF_INET in raw sendmsg. Fix it!"

Also SpamAssassin (3.1.7-1) will segfault when this option is used.

Separate bugs will be failed against these packages, referencing
this bug.

Greets,
 Jeroen

-- System Information:
Debian Release: 4.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages libc6 depends on:
ii  tzdata                        2006p-1    Time Zone and Daylight Saving Time

libc6 recommends no packages.

-- no debconf information

Message #10 received at 405694@bugs.debian.org (full text, mbox, reply):

From: Aurelien Jarno <aurelien@aurel32.net>

To: Jeroen Massar <jeroen@unfix.org>, 405694@bugs.debian.org, control@bugs.debian.org

Subject: Re: Bug#405694: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Mon, 08 Jan 2007 22:20:05 +0100

severity 405694 minor
reassign 405694 manpages
thanks

Jeroen Massar a écrit :
> Package: libc6
> Version: 2.3.6.ds1-9
> Severity: important
> 
> Adding 'options inet6' in /etc/resolv.conf will cause many programs to
> crash or misbehave. The documentation currently contains (reformated):
> 
>  inet6  sets RES_USE_INET6 in  _res.options. This has the effect
>         of trying a AAAA query before an A query inside the
>         gethostbyname() function, and of mapping IPv4 responses
>         in IPv6 ``tunnelled form'' if no AAAA records are found
>         but an A record set exists.
> 
> A *big* warning should be given that setting this flag will cause
> programs to behave strangely, as they will get back an AAAA record
> and not the expected A record
> 
> 
> Additionally one could consider to remove this feature as 'tunneled
> forms', with which most likely ::a.b.c.d or ::ffff:a.b.c.d are meant
> are deprecated by the IETF as they only cause issues, for instance
> like these.
> 
> For instance a 2.6.x kernel will report the following when
> doing a IPv4 traceroute (pkg: traceroute-nanog 6.3.10-2):
> 
> "traceroute forgot to set AF_INET in raw sendmsg. Fix it!"
> 
> Also SpamAssassin (3.1.7-1) will segfault when this option is used.
> 
> Separate bugs will be failed against these packages, referencing
> this bug.

The option behaves exactly as described. There is no bug there, except
maybe a lack of documentation. Downgrading the severity to minor and
reassigning this bug to the package manpages, with provide this manpage.
I guess a warning should be added.

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

Message #19 received at 405694@bugs.debian.org (full text, mbox, reply):

From: Jeroen Massar <jeroen@unfix.org>

To: Aurelien Jarno <aurelien@aurel32.net>

Cc: 405694@bugs.debian.org, control@bugs.debian.org

Subject: Re: Bug#405694: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Tue, 09 Jan 2007 11:33:27 +0000

[Message part 1 (text/plain, inline)]

Aurelien Jarno wrote:

> The option behaves exactly as described. There is no bug there, except
> maybe a lack of documentation. Downgrading the severity to minor and
> reassigning this bug to the package manpages, with provide this manpage.
> I guess a warning should be added.

I agree with this.

Though *all* the packages that use this functionality have to be checked
as they will segfault, as shown with the traceroute-nanog package.

I've filed separate bugs to those packages already.

Greets,
 Jeroen

[signature.asc (application/pgp-signature, attachment)]

Message #24 received at 405694@bugs.debian.org (full text, mbox, reply):

From: Martin Schulze <joey@infodrom.org>

To: Aurelien Jarno <aurelien@aurel32.net>, 405694@bugs.debian.org

Cc: Jeroen Massar <jeroen@unfix.org>

Subject: Re: Bug#405694: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Wed, 30 Jan 2008 19:27:17 +0100

Aurelien Jarno wrote:
> > Adding 'options inet6' in /etc/resolv.conf will cause many programs to
> > crash or misbehave. The documentation currently contains (reformated):
> > 
> >  inet6  sets RES_USE_INET6 in  _res.options. This has the effect
> >         of trying a AAAA query before an A query inside the
> >         gethostbyname() function, and of mapping IPv4 responses
> >         in IPv6 ``tunnelled form'' if no AAAA records are found
> >         but an A record set exists.
> > 
> > A *big* warning should be given that setting this flag will cause
> > programs to behave strangely, as they will get back an AAAA record
> > and not the expected A record
> > 
> > 
> > Additionally one could consider to remove this feature as 'tunneled
> > forms', with which most likely ::a.b.c.d or ::ffff:a.b.c.d are meant
> > are deprecated by the IETF as they only cause issues, for instance
> > like these.
> > 
> > For instance a 2.6.x kernel will report the following when
> > doing a IPv4 traceroute (pkg: traceroute-nanog 6.3.10-2):
> > 
> > "traceroute forgot to set AF_INET in raw sendmsg. Fix it!"
> > 
> > Also SpamAssassin (3.1.7-1) will segfault when this option is used.
> > 
> > Separate bugs will be failed against these packages, referencing
> > this bug.
> 
> The option behaves exactly as described. There is no bug there, except
> maybe a lack of documentation. Downgrading the severity to minor and
> reassigning this bug to the package manpages, with provide this manpage.
> I guess a warning should be added.

Will add:

Index: man5/resolv.conf.5
===================================================================
RCS file: /var/cvs/debian/manpages/man5/resolv.conf.5,v
retrieving revision 1.22
diff -u -p -r1.22 resolv.conf.5
--- man5/resolv.conf.5	30 Jan 2008 17:44:56 -0000	1.22
+++ man5/resolv.conf.5	30 Jan 2008 18:25:32 -0000
@@ -189,6 +189,8 @@ This has the effect of trying a AAAA que
 .BR gethostbyname (3)
 function, and of mapping IPv4 responses in IPv6 "tunneled form"
 if no AAAA records are found but an A record set exists.
+
+Some programs behave strange when this option is turned on.
 .RE
 .LP
 The \fIdomain\fP and \fIsearch\fP keywords are mutually exclusive.

Regards,

	Joey

-- 
Life is too short to run proprietary software.  -- Bdale Garbee

Please always Cc to me when replying to me on the lists.

Message #29 received at 405694@bugs.debian.org (full text, mbox, reply):

From: Justin Pryzby <justinpryzby@users.sourceforge.net>

To: Martin Schulze <joey@infodrom.org>, 405694@bugs.debian.org

Subject: Re: Bug#405694: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Wed, 30 Jan 2008 16:32:30 -0500

On Wed, Jan 30, 2008 at 07:27:17PM +0100, Martin Schulze wrote:

> --- man5/resolv.conf.5	30 Jan 2008 17:44:56 -0000	1.22
> +++ man5/resolv.conf.5	30 Jan 2008 18:25:32 -0000
> @@ -189,6 +189,8 @@ This has the effect of trying a AAAA que
>  .BR gethostbyname (3)
>  function, and of mapping IPv4 responses in IPv6 "tunneled form"
>  if no AAAA records are found but an A record set exists.
> +
> +Some programs behave strange when this option is turned on.
>  .RE
>  .LP
>  The \fIdomain\fP and \fIsearch\fP keywords are mutually exclusive.
That should be: "strangely".

Justin

Message #34 received at 405694-close@bugs.debian.org (full text, mbox, reply):

From: Martin Schulze <joey@infodrom.org>

To: 405694-close@bugs.debian.org

Subject: Bug#405694: fixed in manpages 2.76-1

Date: Wed, 30 Jan 2008 21:47:02 +0000

Source: manpages
Source-Version: 2.76-1

We believe that the bug you reported is fixed in the latest version of
manpages, which is due to be installed in the Debian FTP archive:

manpages-dev_2.76-1_all.deb
  to pool/main/m/manpages/manpages-dev_2.76-1_all.deb
manpages_2.76-1.diff.gz
  to pool/main/m/manpages/manpages_2.76-1.diff.gz
manpages_2.76-1.dsc
  to pool/main/m/manpages/manpages_2.76-1.dsc
manpages_2.76-1_all.deb
  to pool/main/m/manpages/manpages_2.76-1_all.deb
manpages_2.76.orig.tar.gz
  to pool/main/m/manpages/manpages_2.76.orig.tar.gz



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 405694@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Martin Schulze <joey@infodrom.org> (supplier of updated manpages package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Wed, 30 Jan 2008 22:20:57 +0100
Source: manpages
Binary: manpages manpages-dev
Architecture: source all
Version: 2.76-1
Distribution: unstable
Urgency: low
Maintainer: Martin Schulze <joey@debian.org>
Changed-By: Martin Schulze <joey@infodrom.org>
Description: 
 manpages   - Manual pages about using a GNU/Linux system
 manpages-dev - Manual pages about using GNU/Linux for development
Closes: 149554 236671 333871 348072 405694 435018 454007 459232 462636 462969
Changes: 
 manpages (2.76-1) unstable; urgency=low
 .
   * New upstream version
     . Add 2.6 details for /proc/sys/kernel/random/poolsize to random(4)
       (closes: Bug#459232)
   * Convert changelog and copyright from latin1 to utf8 (closes: Bug#454007)
   * Added override for lintian false positives
   * Properly quote ... and 'at the beginning of a line in stdarg(3) and
     bootparam(7) (closes: Bug#462636)
   * Adjusted proc(5) to not claim using bytes anymore (closes: Bug#462969)
   * Improved examples in bsearch(3) and qsort(3), thanks to Falk Hüffner
     (closes: Bug#348072)
   * Document overriding of certain passwd fields in nsswitch.conf(5),
     thanks to Vincent McIntyre (closes: Bug#333871)
   * Don't claim running a nameserver on localhost is normal in
     resolv.conf(5) (closes: Bug#149554)
   * Adjusted the reporting address in ioctl_list(2) (closes: Bug#236671)
   * Added a note on inet6 in resolv.conf(5) (closes: Bug#405694)
   * Fixed typo in vfork(2) (closes: Bug#435018)
Files: 
 536f3494b54940ddb2d47abc1cc89215 584 doc important manpages_2.76-1.dsc
 7e330eca6fb97c261b30b36684e54101 1277680 doc important manpages_2.76.orig.tar.gz
 ec52822323d50e91572168079a30d684 48149 doc important manpages_2.76-1.diff.gz
 3abfb14f19dd2e0f0774f0c72df2d701 549796 doc important manpages_2.76-1_all.deb
 6f4eacab0716b1b0a82200fb7d158f83 1362732 doc optional manpages-dev_2.76-1_all.deb

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Message #39 received at 405694@bugs.debian.org (full text, mbox, reply):

From: Martin Schulze <joey@infodrom.org>

To: Justin Pryzby <justinpryzby@users.sourceforge.net>

Cc: 405694@bugs.debian.org

Subject: Re: Bug#405694: inet6 option in /etc/resolv.conf causes problems for a lot of programs

Date: Thu, 31 Jan 2008 09:00:16 +0100

Justin Pryzby wrote:
> On Wed, Jan 30, 2008 at 07:27:17PM +0100, Martin Schulze wrote:
> 
> > --- man5/resolv.conf.5	30 Jan 2008 17:44:56 -0000	1.22
> > +++ man5/resolv.conf.5	30 Jan 2008 18:25:32 -0000
> > @@ -189,6 +189,8 @@ This has the effect of trying a AAAA que
> >  .BR gethostbyname (3)
> >  function, and of mapping IPv4 responses in IPv6 "tunneled form"
> >  if no AAAA records are found but an A record set exists.
> > +
> > +Some programs behave strange when this option is turned on.
> >  .RE
> >  .LP
> >  The \fIdomain\fP and \fIsearch\fP keywords are mutually exclusive.
> That should be: "strangely".

Apparently yes, sorry.

Regards,

	Joey

-- 
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