ping6 to own link-local address

ping6 to own link-local address

[YOSHIFUJI Hideaki / 吉藤英明]

Hello.

Recent 2.6.21-git kernels do not respond to ping6 queries
to our own (local) link-local address.  Now bisecting...

--yoshfuji

Re: ping6 to own link-local address

[Sridhar Samudrala]

On Tue, 2007-03-20 at 10:19 +0100, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> Hello.
> 
> Recent 2.6.21-git kernels do not respond to ping6 queries
> to our own (local) link-local address.  Now bisecting...

The following patch seems to be the cause for this regression.

[IPV6] ROUTE: Do not route packets to link-local address on other device.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a0d78ebf3a0e33a1aeacf2fc518ad9273d6a1c2f

Thanks
Sridhar

Re: ping6 to own link-local address

[YOSHIFUJI Hideaki / 吉藤英明]

In article <1174429000.3255.3.camel@w-sridhar2.beaverton.ibm.com> (at Tue, 20 Mar 2007 15:16:40 -0700), Sridhar Samudrala <sri@us.ibm.com> says:

> On Tue, 2007-03-20 at 10:19 +0100, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> > Hello.
> > 
> > Recent 2.6.21-git kernels do not respond to ping6 queries
> > to our own (local) link-local address.  Now bisecting...
> 
> The following patch seems to be the cause for this regression.
> 
> [IPV6] ROUTE: Do not route packets to link-local address on other device.
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a0d78ebf3a0e33a1aeacf2fc518ad9273d6a1c2f

Right.  Hmm...

--yoshfuji

Re: ping6 to own link-local address

[YOSHIFUJI Hideaki / 吉藤英明]

In article <20070321.002609.58216683.yoshfuji@linux-ipv6.org> (at Wed, 21 Mar 2007 00:26:09 +0100 (CET)), YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> says:

> In article <1174429000.3255.3.camel@w-sridhar2.beaverton.ibm.com> (at Tue, 20 Mar 2007 15:16:40 -0700), Sridhar Samudrala <sri@us.ibm.com> says:
> 
> > On Tue, 2007-03-20 at 10:19 +0100, YOSHIFUJI Hideaki / 吉藤英明 wrote:
> > > Hello.
> > > 
> > > Recent 2.6.21-git kernels do not respond to ping6 queries
> > > to our own (local) link-local address.  Now bisecting...
> > 
> > The following patch seems to be the cause for this regression.
> > 
> > [IPV6] ROUTE: Do not route packets to link-local address on other device.
> > 
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a0d78ebf3a0e33a1aeacf2fc518ad9273d6a1c2f
> 
> Right.  Hmm...

Well, 2.6.21 is coming.  I think it is better to revert it for now.
Current situation is more critical than the original.

Dave?

--yoshfuji

Re: ping6 to own link-local address

[David Miller]

From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Date: Wed, 28 Mar 2007 16:57:48 +0900 (JST)

> In article <20070321.002609.58216683.yoshfuji@linux-ipv6.org> (at Wed, 21 Mar 2007 00:26:09 +0100 (CET)), YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> says:
> 
> > In article <1174429000.3255.3.camel@w-sridhar2.beaverton.ibm.com> (at Tue, 20 Mar 2007 15:16:40 -0700), Sridhar Samudrala <sri@us.ibm.com> says:
> > 
> > > The following patch seems to be the cause for this regression.
> > > 
> > > [IPV6] ROUTE: Do not route packets to link-local address on other device.
> > > 
> > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a0d78ebf3a0e33a1aeacf2fc518ad9273d6a1c2f
> > 
> > Right.  Hmm...
> 
> Well, 2.6.21 is coming.  I think it is better to revert it for now.
> Current situation is more critical than the original.
> 
> Dave?

I will look into this and make some kind of decision on how
to proceed tomorrow.

Re: ping6 to own link-local address

[YOSHIFUJI Hideaki / 吉藤英明]

Hello.

In article <20070328.014533.112621902.davem@davemloft.net> (at Wed, 28 Mar 2007 01:45:33 -0700 (PDT)), David Miller <davem@davemloft.net> says:

> > > > [IPV6] ROUTE: Do not route packets to link-local address on other device.
> > > > 
> > > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a0d78ebf3a0e33a1aeacf2fc518ad9273d6a1c2f
> > > 
> > > Right.  Hmm...
> > 
> > Well, 2.6.21 is coming.  I think it is better to revert it for now.
> > Current situation is more critical than the original.
> > 
> > Dave?
> 
> I will look into this and make some kind of decision on how
> to proceed tomorrow.

Dave?

I do think this is a regression in 2.6.21-rcs, and it is much
better to revert it.

Thank you.

--yoshfuji

Re: ping6 to own link-local address

[David Miller]

From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Date: Fri, 06 Apr 2007 16:35:31 +0900 (JST)

> Dave?
> 
> I do think this is a regression in 2.6.21-rcs, and it is much
> better to revert it.

My apologies, I promise I will look into this tomorrow.

Re: ping6 to own link-local address

[David Miller]

From: David Miller <davem@davemloft.net>
Date: Fri, 06 Apr 2007 01:02:48 -0700 (PDT)

> From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
> Date: Fri, 06 Apr 2007 16:35:31 +0900 (JST)
> 
> > Dave?
> > 
> > I do think this is a regression in 2.6.21-rcs, and it is much
> > better to revert it.
> 
> My apologies, I promise I will look into this tomorrow.

Ok, I will revert this change, it does seem to be the best way to fix
this for now as I cannot figure out how to quickly fix this bug.