netdev - Re: TAHI testing fails for IPv6 Fragments in Kernel 4.9

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Message-ID: <CAB=W+o=-30-FPcLR-_vpdJaKFiTObNUwsCfPErhjVoq7i9Unxg@mail.gmail.com>
Date:   Mon, 11 Mar 2019 22:12:25 -0600
From:   Captain Wiggum <captwiggum@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        Florian Westphal <fw@...len.de>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: TAHI testing fails for IPv6 Fragments in Kernel 4.9

Hi All,

To summarize this thread, we test for IPv6 Ready Logo using Self-test
Tools (TAHI Project) here:
https://www.ipv6ready.org/?page=documents&tag=ipv6-core-protocols

4.9.133 and previous passed 100%. Beginning with 4.9.134 it fails 18
tests related to IPv6 fragment headers.
I have done a git bisect, built and tested 7 revisions between 4.9.133
- 4.9.134, this is the final bisect result:
------
$ git bisect bad
a8444b1ccb20339774af58e40ad42296074fb484 is the first bad commit
commit a8444b1ccb20339774af58e40ad42296074fb484
Author: Florian Westphal <fw@...len.de>
Date:   Wed Oct 10 12:30:10 2018 -0700
ipv6: defrag: drop non-last frags smaller than min mtu
------
Also I believe it fails in all kernels since then, 4.19, stable, etc.
Would it be possible for someone to look at that?
Any tips appreciated.

--John Masinter