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Date:   Mon, 11 Mar 2019 22:12:25 -0600
From:   Captain Wiggum <>
To:     Eric Dumazet <>,
        Florian Westphal <>
Cc:     David Miller <>,
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:

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 <>
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

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