linux-kernel - Re: kernel >= 4.0: crashes when using traceroute6 with isatap

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Message-ID: <1430939400.14545.65.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 06 May 2015 12:10:00 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <xiyou.wangcong@...il.com>,
	Vlad Yasevich <vyasevich@...il.com>
Cc:	Wolfgang Walter <linux@...m.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: kernel >= 4.0: crashes when using traceroute6 with isatap

On Wed, 2015-05-06 at 11:15 -0700, Cong Wang wrote:
> (Cc'ing netdev.)
> 
> On Sat, May 2, 2015 at 5:29 AM, Wolfgang Walter <linux@...m.de> wrote:
> > Am Samstag, 2. Mai 2015, 02:16:36 schrieb Wolfgang Walter:
> >> Hello,
> >>
> >> kernel 4.0 (and 4.0.1) crashes immediately when I use traceroute6 with an
> >> isatap-tunnel.
> >
> > I did some further tests. To trigger the crash you need
> >
> > * isatap-tunnel (probably any sit-tunnel will do it)
> > * raw-socket
> > * udp
> >
> > Using icmpv6 or tcp i.e. does not trigger it.
> >
> 
> Do you have a script to reproduce it?
> 
> 
> Thanks for the bug report!
> --

Please Wolfgang try to revert 32dce968dd987adfb0c00946d78dad9154f64759
("ipv6: Allow for partial checksums on non-ufo packets")


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