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

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Message-ID: <2723870.nq54KKjWkm@h2o.as.studentenwerk.mhn.de>
Date:	Thu, 07 May 2015 00:04:39 +0200
From:	Wolfgang Walter <linux@...m.de>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	Vlad Yasevich <vyasevich@...il.com>,
	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

Am Mittwoch, 6. Mai 2015, 12:10:00 schrieb Eric Dumazet:
> 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")

Indeed, that fixes the problem.

Regards
-- 
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
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