From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gilad Ben-Yossef Subject: Re: 2.6.32-rc5-mmotm1101 - kernel BUG at net/ipv4/tcp_input.c:3707! Date: Wed, 04 Nov 2009 08:38:01 +0200 Message-ID: <4AF12149.1060305@codefidence.com> References: <5765.1257270611@turing-police.cc.vt.edu> <4AF07024.80103@gmail.com> <4AF08292.7090102@codefidence.com> <7916.1257300093@turing-police.cc.vt.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: =?windows-1252?Q?Ilpo_J=E4rvinen?= , Eric Dumazet , Andrew Morton , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Ori Finkelman To: Valdis.Kletnieks@vt.edu Return-path: In-Reply-To: <7916.1257300093@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Valdis.Kletnieks@vt.edu wrote: > On Tue, 03 Nov 2009 23:34:19 +0200, Ilpo J=C3=E2=82=ACrvinen said: > > =20 >> On Tue, 3 Nov 2009, Gilad Ben-Yossef wrote: >> >> =20 >>> Eric Dumazet wrote: >>> >>> =20 >>>> Valdis.Kletnieks@vt.edu a =E9crit : >>>> =20 >>>> =20 >>>>> Seen right after I started 'fetchmail'. Reproducible - 3 out of = 3. >>>>> I'll bisect this tonight if nobody jumps up and yells they know w= hat it >>>>> is... >>>>> =20 >>>>> =20 >>> Bah... this is most probably my fault. Sorry about that. >>> >>> Can you please try the patch in the next email? >>> =20 > > Tried while at home, machine panic'ed. No netconsole here at the mom= ent, sorry. > =20 Ok, thanks.That is ... strange. I didn't manage to recreate this here with a simple IPv6 set and netcat as server client but I will try further, but if there is any way to sen= d me the crash location that would be a big help. Thanks. > =20 > > Why was this blowing chunks in the IPv6 when I was making an IPv4 con= nection > then? I just noticed that. My fetchmail can't make an IPv6 TCP connec= tion to > our IMAP server because the server isn't v6-enabled yet. And althoug= h I > contact our DNS over IPv6, but that's UDP not TCP. > > =20 I don't think the chunk blowing occurred due to the connection to the I= MAP server. That codes deals with incoming SYNs. I guess it happened when=20 fetchmail tried to connect to the local mail daemon and this should be happening=20 over the loopback interface... Gilad --=20 Gilad Ben-Yossef Chief Coffee Drinker & CTO Codefidence Ltd. Web: http://codefidence.com Cell: +972-52-8260388 Skype: gilad_codefidence Tel: +972-8-9316883 ext. 201 =46ax: +972-8-9316884 Email: gilad@codefidence.com Check out our Open Source technology and training blog - http://tuxolog= y.net "The biggest risk you can take it is to take no risk." -- Mark Zuckerberg and probably others