On Fri, 2013-04-05 at 17:48 +0200, Tetja Rediske wrote: > Hi, > CC netdev and Duan Jiong (author of bad commit)
> [1.] One line summary of the problem: > > IPv6 TCP-Connections resetting > > [2.] Full description of the problem/report: > > In the last weeks we updated some of our systems to a 3.8.4 Kernel. > Since then sometimes we can't connect to services running IPv6, > Apache and Openssh tested. > > We got this on different machines with x86 and x86_64 Kernels. On > x86_64 it is more random, but on x86 i can reproduce it permanently > (Just opening any TCP Connection 1st time or after some short delay). > Connecting quick after the reset again will work as expected. It will > also work, if you keep another connection open. > > Before I got to the Kernel, I just kept an strace on an userspace > process, but it did not notice the connection attempt. After this I > monitored the connection with tcpdump, but nothing unusual. > > Then I did a rollback to the older Kernel and it worked as expected. > > I tracked it down with 'git bisect' to commit: > > 093d04d42fa094f6740bb188f0ad0c215ff61e2c > > I also tested latest git state available. > > [3.] Keywords (i.e., modules, networking, kernel): > > networking, IPv6 > > [4.] Kernel information > [4.1.] Kernel version (from /proc/version): > > since commit: 093d04d42fa094f6740bb188f0ad0c215ff61e2c > > [4.2.] Kernel .config file: > [5.] Most recent kernel version which did not have the bug: > > none > > [6.] Output of Oops.. message (if applicable) with symbolic information > resolved (see Documentation/oops-tracing.txt) > [7.] A small shell script or example program which triggers the > problem (if possible) > [8.] Environment > [8.1.] Software (add the output of the ver_linux script here) > > Different systems, mostly reproduced on this one: > > Linux dns03.tetja.de 3.9.0-rc5+ #10 SMP Fri Apr 5 16:55:54 CEST 2013 > i686 AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ AuthenticAMD > GNU/Linux > > Gnu C 4.4.5 > Gnu make 3.82 > binutils 2.22 > util-linux 2.22.2 > mount debug > module-init-tools 12 > e2fsprogs 1.42 > jfsutils 1.1.15 > reiserfsprogs 3.6.21 > xfsprogs 3.1.10 > Linux C Library 2.15 > Dynamic linker (ldd) 2.15 > Procps 3.3.4 > Net-tools 1.60_p20120127084908 > Kbd 1.15.3wip > Sh-utils 8.20 > Modules Loaded > > Connections looking like this on booth sites: > > 11:52:04.634315 IP6 2a00:1828:0:1::10.51808 > > 2a00:1828:1000:1102::2.80: Flags [S], seq 103067898, win 5760, options > [mss 1440,sackOK,TS val 232579708 ecr 0,nop,wscale 7], length 0 > > 11:52:04.634354 IP6 2a00:1828:1000:1102::2.80 > > 2a00:1828:0:1::10.51808: Flags [S.], seq 3352491415, ack 103067899, win > 14280, options [mss 1440,sackOK,TS val 174797959 ecr > 232579708,nop,wscale 7], length 0 > > 11:52:04.634656 IP6 fe80::92e2:baff:fe00:c120 > 2a00:1828:1000:1102::2: > ICMP6, redirect, 2a00:1828:0:1::10 to 2a00:1828:0:1::10, length 136 > > 11:52:04.634715 IP6 2a00:1828:0:1::10.51808 > > 2a00:1828:1000:1102::2.80: Flags [.], ack 1, win 45, options > [nop,nop,TS val 232579708 ecr 174797959], length 0 > > 11:52:04.634726 IP6 2a00:1828:1000:1102::2.80 > > 2a00:1828:0:1::10.51808: Flags [R], seq 3352491416, win 0, length 0 > > 11:52:04.635027 IP6 2a00:1828:0:1::10.51808 > > 2a00:1828:1000:1102::2.80: Flags [P.], seq 1:359, ack 1, win 45, > options [nop,nop,TS val 232579708 ecr 174797959], length 358 > > 11:52:04.635037 IP6 2a00:1828:1000:1102::2.80 > > 2a00:1828:0:1::10.51808: Flags [R], seq 3352491416, win 0, length 0 > > 11:52:04.635071 IP6 fe80::92e2:baff:fe00:c120 > 2a00:1828:1000:1102::2: > ICMP6, redirect, 2a00:1828:0:1::10 to 2a00:1828:0:1::10, length 112 > > 11:52:04.635246 IP6 fe80::92e2:baff:fe00:c120 > 2a00:1828:1000:1102::2: > ICMP6, redirect, 2a00:1828:0:1::10 to 2a00:1828:0:1::10, length 112 > > Kind Regards and keep up the good work! :) > > Tetja Rediske -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
