Date: Tue, 12 Feb 2008 16:50:03 GMT From: Bryan Drewery <bryan@xzibition.com> To: freebsd-net@FreeBSD.org Subject: Re: kern/116172: [tun] [panic] Network / ipv6 recursive mutex panic Message-ID: <200802121650.m1CGo3no055437@freefall.freebsd.org>
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The following reply was made to PR kern/116172; it has been noted by GNATS.
From: Bryan Drewery <bryan@xzibition.com>
To: bug-followup@FreeBSD.org, peter@wemm.org
Cc:
Subject: Re: kern/116172: [tun] [panic] Network / ipv6 recursive mutex panic
Date: Tue, 12 Feb 2008 09:38:29 -0600
Hi,
I've been getting this (what I believe to be) same panic on my FreeBSD
6.2-p9 machines.
The key difference is that I am NOT using a tunnel. This is *native* ipv6.
Not enabling IPV6 at boot solves the problem for me, but is not a real
solution.
(kgdb) bt
#0 doadump () at pcpu.h:165
#1 0xc056b85e in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc056bb68 in panic (fmt=0xc07501cf "%s") at
/usr/src/sys/kern/kern_shutdown.c:565
#3 0xc072406d in trap_fatal (frame=0xe70c9838, eva=0) at
/usr/src/sys/i386/i386/trap.c:837
#4 0xc0723785 in trap (frame=
{tf_fs = -1067122680, tf_es = -418643928, tf_ds = 40, tf_edi =
-995259392, tf_esi = -947956992, tf_ebp = -418604932, tf_isp =
-418604956, tf_ebx = -928072192, tf_edx = -947956992, tf_ecx = 4, tf_eax
= 4, tf_trapno = 12, tf_err = 0, tf_eip = -1067904549, tf_cs = 32,
tf_eflags = 65539, tf_esp = -947956992, tf_ss = -418604896}) at
/usr/src/sys/i386/i386/trap.c:270
#5 0xc0710b0a in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#6 0xc05911db in turnstile_setowner (ts=0xc8aebe00, owner=0x4) at
/usr/src/sys/kern/subr_turnstile.c:432
#7 0xc0591507 in turnstile_wait (lock=0xc4e93ed0, owner=0x4) at
/usr/src/sys/kern/subr_turnstile.c:591
#8 0xc0560167 in _mtx_lock_sleep (m=0xc4e93ed0, tid=3347010304, opts=0,
file=0x0, line=0) at /usr/src/sys/kern/kern_mutex.c:579
#9 0xc0650912 in nd6_output (ifp=0xc4ad8c00, origifp=0x4,
m0=0xc923c600, dst=0xc4d0c9dc, rt0=0xc4e9f000)
at /usr/src/sys/netinet6/nd6.c:2004
#10 0xc0649c58 in ip6_output (m0=0xe70c9a78, opt=0x0, ro=0xe70c9a78,
flags=0, im6o=0x0, ifpp=0x0, inp=0xc970a0b4)
at /usr/src/sys/netinet6/ip6_output.c:994
#11 0xc06267e4 in tcp_output (tp=0xc92d13a0) at
/usr/src/sys/netinet/tcp_output.c:1059
#12 0xc062ed52 in tcp_usr_send (so=0xc93c36f4, flags=0, m=0xc950b700,
nam=0x0, control=0x0, td=0xc77f5300)
at /usr/src/sys/netinet/tcp_usrreq.c:698
#13 0xc05ad988 in sosend (so=0xc93c36f4, addr=0x0, uio=0xe70c9cb0,
top=0xc950b700, control=0x0, flags=0, td=0xc77f5300)
at /usr/src/sys/kern/uipc_socket.c:836
#14 0xc05998c8 in soo_write (fp=0x4, uio=0xe70c9cb0,
active_cred=0xc8a77180, flags=0, td=0xc77f5300) at
/usr/src/sys/kern/sys_socket.c:118
#15 0xc0592ff0 in dofilewrite (td=0xc77f5300, fd=4, fp=0xc90d6288,
auio=0xe70c9cb0, offset=Unhandled dwarf expression opcode 0x93
) at file.h:252
#16 0xc0592e27 in kern_writev (td=0xc77f5300, fd=21, auio=0x4) at
/usr/src/sys/kern/sys_generic.c:402
#17 0xc0592cf9 in write (td=0x4, uap=0x4) at
/usr/src/sys/kern/sys_generic.c:326
#18 0xc0724423 in syscall (frame=
{tf_fs = -1078001605, tf_es = -1078001605, tf_ds = -1078001605,
tf_edi = 137218624, tf_esi = 137218624, tf_ebp = 154, tf_isp =
-418603676, tf_ebx = 270840404, tf_edx = 137166848, tf_ecx = 272127008,
tf_eax = 4, tf_trapno = 22, tf_err = 2, tf_eip = 272063395, tf_cs = 51,
tf_eflags = 530, tf_esp = -1077942612, tf_ss = 59}) at
/usr/src/sys/i386/i386/trap.c:983
#19 0xc0710b5f in Xint0x80_syscall () at
/usr/src/sys/i386/i386/exception.s:200
#20 0x00000033 in ?? ()
I actually did not use rc.conf to setup my ipv6 either, here is my
script for activating the v6 on boot:
ifconfig em0 inet6 2610:88:1::3:2 prefixlen 112
ifconfig em0 inet6 2610:88:1::3:3 prefixlen 112
route add -inet6 default 2610:88:1::3:0
What's odd is that these panics only began when my datacenter had a fire
in their 'router cage', and replaced the router. I'm not sure how this
is related, if at all, but the panics definitely only began on that
date, on two separate machines.
Bryan Drewery
Administrator
Xzibition Data Communications
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