Re: "ro->_ro_rt ==NULL || ro->_ro_rt->rt_refcnt > 0" failed

[Jun Ebihara <jun%soum.co.jp@localhost>]

From: Ryota Ozaki <ozaki-r%netbsd.org@localhost>
Subject: Re: "ro->_ro_rt ==NULL || ro->_ro_rt->rt_refcnt > 0" failed
Date: Fri, 28 Aug 2015 11:53:17 +0900

> Can you provide backtrace? I want to know where it happened.

(gdb) target kvm netbsd.70.core
0xc072cda6 in cpu_reboot ()
(gdb) bt
#0  0xc072cda6 in cpu_reboot ()
#1  0xc09941b0 in vpanic ()
#2  0xc0b56d7b in kern_assert ()
#3  0xc0ddbda8 in ?? ()
#4  0xc0b5eca9 in rtcache_invariants.part.2 ()
#5  0xc08c8255 in rtcache_clear ()
#6  0xc08c82ca in rtcache_free ()
#7  0xc05824fc in in6_pcbdetach ()
#8  0xc09d9b58 in tcp_close ()
#9  0xc09db9d1 in tcp_timer_2msl ()
#10 0xc06c5474 in callout_softclock ()
#11 0xc06b9b46 in softint_dispatch ()
#12 0xc0100fdb in Xsoftintr ()
#13 0xc352fd20 in end ()
#14 0x00000002 in _KERNEL_OPT_WSEMUL_VT100 ()
#15 0xffffffff in _KERNEL_OPT_PMS_DISABLE_POWERHOOK ()
#16 0xffffffff in _KERNEL_OPT_PMS_DISABLE_POWERHOOK ()
#17 0xffffffff in _KERNEL_OPT_PMS_DISABLE_POWERHOOK ()
#18 0xffffffff in _KERNEL_OPT_PMS_DISABLE_POWERHOOK ()
#19 0xdaed0ff0 in end ()
#20 0xdaed0f88 in end ()
#21 0xc352f2a0 in end ()
---Type <return> to continue, or q <return> to quit--- 
#22 0x80050033 in _KERNEL_OPT_ZYD_DEBUG ()
#23 0x00000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)


> On Fri, Aug 28, 2015 at 11:44 AM, Jun Ebihara <jun%soum.co.jp@localhost> wrote:
>> On: i386 kernel from nyftp.
>> 7.99.21 NetBSD 7.99.21 (GENERIC.201508271450Z) #0: Thu Aug 27 17:23:37 UTC 2015  builds%b47.netbsd.org@localhost:/home/builds/ab/HEAD/i386/201508271450Z-obj/home/source/ab/HEAD/src/sys/arch/i386/compile/GENERIC i386
>>
>> sometimes panic around route.h.
>>
>> savecore: reboot after panic: panic: kernel diagnostic assertion "ro->_ro_rt ==NULL || ro->_ro_rt->rt_refcnt > 0" failed: file "/home/source/ab/HEAD/src/sys/net/route.h", line 433
>>
>> --
>> Jun Ebihara
>>
>>