Apparent IPv6 bug

Li, Qing qing.li at bluecoat.com
Tue Feb 23 22:46:11 UTC 2010


Okay, I read through your core file and I think I see the problem now. 
Let me try to get you a patch later tonight.

-- Qing


-----Original Message-----
From: owner-freebsd-net at freebsd.org on behalf of Doug Barton
Sent: Tue 2/23/2010 12:38 PM
To: freebsd-net at freebsd.org
Subject: Apparent IPv6 bug
 
Howdy,

I've had the following crash twice now when leaving my system up overnight:

(kgdb) #0  doadump () at pcpu.h:246
#1  0xc05f64af in boot (howto=260)
    at /usr/local/src/sys/kern/kern_shutdown.c:416
#2  0xc05f6792 in panic (fmt=Variable "fmt" is not available.
) at /usr/local/src/sys/kern/kern_shutdown.c:579
#3  0xc05e7dfa in _mtx_lock_sleep (m=0xc5e69e28, tid=3314788032, opts=0,
    file=0xc08f2e6b "/usr/local/src/sys/netinet6/in6.c", line=827)
    at /usr/local/src/sys/kern/kern_mutex.c:341
#4  0xc05e7ff1 in _mtx_lock_flags (m=0xc5e69e28, opts=0,
    file=0xc08f2e6b "/usr/local/src/sys/netinet6/in6.c", line=827)
    at /usr/local/src/sys/kern/kern_mutex.c:203
#5  0xc077829d in in6_update_ifa (ifp=0xc5e69c00, ifra=0xc5606b70,
    ia=0xc8d41800, flags=0) at /usr/local/src/sys/netinet6/in6.c:827
#6  0xc07961ec in in6_tmpifadd (ia0=0xc5e90200, forcegen=0, delay=0)
    at /usr/local/src/sys/netinet6/nd6_rtr.c:2007
#7  0xc079009c in regen_tmpaddr (ia6=0xc5e90000)
    at /usr/local/src/sys/netinet6/nd6.c:772
#8  0xc07916d5 in nd6_timer (arg=0x0) at
/usr/local/src/sys/netinet6/nd6.c:666
#9  0xc06097ea in softclock (arg=0xc0987dc0)
    at /usr/local/src/sys/kern/kern_timeout.c:430
#10 0xc05cfd95 in intr_event_execute_handlers (p=0xc5938aa0, ie=0xc593d600)
    at /usr/local/src/sys/kern/kern_intr.c:1220
#11 0xc05d0b6f in ithread_loop (arg=0xc58ddb60)
    at /usr/local/src/sys/kern/kern_intr.c:1233
#12 0xc05cdb28 in fork_exit (callout=0xc05d0ad0 <ithread_loop>,
    arg=0xc58ddb60, frame=0xc5606d38)
    at /usr/local/src/sys/kern/kern_fork.c:843
#13 0xc0849af0 in fork_trampoline ()
    at /usr/local/src/sys/i386/i386/exception.s:270
(kgdb)


The full core.txt.1 file is in my home dir on freefall.


Doug

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