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Date: Wed, 21 Sep 2011 17:13:39 +0400
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From: Sergey Kandaurov <pluknet@gmail.com>
To: Garrett Cooper <yanegomi@gmail.com>
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Cc: freebsd-net@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: LOR in route.c // scope6.c
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On 19 August 2011 05:07, Garrett Cooper <yanegomi@gmail.com> wrote:
> Hi,
> =A0 =A0I've periodically seen the following LOR when trying to repro a
> panic after restarting my network configuration:
>
> :lock order reversal:
> =A01st 0xc4142f1c rtentry (rtentry) @ /usr/src/sys/net/routec:362
> =A02nd 0xc3d08604 if_afdata (if_afdata) @ /usr/src/sys/netinet6/scope6.c:=
417
> KDB: stack backtrace:
> db_trace_self_wrapper(...)
> _witness_debugger(...)
> _rw_wlock(...)
> in6_setscope(...)
> in6_purgeaddr(...)
> in6_control(...)
> ifioctl(...)
> soo_ioctl(...)
> kern_ioctl(...)
> ioctl(...)
> syscallenter(...)
> syscall(...)
> Xint0x80_syscall()
>
> I don't have a full backtrace or core for this. This was running
> r224948 UP with WITNESS.
>

I just got exactly the same LOR on a very fresh current with
/etc/rc.d/netif restart, and then I lost the system.
Thanks for the report. I hope to dig out the solution...

--=20
wbr,
pluknet