Date: Mon, 1 Oct 2012 11:05:30 -0400 From: Kim Culhan <w8hdkim@gmail.com> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: panic possibly on on bridge member removal Message-ID: <CAKZxVQV2L1VW=n9s9OUEO-XckUEOHgXrgRiFV9Eod-se9PsD0Q@mail.gmail.com> In-Reply-To: <201210010949.08943.jhb@freebsd.org> References: <CAKZxVQU0azfJShEiRgjsCu2aRqcBFi1qV7HDajFY2y=Dz084Gw@mail.gmail.com> <201210010804.08925.jhb@freebsd.org> <CAKZxVQWFKBD3Q3uMMr94aMZgckHhu-MPzC1WiQpoNR%2BsuOWi1Q@mail.gmail.com> <201210010949.08943.jhb@freebsd.org>
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On Mon, Oct 1, 2012 at 9:49 AM, John Baldwin <jhb@freebsd.org> wrote:
> On Monday, October 01, 2012 9:08:30 am Kim Culhan wrote:
>> On Mon, Oct 1, 2012 at 8:04 AM, John Baldwin <jhb@freebsd.org> wrote:
>> > On Saturday, September 29, 2012 8:40:03 am Kim Culhan wrote:
>> >> After a few hours of operation involving tap0 added to the bridge
>> >> running openvpn
>> >> and shutting down openvpn which removes tap0 from the bridge, the
>> >> machine is found to have a panic:
>> >>
>> >> Fatal trap 12: page fault while in kernel mode
>> >> cpuid = 1; apic id = 01
>> >> fault virtual address = 0x188
>> >> fault code = supervisor read data, page not present
>> >> instruction pointer = 0x20:0xffffffff82a14f96
>> >> stack pointer = 0x28:0xffffff8000285670
>> >> frame pointer = 0x28:0xffffff80002856b0
>> >> code segment = base 0x0, limit 0xfffff, type 0x1b
>> >> = DPL 0, pres 1, long 1, def32 0, gran 1
>> >> processor eflags = interrupt enabled, resume, IOPL = 0
>> >> current process = 12 (swi5: fast taskq)
>> >> [ thread pid 12 tid 100022 ]
>> >> Stopped at bridge_enqueue+0x86: calll *0x188(%r12)
>> >> db> bt
>> >> Tracing pid 12 tid 100022 td 0xfffffe0003aff000
>> >> bridge_enqueue() at bridge_enqueue+0x86
>> >
>> > Can you run 'gdb /boot/kernel/kernel' and do 'l *bridge_enqueue+0x86'?
>> >
>> > --
>> > John Baldwin
>>
>> (gdb) l *bridge_enqueue+0x86
>> No symbol "bridge_enqueue" in current context.
>> (gdb)
>
> Oh, are you using if_bridge.ko as a module? If so, you can try running 'gdb
> /boot/kernel/if_bridge.ko' instead.
(gdb) l *bridge_enqueue+0x86
0x2f96 is in bridge_enqueue
(/usr/src/sys/modules/if_bridge/../../net/if_bridge.c:1810).
1805 continue;
1806 }
1807 m->m_flags &= ~M_VLANTAG;
1808 }
1809
1810 if ((err = dst_ifp->if_transmit(dst_ifp, m))) {
1811 m_freem(m0);
1812 break;
1813 }
1814 }
(gdb)
--
-lo,
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