Date: Mon, 1 Oct 2012 09:49:08 -0400 From: John Baldwin <jhb@freebsd.org> To: Kim Culhan <w8hdkim@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: panic possibly on on bridge member removal Message-ID: <201210010949.08943.jhb@freebsd.org> In-Reply-To: <CAKZxVQWFKBD3Q3uMMr94aMZgckHhu-MPzC1WiQpoNR%2BsuOWi1Q@mail.gmail.com> References: <CAKZxVQU0azfJShEiRgjsCu2aRqcBFi1qV7HDajFY2y=Dz084Gw@mail.gmail.com> <201210010804.08925.jhb@freebsd.org> <CAKZxVQWFKBD3Q3uMMr94aMZgckHhu-MPzC1WiQpoNR%2BsuOWi1Q@mail.gmail.com>
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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. -- John Baldwin
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