Date: Thu, 20 Jan 2011 14:46:02 +0300 From: Alexander Zagrebin <alex@zagrebin.ru> To: Bernhard Schmidt <bschmidt@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: if_run and wlan_amrr: kernel panics on 8.2-PRERELEASE amd64 Message-ID: <20110120114602.GA3567@gw.zagrebin.ru> In-Reply-To: <201101191757.00538.bschmidt@freebsd.org> References: <20110118102658.GA3211@gw.zagrebin.ru> <20110119112330.GD13844@gw.zagrebin.ru> <201101191240.16198.bschmidt@freebsd.org> <201101191757.00538.bschmidt@freebsd.org>
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Hi!
On 19.01.2011 17:57:00 +0100, Bernhard Schmidt wrote:
> > > So there is the one issue only: the panic if runfw.ko and
> > > wlan_amrr.ko both loaded via loader.conf.
> > > Have you any ideas?
> >
> > No yet, I'll dig around there later today.
>
> Hmm, I'm not able to reproduce this, works as expected. Is this still the same
> backtrace as the previous error?
It seems that no. I've recompiled a kernel with the KDB support and got this:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x308
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff8030161a
stack pointer = 0x28:0xffffffff80b7ec30
frame pointer = 0x28:0xffffffff80b7ec60
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = resume, IOPL = 0
current process = 0 (swapper)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff8033408e at kdb_backtrace+0x5e
#1 0xffffffff80303037 at panic+0x187
#2 0xffffffff804cbbd0 at trap_fatal+0x290
#3 0xffffffff804cbfaf at trap_pfault+0x28f
#4 0xffffffff804cc48f at trap+0x3df
#5 0xffffffff804b4594 at calltrap+0x8
#6 0xffffffff8041a4e0 at LibAliasAttachHandlers+0x160
#7 0xffffffff80b71024 at mod_handler+0x14
#8 0xffffffff802f2318 at module_register_init+0xb8
#9 0xffffffff802bdc77 at mi_startup+0x77
#10 0xffffffff80162b3c at btext+0x2c
Uptime: 1s
Automatic reboot in 15 seconds - press a key on the console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.
I have an 'alias_pptp_load="YES"' in the loader.conf, so I've disabled
alias_pptp.ko instead of if_run.ko, runfw.ko or wlan_amrr.ko,
and the system was successfully booted.
It's very strange...
# kgdb kernel.debug
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...
(kgdb) list *LibAliasAttachHandlers+0x160
0xffffffff8041a4e0 is in LibAliasAttachHandlers (../../../netinet/libalias/alias_mod.c:84).
79 }
80
81 static __inline void
82 LIBALIAS_WLOCK(void)
83 {
84 rw_wlock(&handler_rw);
85 }
86
87 static __inline void
88 LIBALIAS_WUNLOCK(void)
(kgdb)
I understand, that it isn't wlan problem now, but may be you have any thoughts?
--
Alexander Zagrebin
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