Re: Fatal trap 12: page fault while in kernel mode

Recently  - starting when?

Thanks,
Kip



On Mon, Dec 8, 2008 at 2:47 PM, NAKAJI Hiroyuki <nakaji_at_jp.freebsd.org> wrote:
>>>>>> In <863ah2qivi.fsf_at_ra333.heimat.gr.jp>
>>>>>>   NAKAJI Hiroyuki <nakaji_at_jp.freebsd.org> wrote:
>
>> So, what I have to do are three:
>
>> 1. Full upgrade to the latest kernel and userland (world)
>> 2. Observe whether a panic occurs, and
>> 3. When panic, save the crash dump and get full bt with kgdb
>
>> I hope it will not reach to the step three. Thanks.
>
> Unfortunately, I faced to "db> " on my serial console.
>
> db> bt
> Tracing pid 964 tid 100131 td 0xc49876c0
> svc_run_internal(e6861d24,c0850793,c44f2780,e6861d38,1,...) at svc_run_internal+
> 0x575
> svc_thread_start(c44f2780,e6861d38,1,0,4836bd14,...) at svc_thread_start+0x10
> fork_exit(c0a57fe0,c44f2780,e6861d38) at fork_exit+0x93
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0, eip = 0xc, esp = 0x33, ebp = 0 ---
> db> call doadump
> Physical memory: 1010 MB
> Dumping 250 MB: 235 219 203 187 171 155 139 123 107 91 75 59 43 27 11
> Dump complete
> = 0xf
> db> bt
> Tracing pid 964 tid 100131 td 0xc49876c0
> svc_run_internal(e6861d24,c0850793,c44f2780,e6861d38,1,...) at svc_run_internal+
> 0x575
> svc_thread_start(c44f2780,e6861d38,1,0,4836bd14,...) at svc_thread_start+0x10
> fork_exit(c0a57fe0,c44f2780,e6861d38) at fork_exit+0x93
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0, eip = 0xc, esp = 0x33, ebp = 0 ---
> db> reset
>
> And then, I used kgdb.
>
> # kgdb /boot/kernel/kernel.symbols vmcore.9
> 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 "i386-marcel-freebsd"...
>
> Unread portion of the kernel message buffer:
>
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0x0
> fault code              = supervisor read, page not present
> instruction pointer     = 0x20:0xc0a57a75
> stack pointer           = 0x28:0xe6861c44
> frame pointer           = 0x28:0xe6861cec
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                        = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 964 (nfsd: service)
> Physical memory: 1010 MB
> Dumping 250 MB: 235 219 203 187 171 155 139 123 107 91 75 59 43 27 11
>
> Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /boot/kernel/linprocfs.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/linprocfs.ko
> Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/linux.ko
> Reading symbols from /boot/kernel/smbus.ko...Reading symbols from /boot/kernel/smbus.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/smbus.ko
> Reading symbols from /boot/kernel/aio.ko...Reading symbols from /boot/kernel/aio.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/aio.ko
> Reading symbols from /boot/kernel/mga.ko...Reading symbols from /boot/kernel/mga.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/mga.ko
> Reading symbols from /boot/kernel/drm.ko...Reading symbols from /boot/kernel/drm.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/drm.ko
> Reading symbols from /boot/kernel/atapicam.ko...Reading symbols from /boot/kernel/atapicam.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/atapicam.ko
> Reading symbols from /boot/kernel/nullfs.ko...Reading symbols from /boot/kernel/nullfs.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/nullfs.ko
> Reading symbols from /boot/kernel/logo_saver.ko...Reading symbols from /boot/kernel/logo_saver.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/logo_saver.ko
> #0  doadump () at pcpu.h:246
> 246     pcpu.h: No such file or directory.
>        in pcpu.h
> (kgdb) bt
> #0  doadump () at pcpu.h:246
> #1  0xc04c2a69 in db_fncall (dummy1=-1059812576, dummy2=0, dummy3=-1067505768,
>    dummy4=0xe68619d8 "�:i�\2008'�") at /usr/src/sys/ddb/db_command.c:548
> #2  0xc04c2e61 in db_command (last_cmdp=0xc0d3e85c, cmd_table=0x0, dopager=1)
>    at /usr/src/sys/ddb/db_command.c:445
> #3  0xc04c2fba in db_command_loop () at /usr/src/sys/ddb/db_command.c:498
> #4  0xc04c4dfd in db_trap (type=12, code=0) at /usr/src/sys/ddb/db_main.c:229
> #5  0xc08a2456 in kdb_trap (type=12, code=0, tf=0xe6861c04)
>    at /usr/src/sys/kern/subr_kdb.c:534
> #6  0xc0b8059f in trap_fatal (frame=0xe6861c04, eva=0)
>    at /usr/src/sys/i386/i386/trap.c:920
> #7  0xc0b80860 in trap_pfault (frame=0xe6861c04, usermode=0, eva=0)
>    at /usr/src/sys/i386/i386/trap.c:842
> #8  0xc0b8126a in trap (frame=0xe6861c04) at /usr/src/sys/i386/i386/trap.c:522
> #9  0xc0b652cb in calltrap () at /usr/src/sys/i386/i386/exception.s:165
> #10 0xc0a57a75 in svc_run_internal (pool=0xc44f2780, ismaster=0)
>    at /usr/src/sys/rpc/svc.c:787
> #11 0xc0a57ff0 in svc_thread_start (arg=0xc44f2780)
>    at /usr/src/sys/rpc/svc.c:1188
> #12 0xc0850793 in fork_exit (callout=0xc0a57fe0 <svc_thread_start>,
>    arg=0xc44f2780, frame=0xe6861d38) at /usr/src/sys/kern/kern_fork.c:821
> #13 0xc0b65340 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:270
> (kgdb)
>
> In addition,
>
> # addr2line -e /boot/kernel/kernel.symbols 0xc0a57a75
> /usr/src/sys/rpc/svc.c:787
>
> Any help is appreciated. Thanks.
> --
> NAKAJI Hiroyuki
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