Date: Tue, 09 Dec 2008 07:47:35 +0900 From: NAKAJI Hiroyuki <nakaji@jp.freebsd.org> To: freebsd-current@freebsd.org Subject: Re: Fatal trap 12: page fault while in kernel mode Message-ID: <86iqpu2sjc.fsf@ra333.heimat.gr.jp> In-Reply-To: <863ah2qivi.fsf@ra333.heimat.gr.jp> (NAKAJI Hiroyuki's message of "Sat, 06 Dec 2008 08:53:21 %2B0900") References: <87zljb8nw6.fsf@roddy.4407.kankyo-u.ac.jp> <3a142e750812050613w4e9155bat950f03716aa58beb@mail.gmail.com> <863ah2qivi.fsf@ra333.heimat.gr.jp>
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>>>>> In <863ah2qivi.fsf@ra333.heimat.gr.jp>=20
>>>>> NAKAJI Hiroyuki <nakaji@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_inte=
rnal+
0x575
svc_thread_start(c44f2780,e6861d38,1,0,4836bd14,...) at svc_thread_start+0x=
10
fork_exit(c0a57fe0,c44f2780,e6861d38) at fork_exit+0x93
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip =3D 0xc, esp =3D 0x33, ebp =3D 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
=3D 0xf
db> bt
Tracing pid 964 tid 100131 td 0xc49876c0
svc_run_internal(e6861d24,c0850793,c44f2780,e6861d38,1,...) at svc_run_inte=
rnal+
0x575
svc_thread_start(c44f2780,e6861d38,1,0,4836bd14,...) at svc_thread_start+0x=
10
fork_exit(c0a57fe0,c44f2780,e6861d38) at fork_exit+0x93
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip =3D 0xc, esp =3D 0x33, ebp =3D 0 ---
db> reset
And then, I used kgdb.
# kgdb /boot/kernel/kernel.symbols vmcore.9=20
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 condition=
s.
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 =3D 0; apic id =3D 00
fault virtual address =3D 0x0
fault code =3D supervisor read, page not present
instruction pointer =3D 0x20:0xc0a57a75
stack pointer =3D 0x28:0xe6861c44
frame pointer =3D 0x28:0xe6861cec
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D 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/ker=
nel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/smbus.ko...Reading symbols from /boot/ker=
nel/smbus.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/smbus.ko
Reading symbols from /boot/kernel/aio.ko...Reading symbols from /boot/kerne=
l/aio.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/aio.ko
Reading symbols from /boot/kernel/mga.ko...Reading symbols from /boot/kerne=
l/mga.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/mga.ko
Reading symbols from /boot/kernel/drm.ko...Reading symbols from /boot/kerne=
l/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/ke=
rnel/nullfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/nullfs.ko
Reading symbols from /boot/kernel/logo_saver.ko...Reading symbols from /boo=
t/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=3D-1059812576, dummy2=3D0, dummy3=3D-10=
67505768,=20
dummy4=3D0xe68619d8 "=EF=BF=BD:i=EF=BF=BD\2008'=EF=BF=BD") at /usr/src/=
sys/ddb/db_command.c:548
#2 0xc04c2e61 in db_command (last_cmdp=3D0xc0d3e85c, cmd_table=3D0x0, dopa=
ger=3D1)
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=3D12, code=3D0) at /usr/src/sys/ddb/db_main=
.c:229
#5 0xc08a2456 in kdb_trap (type=3D12, code=3D0, tf=3D0xe6861c04)
at /usr/src/sys/kern/subr_kdb.c:534
#6 0xc0b8059f in trap_fatal (frame=3D0xe6861c04, eva=3D0)
at /usr/src/sys/i386/i386/trap.c:920
#7 0xc0b80860 in trap_pfault (frame=3D0xe6861c04, usermode=3D0, eva=3D0)
at /usr/src/sys/i386/i386/trap.c:842
#8 0xc0b8126a in trap (frame=3D0xe6861c04) 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=3D0xc44f2780, ismaster=3D0)
at /usr/src/sys/rpc/svc.c:787
#11 0xc0a57ff0 in svc_thread_start (arg=3D0xc44f2780)
at /usr/src/sys/rpc/svc.c:1188
#12 0xc0850793 in fork_exit (callout=3D0xc0a57fe0 <svc_thread_start>,=20
arg=3D0xc44f2780, frame=3D0xe6861d38) at /usr/src/sys/kern/kern_fork.c:=
821
#13 0xc0b65340 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:=
270
(kgdb)=20
In addition,
# addr2line -e /boot/kernel/kernel.symbols 0xc0a57a75
/usr/src/sys/rpc/svc.c:787
Any help is appreciated. Thanks.
--=20
NAKAJI Hiroyuki
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