Date: Sat, 15 Aug 2009 17:42:41 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: Lawrence Stewart <lstewart@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Fatal trap 12: page fault while in kernel mode - current process: flowcleaner Message-ID: <20090815174241.60dd9b12@r500.local> In-Reply-To: <4A7C2395.6020600@freebsd.org> References: <20090807142027.1a30e8ba@fabiankeil.de> <4A7C2395.6020600@freebsd.org>
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--Sig_/avzo__pNTjlBnhkfBtqgYLw Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Lawrence Stewart <lstewart@freebsd.org> wrote: > Fabian Keil wrote: > > Using: > >=20 > > FreeBSD TP51.local 8.0-BETA2 FreeBSD 8.0-BETA2 #36: Sat Aug 1 00:07:09= CEST 2009 > > fk@TP51.local:/usr/obj/usr/src/sys/THINKPAD i386 > >=20 > > I got the following panic: > >=20 > > fk@TP51 /usr/crash $kgdb /boot/kernel/kernel.symbols vmcore.6 > > GNU gdb 6.1.1 [FreeBSD] > > Copyright 2004 Free Software Foundation, Inc. > > GDB is free software, covered by the GNU General Public License, and yo= u are > > welcome to change it and/or distribute copies of it under certain condi= tions. > > Type "show copying" to see the conditions. > > There is absolutely no warranty for GDB. Type "show warranty" for deta= ils. > > This GDB was configured as "i386-marcel-freebsd"... > >=20 > > Unread portion of the kernel message buffer: > >=20 > >=20 > > 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 0x20:0x0 > > stack pointer =3D 0x28:0xf1a2fc94 > > frame pointer =3D 0x28:0xf1a2fcd8 > > 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 40 (flowcleaner) > > panic: from debugger > > cpuid =3D 0 > > Uptime: 2m1s > > Physical memory: 998 MB > > Dumping 144 MB: 129 113 97 81 65 49 33 17 1 > >=20 > > Reading symbols from /boot/kernel/unionfs.ko...Reading symbols from /bo= ot/kernel/unionfs.ko.symbols...done. > > done. > > [...] > > Loaded symbols for /boot/kernel/fdescfs.ko > > #0 doadump () at pcpu.h:246 > > 246 pcpu.h: No such file or directory. > > in pcpu.h > > (kgdb) where > > #0 doadump () at pcpu.h:246 > > #1 0xc0678e66 in boot (howto=3D260) at /usr/src/sys/kern/kern_shutdown= .c:419 > > #2 0xc06790a2 in panic (fmt=3DVariable "fmt" is not available. > > ) at /usr/src/sys/kern/kern_shutdown.c:575 > > #3 0xc04f2e57 in db_panic (addr=3DCould not find the frame base for "d= b_panic". > > ) at /usr/src/sys/ddb/db_command.c:478 > > #4 0xc04f33e1 in db_command (last_cmdp=3D0xc0a1f31c, cmd_table=3D0x0, = dopager=3D1) at /usr/src/sys/ddb/db_command.c:445 > > #5 0xc04f353a in db_command_loop () at /usr/src/sys/ddb/db_command.c:4= 98 > > #6 0xc04f532d in db_trap (type=3D12, code=3D0) at /usr/src/sys/ddb/db_= main.c:229 > > #7 0xc06a33c6 in kdb_trap (type=3D12, code=3D0, tf=3D0xf1a2fc54) at /u= sr/src/sys/kern/subr_kdb.c:534 > > #8 0xc0913a8f in trap_fatal (frame=3D0xf1a2fc54, eva=3D0) at /usr/src/= sys/i386/i386/trap.c:924 > > #9 0xc0913cc3 in trap_pfault (frame=3D0xf1a2fc54, usermode=3D0, eva=3D= 0) at /usr/src/sys/i386/i386/trap.c:846 > > #10 0xc091469a in trap (frame=3D0xf1a2fc54) at /usr/src/sys/i386/i386/t= rap.c:528 > > #11 0xc08f83bb in calltrap () at /usr/src/sys/i386/i386/exception.s:165 > > #12 0x00000000 in ?? () > > Previous frame inner to this frame (corrupt stack?) > >=20 > > The backtrace in ddb mentioned several flow* functions, > > but unfortunately it doesn't seem to have survived the > > dump. > >=20 > > The problem occurred after booting the system with the rc.conf line: > > ifconfig_wlan0=3D"inet 192.168.178.49 -wme" > > changing it to: > > ifconfig_wlan0=3D"inet 192.168.178.49 ssid [...] wepkey 1:[0x...] def= txkey 1 wepmode on chanlist 7 -wme" > > running: > > /etc/rc.d/netif restart > > followed by: > > ifconfig wlan0 > > which showed that wlan0 got associated. > > The panic happened less than a second later. > >=20 > > The system is an IBM ThinkPad R51 with iwi0 as wlandev. > > em0 was configured and up but unconnected. > I can reliably trigger a flowcleaner panic as well on my Toshiba R600=20 > laptop with a rum based WIFI dongle (D-Link DWA-110). I only get it on=20 > teardown/detach though. Kip is aware of the issue and will hopefully=20 > have a patch for us at some point. Thanks for the information. Did you try disabling options FLOWTABLE already? It doesn't strike me as particularly useful on a laptop anyway. Fabian --Sig_/avzo__pNTjlBnhkfBtqgYLw Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkqG13sACgkQBYqIVf93VJ01WQCgv2bkE7g+x29tbP/4qOr6uw/x F9oAoI9Dhjm5Phw0fRny1Fn/P9ZW8zH0 =z+nt -----END PGP SIGNATURE----- --Sig_/avzo__pNTjlBnhkfBtqgYLw--
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