Date: Wed, 14 Jul 2004 23:48:40 +0800 (KRAST) From: Eugene Grosbein <eugen@grosbein.pp.ru> To: FreeBSD-gnats-submit@freebsd.org Cc: hackers@freebsd.org Subject: kernel reads unmapped memory while unloading modules Message-ID: <200407141548.i6EFmeb7000623@grosbein.pp.ru>
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>Submitter-Id: current-users
>Originator: Eugene Grosbein
>Organization: Svyaz Service JSC
>Confidential: no
>Synopsis: kernel reads unmapped memory while unloading modules
>Severity: serious
>Priority: low
>Category: kern
>Class: sw-bug
>Release: FreeBSD 4.10-STABLE i386
>Environment:
System: FreeBSD grosbein.pp.ru 4.10-STABLE FreeBSD 4.10-STABLE #11: Wed Jul 14 22:10:30 KRAST 2004 eu@grosbein.pp.ru:/usr/local/obj/usr/local/src/sys/DADV i386
>Description:
Page fault while in kernel mode occures after
kldload snd.ko/kldunload snd.ko regardless of presence
of audio hardware. The same panic occures for custom kernel
and for GENERIC, for Pentium notebook and for Celeron-900E desktop,
with Yamaha OPL3-SA2, with Crystal Sound CS4232 or without any
sound card.
>How-To-Repeat:
Boot a kernel without device pcm into single or multiuser mode,
kldload /modules/snd.ko, kldunload snd.ko and get kernel panic.
Single mode was used to simplify things. A patch for
src/sys/kern/kern_linker.c,1.41.2.3 was used to obtain detailed
debug printfs:
--- kern_linker.c.orig Tue Jul 13 22:20:11 2004
+++ kern_linker.c Wed Jul 14 22:06:25 2004
@@ -27,6 +27,7 @@
*/
#include "opt_ddb.h"
+#define KLD_DEBUG
#include <sys/param.h>
#include <sys/kernel.h>
@@ -47,7 +48,7 @@
#include <vm/vm_zone.h>
#ifdef KLD_DEBUG
-int kld_debug = 0;
+int kld_debug = 1;
#endif
MALLOC_DEFINE(M_LINKER, "kld", "kernel linker");
@@ -180,6 +181,7 @@
* Since some things care about execution order, this is the
* operation which ensures continued function.
*/
+ KLD_DPF(FILE, ("linker_file_sysuninit: ls_items=%p\n", sysuninits->ls_items));
for (sipp = (struct sysinit **)sysuninits->ls_items; *sipp; sipp++) {
for (xipp = sipp + 1; *xipp; xipp++) {
if ((*sipp)->subsystem > (*xipp)->subsystem ||
@@ -202,6 +204,7 @@
continue; /* skip dummy task(s)*/
/* Call function */
+ KLD_DPF(FILE, ("linker_file_sysuninit: calling function %p, address stored at %p", (*sipp)->func,&((*sipp)->func)));
(*((*sipp)->func))((*sipp)->udata);
}
}
Here is a script of debug session made using serial console,
0xc1f5bb8c is a value of (*sipp)->func in the last loop
of function linker_file_sysuninit() that triggers panic
and 0xc200530c is an address of variable (*sipp)->func itself.
Default: 1:ad(1,a)/boot/loader
boot: -h
Console: serial port
BIOS drive A: is disk0
BIOS drive C: is disk1
BIOS drive D: is disk2
BIOS 639kB/523200kB available memory
FreeBSD/i386 bootstrap loader, Revision 0.8
(eu@grosbein.pp.ru, Tue Jul 6 02:01:55 KRAST 2004)
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [kernel] in 1 second...
Type '?' for a list of commands, 'help' for more detailed help.
ok boot -s
Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.10-STABLE #11: Wed Jul 14 22:10:30 KRAST 2004
eu@grosbein.pp.ru:/usr/local/obj/usr/local/src/sys/DADV
Timecounter "i8254" frequency 1193168 Hz
CPU: Intel Celeron (902.03-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x68a Stepping = 10
Features=0x383f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory = 536805376 (524224K bytes)
config> flags atkbd 0x0
config> quit
sio0: gdb debugging port
avail memory = 518860800 (506700K bytes)
linker_make_file: new file, filename=kernel
Preloaded elf kernel "kernel" at 0xc036a000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc036a0a8.
VESA: v2.0, 65536k memory, flags:0x1, mode table:0xc03023a2 (1000022)
VESA: ATI RADEON 9200
Pentium Pro MTRR support enabled
Using $PIR table, 8 entries at 0xc00fdef0
apm0: <APM BIOS> on motherboard
apm0: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
agp0: <Intel 82443BX (440 BX) host to PCI bridge> mem 0xe8000000-0xebffffff at device 0.0 on pci0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <ATI model 5961 graphics accelerator> at 0.0 irq 11
pci1: <ATI model 5941 graphics accelerator> at 0.1
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xe000-0xe01f irq 10 at device 7.2 on pci0
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uscanner0: Hewlett-Packard HP ScanJet 2200C, rev 1.10/1.00, addr 2
uhid0: American Power Conversion Back-UPS 500 FW: 6.5.I USB FW: c1, rev 1.10/1.00, addr 3, iclass 3/0
intpm0: <Intel 82371AB Power management controller> port 0x5000-0x500f irq 9 at device 7.3 on pci0
intpm0: I/O mapped 5000
intpm0: intr IRQ 9 enabled revision 0
smbus0: <System Management Bus> on intsmb0
smb0: <SMBus general purpose I/O> on smbus0
intpm0: PM I/O mapped 4000
fxp0: <Intel 82557 Pro/100 Ethernet> port 0xe400-0xe41f mem 0xef000000-0xef0fffff,0xef100000-0xef100fff irq 9 at device 16.0 on pci0
fxp0: Ethernet address 00:a0:c9:89:95:1f
inphy0: <i82555 10/100 media interface> on miibus0
inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
orm0: <Option ROM> at iomem 0xc0000-0xccfff on isa0
pmtimer0 on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model NetMouse/NetScroll Optical, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> on isa0
sc0: VGA <24 virtual consoles, flags=0x0>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x90 on isa0
sio0: type 16550A, console
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/16 bytes threshold
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to deny, logging unlimited
DUMMYNET initialized (011031)
IPsec: Initialized Security Association Processing.
ad0: 6149MB <WDC AC26400B> [13328/15/63] at ata0-master UDMA33
ad2: 39266MB <IC35L040AVER07-0> [79779/16/63] at ata1-master tagged UDMA33
acd0: CD-RW <SONY CD-RW CRX140E> at ata0-slave PIO4
Mounting root from ufs:/dev/ad2s1a
Enter full pathname of shell or RETURN for /bin/sh:
Cannot read termcap database;
using dumb terminal settings.
# ~~Stopped at siointr1+0x106: movl $0,brk_state2.766
db> hwatch 0xc1f5bb8c
db> hwatch 0xc200530c
db> c
#
# kldload /modules/snd.ko
linker_load_file: trying to load /modules/snd.ko as a.out
linker_load_file: trying to load /modules/snd.ko as elf32
linker_make_file: new file, filename=snd.ko
linker_load_file: trying to load snd_pcm as a.out
linker_load_file: trying to load snd_pcm as elf32
Stopped at generic_bcopy+0x1a: repe movsl (%esi),%es:(%edi)
db> trace
generic_bcopy(cc6b7000,4000,db085ca4,11138,da6a0080) at generic_bcopy+0x1a
ffs_read(db085c90,c1f4d094,0,db085d38,c1f5a000) at ffs_read+0x343
vn_rdwr(0,da6a0080,c1f4e000,11138,0) at vn_rdwr+0xb3
link_elf_load_file(c1df5c30,db085dec,c104ff20,db085dec,0) at link_elf_load_file+0x2bf
link_elf_load_module(c1df5c30,db085dec,c1f4c4a8,0,c1f45b00) at link_elf_load_module+0x29
linker_load_file(c1f4b335,db085e0c,0,2,db085e5c) at linker_load_file+0x124
load_dependancies(c1f45a80,c104ff20,db085f10,2,c1f4c480) at load_dependancies+0x4d
link_elf_load_file(c1f47c00,db085f10,c104ff20,db085f10,2) at link_elf_load_file+0x39e
link_elf_load_module(c1f47c00,db085f10,0,c1f47c00,d4787dc0) at link_elf_load_module+0x29
linker_load_file(c1f47c00,db085f30,d4787dc0,1,db085f80) at linker_load_file+0x140
kldload(d4787dc0,db085f80,bfbffd1c,0,0) at kldload+0xa6
syscall2(2f,2f,2f,0,0) at syscall2+0x1a9
Xint0x80_syscall() at Xint0x80_syscall+0x25
db> c
linker_make_file: new file, filename=snd_pcm.ko
linker_file_register_sysctls: registering SYSCTLs for snd_pcm.ko
linker_file_register_sysctls: SYSCTLs 0xc1f622e0
linker_file_sysinit: calling SYSINITs for snd_pcm.ko
linker_file_sysinit: SYSINITs 0xc1f622fc
linker_load_file: trying to load snd_ad1816 as a.out
linker_load_file: trying to load snd_ad1816 as elf32
linker_make_file: new file, filename=snd_ad1816.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_ad1816.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_ad1816.ko
linker_file_sysinit: SYSINITs 0xc1f6e4c0
linker_load_file: trying to load snd_als4000 as a.out
linker_load_file: trying to load snd_als4000 as elf32
linker_make_file: new file, filename=snd_als4000.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_als4000.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_als4000.ko
linker_file_sysinit: SYSINITs 0xc1f73600
linker_load_file: trying to load snd_cmi as a.out
linker_load_file: trying to load snd_cmi as elf32
linker_make_file: new file, filename=snd_cmi.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_cmi.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_cmi.ko
linker_file_sysinit: SYSINITs 0xc1f788c0
linker_load_file: trying to load snd_cs4281 as a.out
linker_load_file: trying to load snd_cs4281 as elf32
linker_make_file: new file, filename=snd_cs4281.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_cs4281.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_cs4281.ko
linker_file_sysinit: SYSINITs 0xc1f7fc20
linker_load_file: trying to load snd_csa as a.out
linker_load_file: trying to load snd_csa as elf32
linker_make_file: new file, filename=snd_csa.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_csa.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_csa.ko
linker_file_sysinit: SYSINITs 0xc1f86f20
linker_load_file: trying to load snd_ds1 as a.out
linker_load_file: trying to load snd_ds1 as elf32
linker_make_file: new file, filename=snd_ds1.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_ds1.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_ds1.ko
linker_file_sysinit: SYSINITs 0xc1f934c0
linker_load_file: trying to load snd_emu10k1 as a.out
linker_load_file: trying to load snd_emu10k1 as elf32
linker_make_file: new file, filename=snd_emu10k1.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_emu10k1.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_emu10k1.ko
linker_file_sysinit: SYSINITs 0xc1f9b000
linker_load_file: trying to load snd_es137x as a.out
linker_load_file: trying to load snd_es137x as elf32
linker_make_file: new file, filename=snd_es137x.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_es137x.ko
linker_file_register_sysctls: SYSCTLs 0xc1fa2640
linker_file_sysinit: calling SYSINITs for snd_es137x.ko
linker_file_sysinit: SYSINITs 0xc1fa264c
linker_load_file: trying to load snd_fm801 as a.out
linker_load_file: trying to load snd_fm801 as elf32
linker_make_file: new file, filename=snd_fm801.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_fm801.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_fm801.ko
linker_file_sysinit: SYSINITs 0xc1fa95a0
linker_load_file: trying to load snd_ich as a.out
linker_load_file: trying to load snd_ich as elf32
linker_make_file: new file, filename=snd_ich.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_ich.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_ich.ko
linker_file_sysinit: SYSINITs 0xc1fb0c00
linker_load_file: trying to load snd_maestro as a.out
linker_load_file: trying to load snd_maestro as elf32
linker_make_file: new file, filename=snd_maestro.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_maestro.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_maestro.ko
linker_file_sysinit: SYSINITs 0xc1fb74a0
linker_load_file: trying to load snd_maestro3 as a.out
linker_load_file: trying to load snd_maestro3 as elf32
linker_make_file: new file, filename=snd_maestro3.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_maestro3.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_maestro3.ko
linker_file_sysinit: SYSINITs 0xc1fc2a40
linker_load_file: trying to load snd_mss as a.out
linker_load_file: trying to load snd_mss as elf32
linker_make_file: new file, filename=snd_mss.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_mss.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_mss.ko
linker_file_sysinit: SYSINITs 0xc1fcd640
pcm0: <Yamaha OPL-SAx> at port 0x220-0x22f,0x530-0x537,0x388-0x38f,0x330-0x331,0x370-0x371 irq 5 drq 0,1 on isa0
linker_load_file: trying to load snd_neomagic as a.out
linker_load_file: trying to load snd_neomagic as elf32
linker_make_file: new file, filename=snd_neomagic.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_neomagic.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_neomagic.ko
linker_file_sysinit: SYSINITs 0xc1fe9ae0
linker_load_file: trying to load snd_solo as a.out
linker_load_file: trying to load snd_solo as elf32
linker_make_file: new file, filename=snd_solo.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_solo.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_solo.ko
linker_file_sysinit: SYSINITs 0xc1feec00
linker_load_file: trying to load snd_t4dwave as a.out
linker_load_file: trying to load snd_t4dwave as elf32
linker_make_file: new file, filename=snd_t4dwave.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_t4dwave.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_t4dwave.ko
linker_file_sysinit: SYSINITs 0xc1ff4c00
linker_load_file: trying to load snd_via82c686 as a.out
linker_load_file: trying to load snd_via82c686 as elf32
linker_make_file: new file, filename=snd_via82c686.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_via82c686.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_via82c686.ko
linker_file_sysinit: SYSINITs 0xc1ff9fc0
linker_load_file: trying to load snd_vibes as a.out
linker_load_file: trying to load snd_vibes as elf32
linker_make_file: new file, filename=snd_vibes.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_vibes.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_vibes.ko
linker_file_sysinit: SYSINITs 0xc2000ac0
linker_load_file: trying to load snd_sbc as a.out
linker_load_file: trying to load snd_sbc as elf32
Stopped at generic_bcopy+0x1a: repe movsl (%esi),%es:(%edi)
db> trace
generic_bcopy(cc7a52a0,2c0,db085ca4,2c0,da69f240) at generic_bcopy+0x1a
ffs_read(db085c90,0,1,db085d38,c20052a0) at ffs_read+0x343
vn_rdwr(0,da69f240,c20052a0,2c0,22a0) at vn_rdwr+0xb3
link_elf_load_file(c1df5580,db085dec,c104ff20,db085dec,0) at link_elf_load_file+0x2bf
link_elf_load_module(c1df5580,db085dec,c1f4c540,0,c1f45b00) at link_elf_load_module+0x29
linker_load_file(c1f4b3fb,db085e0c,0,2,db085e5c) at linker_load_file+0x124
load_dependancies(c1f45a80,c104ff20,db085f10,2,c1f4c480) at load_dependancies+0x4d
link_elf_load_file(c1f47c00,db085f10,c104ff20,db085f10,2) at link_elf_load_file+0x39e
link_elf_load_module(c1f47c00,db085f10,0,c1f47c00,d4787dc0) at link_elf_load_module+0x29
linker_load_file(c1f47c00,db085f30,d4787dc0,1,db085f80) at linker_load_file+0x140
kldload(d4787dc0,db085f80,bfbffd1c,0,0) at kldload+0xa6
syscall2(2f,2f,2f,0,0) at syscall2+0x1a9
Xint0x80_syscall() at Xint0x80_syscall+0x25
db> c
linker_make_file: new file, filename=snd_sbc.ko
Stopped at elf_reloc+0xc9: jmp elf_reloc+0xdc
db> trace
elf_reloc(c1fab080,c2003060,1,c200297f,c1fab200,2301) at elf_reloc+0xc9
relocate_file(c1fab080,c104ff20,db085dec,0,c20052a0) at relocate_file+0x3d
link_elf_load_file(c1df5580,db085dec,c104ff20,db085dec,0) at link_elf_load_file+0x3b7
link_elf_load_module(c1df5580,db085dec,c1f4c540,0,c1f45b00) at link_elf_load_module+0x29
linker_load_file(c1f4b3fb,db085e0c,0,2,db085e5c) at linker_load_file+0x124
load_dependancies(c1f45a80,c104ff20,db085f10,2,c1f4c480) at load_dependancies+0x4d
link_elf_load_file(c1f47c00,db085f10,c104ff20,db085f10,2) at link_elf_load_file+0x39e
link_elf_load_module(c1f47c00,db085f10,0,c1f47c00,d4787dc0) at link_elf_load_module+0x29
linker_load_file(c1f47c00,db085f30,d4787dc0,1,db085f80) at linker_load_file+0x140
kldload(d4787dc0,db085f80,bfbffd1c,0,0) at kldload+0xa6
syscall2(2f,2f,2f,0,0) at syscall2+0x1a9
Xint0x80_syscall() at Xint0x80_syscall+0x25
db> c
linker_file_register_sysctls: registering SYSCTLs for snd_sbc.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_sbc.ko
linker_file_sysinit: SYSINITs 0xc20054c0
linker_load_file: trying to load snd_sb16 as a.out
linker_load_file: trying to load snd_sb16 as elf32
linker_make_file: new file, filename=snd_sb16.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_load_file: file snd_sbc is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_sb16.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_sb16.ko
linker_file_sysinit: SYSINITs 0xc200b5c0
linker_load_file: trying to load snd_sb8 as a.out
linker_load_file: trying to load snd_sb8 as elf32
linker_make_file: new file, filename=snd_sb8.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_load_file: file snd_sbc is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_sb8.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_sb8.ko
linker_file_sysinit: SYSINITs 0xc20121c0
linker_load_file: trying to load snd_ess as a.out
linker_load_file: trying to load snd_ess as elf32
linker_make_file: new file, filename=snd_ess.ko
linker_load_file: file snd_pcm is already loaded, incrementing refs
linker_load_file: file snd_sbc is already loaded, incrementing refs
linker_file_register_sysctls: registering SYSCTLs for snd_ess.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd_ess.ko
linker_file_sysinit: SYSINITs 0xc2018d20
linker_file_register_sysctls: registering SYSCTLs for snd.ko
linker_file_register_sysctls: SYSCTLs 0
linker_file_sysinit: calling SYSINITs for snd.ko
linker_file_sysinit: SYSINITs 0xc1f4c49c
#
# ~~Stopped at siointr1+0x106: movl $0,brk_state2.766
db> examine 0xc1f5bb8c
sndstat_unregisterfile: 56e58955
db> examine 0xc200530c
sdf_31_sys_uninit+0x8: c1f5bb8c
db> c
# kldunload snd.ko
kldunload: lf->userrefs=1
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd.ko
linker_file_sysuninit: SYSUNINITs 0
linker_file_unregister_sysctls: registering SYSCTLs for snd.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=25
linker_file_unload: lf->refs=22
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_ad1816.ko
linker_file_sysuninit: SYSUNINITs 0xc1f6e4d0
linker_file_sysuninit: ls_items=0xc1f6e4d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f6e36clinker_file_unregister_sysctls: registering SYSCTLs for snd_ad1816.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=24
linker_file_unload: lf->refs=21
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_als4000.ko
linker_file_sysuninit: SYSUNINITs 0xc1f73610
linker_file_sysuninit: ls_items=0xc1f73614
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f7346clinker_file_unregister_sysctls: registering SYSCTLs for snd_als4000.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=23
linker_file_unload: lf->refs=20
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_cmi.ko
linker_file_sysuninit: SYSUNINITs 0xc1f788d0
linker_file_sysuninit: ls_items=0xc1f788d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f78768linker_file_unregister_sysctls: registering SYSCTLs for snd_cmi.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=22
linker_file_unload: lf->refs=19
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_cs4281.ko
linker_file_sysuninit: SYSUNINITs 0xc1f7fc30
linker_file_sysuninit: ls_items=0xc1f7fc34
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f7faaclinker_file_unregister_sysctls: registering SYSCTLs for snd_cs4281.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=21
linker_file_unload: lf->refs=18
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_csa.ko
linker_file_sysuninit: SYSUNINITs 0xc1f86f38
linker_file_sysuninit: ls_items=0xc1f86f3c
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f86b2clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f86dc8linker_file_unregister_sysctls: registering SYSCTLs for snd_csa.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=20
linker_file_unload: lf->refs=17
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_ds1.ko
linker_file_sysuninit: SYSUNINITs 0xc1f934d0
linker_file_sysuninit: ls_items=0xc1f934d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f9322clinker_file_unregister_sysctls: registering SYSCTLs for snd_ds1.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=19
linker_file_unload: lf->refs=16
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_emu10k1.ko
linker_file_sysuninit: SYSUNINITs 0xc1f9b014
linker_file_sysuninit: ls_items=0xc1f9b018
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f9aaeclinker_file_unregister_sysctls: registering SYSCTLs for snd_emu10k1.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=18
linker_file_unload: lf->refs=15
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_es137x.ko
linker_file_sysuninit: SYSUNINITs 0xc1fa265c
linker_file_sysuninit: ls_items=0xc1fa2660
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fa242clinker_file_unregister_sysctls: registering SYSCTLs for snd_es137x.ko
linker_file_unregister_sysctls: SYSCTLs 0xc1fa2640
linker_file_unload: lf->refs=17
linker_file_unload: lf->refs=14
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_fm801.ko
linker_file_sysuninit: SYSUNINITs 0xc1fa95b0
linker_file_sysuninit: ls_items=0xc1fa95b4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fa93cclinker_file_unregister_sysctls: registering SYSCTLs for snd_fm801.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=16
linker_file_unload: lf->refs=13
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_ich.ko
linker_file_sysuninit: SYSUNINITs 0xc1fb0c10
linker_file_sysuninit: ls_items=0xc1fb0c14
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fb0acclinker_file_unregister_sysctls: registering SYSCTLs for snd_ich.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=15
linker_file_unload: lf->refs=12
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_maestro.ko
linker_file_sysuninit: SYSUNINITs 0xc1fb74b0
linker_file_sysuninit: ls_items=0xc1fb74b4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fb732clinker_file_unregister_sysctls: registering SYSCTLs for snd_maestro.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=14
linker_file_unload: lf->refs=11
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_maestro3.ko
linker_file_sysuninit: SYSUNINITs 0xc1fc2a50
linker_file_sysuninit: ls_items=0xc1fc2a54
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fc2810linker_file_unregister_sysctls: registering SYSCTLs for snd_maestro3.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=13
linker_file_unload: lf->refs=10
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
pcm0: detached
linker_file_sysuninit: calling SYSUNINITs for snd_mss.ko
linker_file_sysuninit: SYSUNINITs 0xc1fcd660
linker_file_sysuninit: ls_items=0xc1fcd664
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fcce0clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fcd548linker_file_unregister_sysctls: registering SYSCTLs for snd_mss.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=12
linker_file_unload: lf->refs=9
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_neomagic.ko
linker_file_sysuninit: SYSUNINITs 0xc1fe9af0
linker_file_sysuninit: ls_items=0xc1fe9af4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1fe994clinker_file_unregister_sysctls: registering SYSCTLs for snd_neomagic.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=11
linker_file_unload: lf->refs=8
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_solo.ko
linker_file_sysuninit: SYSUNINITs 0xc1feec10
linker_file_sysuninit: ls_items=0xc1feec14
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1feea88linker_file_unregister_sysctls: registering SYSCTLs for snd_solo.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=10
linker_file_unload: lf->refs=7
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_t4dwave.ko
linker_file_sysuninit: SYSUNINITs 0xc1ff4c10
linker_file_sysuninit: ls_items=0xc1ff4c14
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1ff4a30linker_file_unregister_sysctls: registering SYSCTLs for snd_t4dwave.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=9
linker_file_unload: lf->refs=6
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_via82c686.ko
linker_file_sysuninit: SYSUNINITs 0xc1ff9fd0
linker_file_sysuninit: ls_items=0xc1ff9fd4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1ff9e90linker_file_unregister_sysctls: registering SYSCTLs for snd_via82c686.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=8
linker_file_unload: lf->refs=5
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_vibes.ko
linker_file_sysuninit: SYSUNINITs 0xc2000ad0
linker_file_sysuninit: ls_items=0xc2000ad4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc2000928linker_file_unregister_sysctls: registering SYSCTLs for snd_vibes.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=7
linker_file_unload: lf->refs=4
linker_file_unload: lf->refs=4
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_sb16.ko
linker_file_sysuninit: SYSUNINITs 0xc200b5d0
linker_file_sysuninit: ls_items=0xc200b5d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc200b44clinker_file_unregister_sysctls: registering SYSCTLs for snd_sb16.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=6
linker_file_unload: lf->refs=3
linker_file_unload: lf->refs=3
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_sb8.ko
linker_file_sysuninit: SYSUNINITs 0xc20121d0
linker_file_sysuninit: ls_items=0xc20121d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc201200clinker_file_unregister_sysctls: registering SYSCTLs for snd_sb8.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=5
linker_file_unload: lf->refs=2
linker_file_unload: lf->refs=2
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_ess.ko
linker_file_sysuninit: SYSUNINITs 0xc2018d3c
linker_file_sysuninit: ls_items=0xc2018d40
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc2018a4clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc2018ca8linker_file_unregister_sysctls: registering SYSCTLs for snd_ess.ko
linker_file_unregister_sysctls: SYSCTLs 0
linker_file_unload: lf->refs=4
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_pcm.ko
linker_file_sysuninit: SYSUNINITs 0xc1f623a0
linker_file_sysuninit: ls_items=0xc1f623a4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60290linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60954linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f609c8linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60a70linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60b8clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60c48linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60d6clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f60e8clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f61bf0linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f61d68linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f61f4clinker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc1f620b0linker_file_sysuninit: callin!
g function 0xc1f5bb8c, address stored at 0xc1f621eclinker_file_sysuninit: calling function 0xc1f59b40, address stored at 0xc1f60e18linker_file_sysuninit: calling function 0xc1f5be20, address stored at 0xc1f62024linker_file_sysuninit: calling function 0xc015e6b0, address stored at 0xc1f61dc4linker_file_sysuninit: calling function 0xc015e6b0, address stored at 0xc1f60ee4linker_file_sysuninit: calling function 0xc015e6b0, address stored at 0xc1f602e4linker_file_sysuninit: calling function 0xc015e6b0, address stored at 0xc1f61c44linker_file_sysuninit: calling function 0xc015e6b0, address stored at 0xc1f60dc4linker_file_unregister_sysctls: registering SYSCTLs for snd_pcm.ko
linker_file_unregister_sysctls: SYSCTLs 0xc1f622e0
linker_file_unload: lf->refs=3
linker_file_unload: lf->refs=1
linker_file_unload: file is unloading, informing modules
linker_file_sysuninit: calling SYSUNINITs for snd_sbc.ko
linker_file_sysuninit: SYSUNINITs 0xc20054d0
linker_file_sysuninit: ls_items=0xc20054d4
linker_file_sysuninit: calling function 0xc1f5bb8c, address stored at 0xc200530c
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc1f5bb8c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc1f5bb8c
stack pointer = 0x10:0xdb085ebc
frame pointer = 0x10:0xdb085ed0
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 = 13 (kldunload)
interrupt mask = none
trap number = 12
panic: page fault
syncing disks...
done
Uptime: 2m1s
dumping to dev #ad/0x20011, offset 1048704
dump ata1: resetting devices .. ad2: invalidating queued requests
done
511 510 509 508 507 506 505 504 503 502 501 500 499 498 497 496 495 494 493 492 491 490 489 488 487 486 485 484 483 482 481 480 479 478 477 476 ~475 474 473 472 471 470 469 468 467 466 465 [CTRL-C to abort] 464 463 462 461 460 459 458 457 456 455 454 453 ~452 451 450 449 448
Stopped at siointr1+0x106: movl $0,brk_state2.766
db> examine 0xc200530c
sdf_31_sys_uninit+0x8: c1f5bb8c
db> examine 0xc1f5bb8c
0xc1f5bb8c:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc1f5bb8c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc02493b4
stack pointer = 0x10:0xdb085ad4
frame pointer = 0x10:0xdb085ad8
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 = 13 (kldunload)
interrupt mask = net tty bio cam
kernel: type 12 trap, code=0
db>
Now gdb backtrace of crashdump comes:
Script started on Wed Jul 14 23:27:20 2004
GNU gdb 4.18 (FreeBSD)
Copyright 1998 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-unknown-freebsd"...Deprecated bfd_read called at /usr/local/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 2627 in elfstab_build_psymtabs
Deprecated bfd_read called at /usr/local/src/gnu/usr.bin/binutils/gdb/../../../../contrib/gdb/gdb/dbxread.c line 933 in fill_symbuf
IdlePTD at physical address 0x00389000
initial pcb at physical address 0x002eaae0
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc1f58b8c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc1f58b8c
stack pointer = 0x10:0xdb085ebc
frame pointer = 0x10:0xdb085ed0
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 = 12 (kldunload)
interrupt mask = none
trap number = 12
panic: page fault
syncing disks...
done
Uptime: 27s
dumping to dev #ad/0x20011, offset 1048704
dump ata1: resetting devices .. ad2: invalidating queued requests
done
511 510 509 508 507 506 505 504 503 502 501 500 499 498 497 496 495 494 493 492 491 490 489 488 487 486 485 484 483 482 481 480 479 478 477 476 475 474 473 472 471 470 469 468 467 466 465 464 463 462 461 460 459 458 457 456 455 454 453 452 451 450 449 448 447 446 445 444 443 442 441 440 439 438 437 436 435 434 433 432 431 430 429 428 427 426 425 424 423 422 421 420 419 418 417 416 415 414 413 412 411 410 409 408 407 406 405 404 403 402 401 400 399 398 397 396 395 394 393 392 391 390 389 388 387 386 385 384 383 382 381 380 379 378 377 376 375 374 373 372 371 370 369 368 367 366 365 364 363 362 361 360 359 358 357 356 355 354 353 352 351 350 349 348 347 346 345 344 343 342 341 340 339 338 337 336 335 334 333 332 331 330 329 328 327 326 325 324 323 322 321 320 319 318 317 316 315 314 313 312 311 310 309 308 307 306 305 304 303 302 301 300 299 298 297 296 295 294 293 292 291 290 289 288 287 286 285 284 283 282 281 280 279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 2!
64 263 262 261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246 245 244 243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 227 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 \^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@!
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^@\^@\^@
\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@\^@
---
#0 dumpsys () at /usr/local/src/sys/kern/kern_shutdown.c:546
546 if (dumping++) {
(kgdb) bt
#0 dumpsys () at /usr/local/src/sys/kern/kern_shutdown.c:546
#1 0xc0162c0c in boot (howto=256)
at /usr/local/src/sys/kern/kern_shutdown.c:367
#2 0xc0163059 in panic (fmt=0xc02b588c "%s")
at /usr/local/src/sys/kern/kern_shutdown.c:654
#3 0xc0256fe8 in trap_fatal (frame=0xdb085e7c, eva=3254094732)
at /usr/local/src/sys/i386/i386/trap.c:974
#4 0xc0256c7d in trap_pfault (frame=0xdb085e7c, usermode=0, eva=3254094732)
at /usr/local/src/sys/i386/i386/trap.c:867
#5 0xc025680f in trap (frame={tf_fs = -620232688, tf_es = -1072365552,
tf_ds = -620232688, tf_edi = -1040173872, tf_esi = -1040173868,
tf_ebp = -620208432, tf_isp = -620208472, tf_ebx = -1040527104,
tf_edx = -1040174432, tf_ecx = 32, tf_eax = -1040872564, tf_trapno = 12,
tf_err = 0, tf_eip = -1040872564, tf_cs = 8, tf_eflags = 66194,
tf_esp = -1072358589, tf_ss = -1040174432})
at /usr/local/src/sys/i386/i386/trap.c:466
#6 0xc1f58b8c in ?? ()
#7 0xc01520ec in linker_file_unload (file=0xc1fad100)
at /usr/local/src/sys/kern/kern_linker.c:437
#8 0xc0152144 in linker_file_unload (file=0xc200be00)
at /usr/local/src/sys/kern/kern_linker.c:445
#9 0xc0152144 in linker_file_unload (file=0xc1f42b00)
at /usr/local/src/sys/kern/kern_linker.c:445
#10 0xc0152745 in kldunload (p=0xd4787dc0, uap=0xdb085f80)
---Type <return> to continue, or q <return> to quit---
at /usr/local/src/sys/kern/kern_linker.c:716
#11 0xc0257259 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
tf_edi = 2, tf_esi = -1077936690, tf_ebp = -1077936960,
tf_isp = -620208172, tf_ebx = 0, tf_edx = 0, tf_ecx = 0, tf_eax = 305,
tf_trapno = 12, tf_err = 2, tf_eip = 134514416, tf_cs = 31,
tf_eflags = 643, tf_esp = -1077938060, tf_ss = 47})
at /usr/local/src/sys/i386/i386/trap.c:1175
#12 0xc024a1c5 in Xint0x80_syscall ()
#13 0x804813e in ?? ()
(kgdb) quit
Script done on Wed Jul 14 23:27:31 2004
>Fix:
Unknown for me.
The panic is so easy to reproduce that I hope that a kernel guru
will find the solution.
Eugene Grosbein
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200407141548.i6EFmeb7000623>