OS bug in taskq

Elliot Finley efinleywork at efinley.com
Sat Dec 15 15:13:37 PST 2007


After turning tls/ssl on in Exim and installing dovecot (with pop3s
and imaps) I've been getting a panic:

kernel trap 12 with interrupts disabled

Fatel trap 12: page fault while in kernel mode
cpuid = 2; apic id = 06
fault virtual address = 0x104
fault code            = supervisor read, page not present
instruction pointer   = 0x20:0xc06730cd
stack pointer         = 0x28:0xea1ddc90
frame pointer         = 0x28:0xea1ddc9c
code segment          = base 0x0, limit 0xfffff, type 0x1b
                      = DPL 0, pres 1, def32 1, gran 1
processor eflags      = resume, IOPL = 0
current process       = 5 (thread taskq)

It's always the same. Same cpuid, same pointers, etc...

I have:


in /etc/rc.conf and:

options         KDB
options         DDB                     # debugging kernel

in the kernel and I'm still unable to obtain a crash dump.  Hopefully
there is enough info in this email for a hacker to point me in the
right direction to debug this.


Copyright (c) 1992-2007 The FreeBSD Project.
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FreeBSD 6.2-RELEASE-p5 #1: Mon Nov 19 11:16:44 MST 2007
    root at postmaster.etv.net:/usr/obj/usr/src/sys/DDB-SMP
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2793.20-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf4a  Stepping = 10

  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  Logical CPUs per core: 2
real memory  = 3220963328 (3071 MB)
avail memory = 3150856192 (3004 MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  6
 cpu3 (AP): APIC ID:  7
ioapic0: Changing APIC ID to 8
ioapic1: Changing APIC ID to 9
ioapic1: WARNING: intbase 32 != expected base 24
ioapic2: Changing APIC ID to 10
ioapic2: WARNING: intbase 64 != expected base 56
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ioapic1 <Version 2.0> irqs 32-55 on motherboard
ioapic2 <Version 2.0> irqs 64-87 on motherboard
kbd1 at kbdmux0
ath_hal: (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413,
acpi0: <DELL PE BKC> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 2.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 0.0 on pci1
pci2: <ACPI PCI bus> on pcib2
amr0: <LSILogic MegaRAID 1.53> mem
0xd80f0000-0xd80fffff,0xdfdc0000-0xdfdfffff irq 46 at device 14.0 on
amr0: delete logical drives supported by controller
amr0: <LSILogic PERC 4e/Di> Firmware 522A, BIOS H430, 256MB RAM
pcib3: <ACPI PCI-PCI bridge> at device 0.2 on pci1
pci3: <ACPI PCI bus> on pcib3
pcib4: <ACPI PCI-PCI bridge> at device 4.0 on pci0
pci4: <ACPI PCI bus> on pcib4
pcib5: <ACPI PCI-PCI bridge> at device 5.0 on pci0
pci5: <ACPI PCI bus> on pcib5
pcib6: <ACPI PCI-PCI bridge> at device 0.0 on pci5
pci6: <ACPI PCI bus> on pcib6
em0: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port
0xecc0-0xecff mem 0xdfae0000-0xdfafffff irq 64 at device 7.0 on pci6
em0: Ethernet address: 00:18:8b:34:70:50
pcib7: <ACPI PCI-PCI bridge> at device 0.2 on pci5
pci7: <ACPI PCI bus> on pcib7
em1: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port
0xdcc0-0xdcff mem 0xdf8e0000-0xdf8fffff irq 65 at device 8.0 on pci7
em1: Ethernet address: 00:18:8b:34:70:51
pcib8: <ACPI PCI-PCI bridge> at device 6.0 on pci0
pci8: <ACPI PCI bus> on pcib8
uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xbce0-0xbcff
irq 16 at device 29.0 on pci0
usb0: <Intel 82801EB (ICH5) USB controller USB-A> 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
uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xbcc0-0xbcdf
irq 19 at device 29.1 on pci0
usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xbca0-0xbcbf
irq 18 at device 29.2 on pci0
usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
ehci0: <Intel 82801EB/R (ICH5) USB 2.0 controller> mem
0xdff00000-0xdff003ff irq 23 at device 29.7 on pci0
usb3: EHCI version 1.0
usb3: companion controllers, 2 ports each: usb0 usb1 usb2
usb3: <Intel 82801EB/R (ICH5) USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
uhub4: vendor 0x413c product 0xa001, class 9/0, rev 2.00/0.00, addr 2
uhub4: multiple transaction translators
uhub4: 2 ports with 2 removable, self powered
pcib9: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci9: <ACPI PCI bus> on pcib9
pci9: <unknown> at device 5.0 (no driver attached)
pci9: <unknown> at device 5.1 (no driver attached)
pci9: <unknown> at device 5.2 (no driver attached)
atapci0: <SiI 0680 UDMA133 controller> port
mem 0xdf5fec00-0xdf5fecff irq 23 at device 6.0 on pci9
ata2: <ATA channel 0> on atapci0
ata3: <ATA channel 1> on atapci0
pci9: <display, VGA> at device 13.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <Intel ICH5 UDMA100 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xfc00-0xfc0f at device 31.1 on
ata0: <ATA channel 0> on atapci1
ata1: <ATA channel 1> on atapci1
fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10
on acpi0
sio0: type 16550A
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem
0xc0000-0xcafff,0xcb000-0xcbfff,0xcc000-0xccfff,0xec000-0xeffff on
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on
ukbd0: Dell DRAC4, rev 1.10/0.00, addr 2, iclass 3/1
kbd2 at ukbd0
ums0: Dell DRAC4, rev 1.10/0.00, addr 2, iclass 3/1
ums0: X report 0x0002 not supported
device_attach: ums0 attach returned 6
Timecounters tick every 1.000 msec
acd0: CDROM <TEAC CD-ROM CD-224E-N/3.AB> at ata0-master UDMA33
device_attach: afd0 attach returned 6
acd1: CDROM <VIRTUALCDROM DRIVE/> at ata2-slave PIO3
amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 559600MB (1146060800 sectors) RAID 5 (optimal)
SMP: AP CPU #2 Launched!
SMP: AP CPU #1 Launched!
SMP: AP CPU #3 Launched!
Trying to mount root from ufs:/dev/amrd0s1a
fire_saver: the console does not support M_VGA_CG320
module_register_init: MOD_LOAD (fire_saver, 0xc8d50c10, 0) error 19

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