The following reply was made to PR kern/32587; it has been noted by GNATS.

From: martin@aprisoft.de
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/32587: kernel assertion in ffs_valloc fails (memory corruption in SMP kernels?)
Date: Sun, 22 Jan 2006 14:05:12 +0100 (CET)

 I also got a pool_get() panic - memory modified on freelist.
 This looks like a generic memory corruption issue. I would have guessed
 hardware, but I'm pretty sure this is not the case here.
 
 Here is a dmesg from the machine running a single processor kernel - I'll
 test if this is more stable. I'll also try an i386 SMP kernel.
 
 
 Martin
 
 
 Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 NetBSD 3.99.15 (GENERIC) #0: Sun Jan  8 12:29:49 CET 2006
 	martin@night-owl.duskware.de:/usr/obj/amd64/sys/arch/amd64/compile/GENERIC
 total memory = 4095 MB
 avail memory = 3943 MB
 mainbus0 (root)
 mainbus0: Intel MP Specification (Version 1.4) (nVIDIA   CK804-2P    )
 cpu0 at mainbus0: apid 0 (boot processor)
 cpu0: AMD Opteron(tm) Processor 248, 2210.30 MHz
 cpu0: features: e7dbfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
 cpu0: features: e7dbfbff<PGE,MCA,CMOV,PAT,PSE36,MPC,NOX,MMXX,MMX>
 cpu0: features: e7dbfbff<FXSR,SSE,SSE2,LONG,3DNOW2,3DNOW>
 cpu0: I-cache 64 KB 64B/line 2-way, D-cache 64 KB 64B/line 2-way
 cpu0: L2 cache 1 MB 64B/line 16-way
 cpu0: ITLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
 cpu0: DTLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
 cpu0: calibrating local timer
 cpu0: apic clock running at 200 MHz
 cpu0: 16 page colors
 cpu1 at mainbus0: apid 1 (application processor)
 cpu1: not started
 mpbios: bus 0 is type PCI   
 mpbios: bus 1 is type PCI   
 mpbios: bus 2 is type PCI   
 mpbios: bus 8 is type PCI   
 mpbios: bus 128 is type PCI   
 mpbios: bus 129 is type ISA   
 ioapic0 at mainbus0 apid 2 (I/O APIC)
 ioapic0: pa 0xfec00000, version 11, 24 pins
 ioapic1 at mainbus0 apid 3 (I/O APIC)
 ioapic1: pa 0xd8000000, version 11, 4 pins
 ioapic2 at mainbus0 apid 4 (I/O APIC)
 ioapic2: pa 0xd8001000, version 11, 4 pins
 pci0 at mainbus0 bus 0: configuration mode 1
 pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
 NVIDIA nForce4 Memory Controller (miscellaneous memory, revision 0xa3) at pci0 dev 0 function 0 not configured
 pcib0 at pci0 dev 1 function 0
 pcib0: NVIDIA nForce4 PCI-ISA bridge (rev. 0xa3)
 NVIDIA nForce4 SMBus (SMBus serial bus, revision 0xa2) at pci0 dev 1 function 1 not configured
 ohci0 at pci0 dev 2 function 0: NVIDIA nForce4 USB Host Controller (rev. 0xa2)
 ohci0: interrupting at ioapic0 pin 10 (irq 10)
 ohci0: OHCI version 1.0, legacy support
 usb0 at ohci0: USB revision 1.0
 uhub0 at usb0
 uhub0: NVIDIA OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
 uhub0: 10 ports with 10 removable, self powered
 ehci0 at pci0 dev 2 function 1: NVIDIA nForce4 USB2 Host Controller (rev. 0xa3)
 ehci0: interrupting at ioapic0 pin 7 (irq 7)
 ehci0: BIOS refuses to give up ownership, using force
 ehci0: EHCI version 1.0
 ehci0: companion controller, 4 ports each: ohci0
 usb1 at ehci0: USB revision 2.0
 uhub1 at usb1
 uhub1: NVIDIA EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
 uhub1: 10 ports with 10 removable, self powered
 auich0 at pci0 dev 4 function 0: nForce4 AC-97 Audio
 auich0: interrupting at ioapic0 pin 12 (irq 12)
 auich0: ac97: Analog Devices AD1981B codec; headphone, 20 bit DAC, no 3D stereo
 auich0: ac97: ext id 605<AC97_22,AMAP,SPDIF,VRA>
 viaide0 at pci0 dev 6 function 0
 viaide0: NVIDIA nForce4 IDE Controller (rev. 0xf2)
 viaide0: bus-master DMA support present
 viaide0: primary channel configured to compatibility mode
 viaide0: primary channel interrupting at ioapic0 pin 14 (irq 14)
 atabus0 at viaide0 channel 0
 viaide0: secondary channel configured to compatibility mode
 viaide0: secondary channel interrupting at ioapic0 pin 15 (irq 15)
 atabus1 at viaide0 channel 1
 viaide1 at pci0 dev 7 function 0
 viaide1: NVIDIA nForce4 Serial ATA Controller (rev. 0xf3)
 viaide1: bus-master DMA support present
 viaide1: primary channel wired to native-PCI mode
 viaide1: using ioapic0 pin 11 (irq 11) for native-PCI interrupt
 atabus2 at viaide1 channel 0
 viaide1: secondary channel wired to native-PCI mode
 atabus3 at viaide1 channel 1
 viaide2 at pci0 dev 8 function 0
 viaide2: NVIDIA nForce4 Serial ATA Controller (rev. 0xf3)
 viaide2: bus-master DMA support present
 viaide2: primary channel wired to native-PCI mode
 viaide2: using ioapic0 pin 10 (irq 10) for native-PCI interrupt
 atabus4 at viaide2 channel 0
 viaide2: secondary channel wired to native-PCI mode
 atabus5 at viaide2 channel 1
 ppb0 at pci0 dev 9 function 0: NVIDIA nForce4 PCI Host Bridge (rev. 0xa2)
 pci1 at ppb0 bus 1
 pci1: i/o space, memory space enabled
 tlp0 at pci1 dev 4 function 0: Macronix MX98713 Ethernet, pass 0.0
 tlp0: interrupting at ioapic0 pin 10 (irq 10)
 tlp0: Ethernet address 00:40:05:50:ee:9b
 tlp0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX
 fwohci0 at pci1 dev 5 function 0: Texas Instruments TSB43AA22/A IEEE 1394 Host Controller (rev. 0x00)
 fwohci0: interrupting at ioapic0 pin 12 (irq 12)
 fwohci0: OHCI version 1.10 (ROM=1)
 fwohci0: No. of Isochronous channels is 4.
 fwohci0: EUI64 00:e0:81:00:00:23:65:95
 fwohci0: Phy 1394a available S400, 2 ports.
 fwohci0: Link S400, max_rec 2048 bytes.
 ieee1394if0 at fwohci0: IEEE1394 bus
 fwip0 at ieee1394if0: IP over IEEE1394
 fwohci0: Initiate bus reset
 NVIDIA nForce4 Ethernet (miscellaneous bridge, revision 0xa3) at pci0 dev 10 function 0 not configured
 ppb1 at pci0 dev 14 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
 pci2 at ppb1 bus 2
 pci2: i/o space, memory space enabled, rd/line, wr/inv ok
 vga0 at pci2 dev 0 function 0: ATI Technologies Radeon X700 Pro (rev. 0x00)
 vga0: WARNING: ignoring 64-bit BAR @ 0x10
 vga0: WARNING: ignoring 64-bit BAR @ 0x18
 wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation)
 wsmux1: connecting to wsdisplay0
 ATI Technologies Radeon X700 Pro Secondary (miscellaneous display) at pci2 dev 0 function 1 not configured
 pchb0 at pci0 dev 24 function 0
 pchb0: Advanced Micro Devices AMD64 HyperTransport configuration (rev. 0x00)
 pchb1 at pci0 dev 24 function 1
 pchb1: Advanced Micro Devices AMD64 Address Map configuration (rev. 0x00)
 pchb2 at pci0 dev 24 function 2
 pchb2: Advanced Micro Devices AMD64 DRAM configuration (rev. 0x00)
 pchb3 at pci0 dev 24 function 3
 pchb3: Advanced Micro Devices AMD64 Miscellaneous configuration (rev. 0x00)
 pchb4 at pci0 dev 25 function 0
 pchb4: Advanced Micro Devices AMD64 HyperTransport configuration (rev. 0x00)
 pchb5 at pci0 dev 25 function 1
 pchb5: Advanced Micro Devices AMD64 Address Map configuration (rev. 0x00)
 pchb6 at pci0 dev 25 function 2
 pchb6: Advanced Micro Devices AMD64 DRAM configuration (rev. 0x00)
 pchb7 at pci0 dev 25 function 3
 pchb7: Advanced Micro Devices AMD64 Miscellaneous configuration (rev. 0x00)
 isa0 at pcib0
 com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
 pckbc0 at isa0 port 0x60-0x64
 pckbd0 at pckbc0 (kbd slot)
 pckbc0: using irq 1 for kbd slot
 wskbd0 at pckbd0: console keyboard, using wsdisplay0
 attimer0 at isa0 port 0x40-0x43: AT Timer
 pcppi0 at isa0 port 0x61
 midi0 at pcppi0: PC speaker
 sysbeep0 at pcppi0
 fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
 pcppi0: attached to attimer0
 pci3 at mainbus0 bus 8
 pci3: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
 ppb2 at pci3 dev 10 function 0: Advanced Micro Devices AMD8131 PCI-X Tunnel (rev. 0x12)
 pci4 at ppb2 bus 9
 pci4: i/o space, memory space enabled
 aapic0 at pci3 dev 10 function 1: Advanced Micro Devices AMD8131 IO Apic (rev. 0x01)
 ppb3 at pci3 dev 11 function 0: Advanced Micro Devices AMD8131 PCI-X Tunnel (rev. 0x12)
 pci5 at ppb3 bus 10
 pci5: i/o space, memory space enabled
 aapic1 at pci3 dev 11 function 1: Advanced Micro Devices AMD8131 IO Apic (rev. 0x01)
 pci6 at mainbus0 bus 128
 pci6: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
 NVIDIA nForce4 Memory Controller (miscellaneous memory, revision 0xa3) at pci6 dev 0 function 0 not configured
 NVIDIA product 0x00d3 (miscellaneous memory, revision 0xa3) at pci6 dev 1 function 0 not configured
 NVIDIA nForce4 Ethernet (miscellaneous bridge, revision 0xa3) at pci6 dev 10 function 0 not configured
 ppb4 at pci6 dev 14 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
 pci7 at ppb4 bus 129
 pci7: i/o space, memory space enabled, rd/line, wr/inv ok
 ioapic0: enabling
 ioapic1: enabling
 ioapic2: enabling
 fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
 ieee1394if0: 1 nodes, maxhop <= 0, Not found IRM capable node
 auich0: measured ac97 link rate at 49461 Hz, will use 48000 Hz
 audio0 at auich0: full duplex, mmap, independent
 Kernelized RAIDframe activated
 atapibus0 at atabus0: 2 targets
 cd0 at atapibus0 drive 1: <LITE-ON DVD SOHD-167T, , 9S19> cdrom removable
 cd0: 32-bit data port
 cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
 cd0(viaide0:0:1): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
 uhidev0 at uhub0 port 2 configuration 1 interface 0
 uhidev0: Microsoft Microsoft IntelliMouse M-BM-. with IntelliEye, rev 1.10/1.00, addr 2, iclass 3/1
 ums0 at uhidev0: 3 buttons and Z dir.
 wsmouse0 at ums0 mux 0
 wd0 at atabus2 drive 0: <WDC WD1600JD-00HBB0>
 wd0: drive supports 16-sector PIO transfers, LBA48 addressing
 wd0: 149 GB, 310101 cyl, 16 head, 63 sec, 512 bytes/sect x 312581808 sectors
 wd0: 32-bit data port
 wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
 wd0(viaide1:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
 wd1 at atabus4 drive 0: <WDC WD740GD-00FLA2>
 wd1: drive supports 16-sector PIO transfers, LBA48 addressing
 wd1: 70911 MB, 144073 cyl, 16 head, 63 sec, 512 bytes/sect x 145226112 sectors
 wd1: 32-bit data port
 wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
 wd1(viaide2:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
 wd2 at atabus5 drive 0: <WDC WD740GD-00FLA2>
 wd2: drive supports 16-sector PIO transfers, LBA48 addressing
 wd2: 70911 MB, 144073 cyl, 16 head, 63 sec, 512 bytes/sect x 145226112 sectors
 wd2: 32-bit data port
 wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
 wd2(viaide2:1:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
 boot device: wd0
 root on wd0a dumps on wd0b
 root file system type: ffs
 wsdisplay0: screen 1 added (80x25, vt100 emulation)
 wsdisplay0: screen 2 added (80x25, vt100 emulation)
 wsdisplay0: screen 3 added (80x25, vt100 emulation)
 wsdisplay0: screen 4 added (80x25, vt100 emulation)