Hi I have attached a debug session I hope someone finds useful in tracking the problem. I have noticed intermittent panics for about a month which may or may not be related, but the panics seem to occur while downloading (and or uploading). My sources are from 30MAR2007. Please let me know if I can provide further information. -- Regards Peter As always the organisation disavows knowledge of this email Script started on Sun Apr 1 12:38:04 2007 baron# exitkgdb -c /var/crash/vmcore.159 -f /boot/kernel/kernel [GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] 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 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-marcel-freebsd". Unread portion of the kernel message buffer: Slab at 0xc456bfa8, freei 7 = 0. panic: Duplicate free of item 0xc456b700 from zone 0xc1462b40(mbuf_packet) cpuid = 0 Uptime: 2h51m45s Physical memory: 1011 MB Dumping 167 MB: 152 136 120 104 88 72 56 40 24 8 #0 doadump () at pcpu.h:172 172 pcpu.h: No such file or directory. in pcpu.h (kgdb) where #0 doadump () at pcpu.h:172 #1 0xc0787a5a in boot (howto=260) at /mnt/cvs/FreeBSD/usr/src/sys/kern/kern_shutdown.c:409 #2 0xc0787e21 in panic (fmt=0xc0aa836d "Duplicate free of item %p from zone %p(%s)\n") at /mnt/cvs/FreeBSD/usr/src/sys/kern/kern_shutdown.c:563 #3 0xc093aaab in uma_dbg_free (zone=0xc1462b40, slab=0xc456bfa8, item=0xc456b700) at /mnt/cvs/FreeBSD/usr/src/sys/vm/uma_dbg.c:302 #4 0xc0938bea in uma_zfree_arg (zone=0xc1462b40, item=0xc456b700, udata=0x0) at /mnt/cvs/FreeBSD/usr/src/sys/vm/uma_core.c:2261 #5 0xc07dac88 in mb_free_ext (m=0xc456b700) at uma.h:305 #6 0xc07daab0 in m_freem (mb=0x0) at mbuf.h:447 #7 0xc46849f8 in ?? () #8 0xc456b700 in ?? () #9 0x00000000 in ?? () #10 0xe2981c54 in ?? () #11 0xc4033000 in ?? () #12 0x460f1757 in ?? () #13 0xe2981c54 in ?? () #14 0xc4684c1f in ?? () #15 0xc4033000 in ?? () #16 0xc51ca410 in ?? () #17 0xffffffff in ?? () #18 0xc4691848 in ?? () #19 0x00000016 in ?? () #20 0xe2981c70 in ?? () #21 0xc466aabf in ?? () #22 0xc4691ce4 in ?? () #23 0x00000000 in ?? () #24 0xc468ee5c in ?? () #25 0x000003e5 in ?? () #26 0x00000000 in ?? () #27 0xe2981cb0 in ?? () #28 0xc0798a66 in softclock (dummy=0xc4033000) at /mnt/cvs/FreeBSD/usr/src/sys/kern/kern_timeout.c:273 Previous frame inner to this frame (corrupt stack?) (kgdb) up 3 #3 0xc093aaab in uma_dbg_free (zone=0xc1462b40, slab=0xc456bfa8, item=0xc456b700) at /mnt/cvs/FreeBSD/usr/src/sys/vm/uma_dbg.c:302 /mnt/cvs/FreeBSD/usr/src/sys/vm/uma_dbg.c:302:7275:beg:0xc093aaab (kgdb) l 297 slabref->us_freelist[freei].us_item = 0; 298 } else { 299 if (slab->us_freelist[freei].us_item != 255) { 300 printf("Slab at %p, freei %d = %d.\n", 301 slab, freei, slab->us_freelist[freei].us_item); 302 panic("Duplicate free of item %p from zone %p(%s)\n", 303 item, zone, zone->uz_name); 304 } 305 306 /* (kgdb) p *zone $1 = {uz_name = 0xc0a88782 "mbuf_packet", uz_lock = 0xc1474e88, uz_keg = 0xc1474e80, uz_link = { le_next = 0x0, le_prev = 0xc146278c}, uz_full_bucket = {lh_first = 0x0}, uz_free_bucket = { lh_first = 0x0}, uz_ctor = 0xc077b090 <mb_ctor_pack>, uz_dtor = 0xc077acf0 <mb_dtor_pack>, uz_init = 0xc077afc0 <mb_zinit_pack>, uz_fini = 0xc077b030 <mb_zfini_pack>, uz_allocs = 1151793, uz_frees = 1151409, uz_fails = 0, uz_fills = 0, uz_count = 128, uz_cpu = {{ uc_freebucket = 0xc5071c48, uc_allocbucket = 0xc145a624, uc_allocs = 281595, uc_frees = 281587}}} (kgdb) p slab $2 = 0xc456bfa8 (kgdb) p slab[4h*[4l $3 = {us_head = {us_keg = 0xc1474e80, us_type = {_us_link = {le_next = 0xc4606fa8, le_prev = 0xc1474eb0}, _us_size = 3294654376}, us_hlink = {sle_next = 0x0}, us_data = 0xc456b000 "", us_flags = 2 '\002', us_freecount = 1 '\001', us_firstfree = 8 '\b'}, us_freelist = {{us_item = 255 'ÿ'}}} (kgdb) p *slab freei $4 = 7 (kgdb) p freei *slab slab-> p item $5 = (void *) 0xc456b700 (kgdb) p item[4h*[4l Attempt to dereference a generic pointer. (kgdb) exit quit baron# exit exit Script done on Sun Apr 1 12:40:45 2007 # # GENERIC -- Generic kernel configuration file for FreeBSD/i386 # # For more information on this file, please read the handbook section on # Kernel Configuration Files: # # http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html # # The handbook is also available locally in /usr/share/doc/handbook # if you've installed the doc distribution, otherwise always see the # FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the # latest information. # # An exhaustive list of options and more detailed explanations of the # device lines is also present in the ../../conf/NOTES and NOTES files. # If you are in doubt as to the purpose or necessity of a line, check first # in NOTES. # # $FreeBSD: src/sys/i386/conf/GENERIC,v 1.459 2006/10/26 22:11:35 jb Exp $ cpu I686_CPU ident BARON # To statically compile in device wiring instead of /boot/device.hints #hints "GENERIC.hints" # Default places to look for devices. makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols #options SCHED_4BSD # 4BSD scheduler options SCHED_ULE # ULE scheduler options PREEMPTION # Enable kernel thread preemption options INET # InterNETworking options INET6 # IPv6 communications protocols options FFS # Berkeley Fast Filesystem options SOFTUPDATES # Enable FFS soft updates support options UFS_ACL # Support for access control lists options UFS_DIRHASH # Improve performance on big directories options MD_ROOT # MD is a potential root device options NFSCLIENT # Network Filesystem Client options NFSSERVER # Network Filesystem Server options NFS_ROOT # NFS usable as /, requires NFSCLIENT options MSDOSFS # MSDOS Filesystem options CD9660 # ISO 9660 Filesystem options PROCFS # Process filesystem (requires PSEUDOFS) options PSEUDOFS # Pseudo-filesystem framework options GEOM_PART_GPT # GUID Partition Tables. options GEOM_LABEL # Provides labelization options COMPAT_43TTY # BSD 4.3 TTY compat [KEEP THIS!] options COMPAT_FREEBSD4 # Compatible with FreeBSD4 options COMPAT_FREEBSD5 # Compatible with FreeBSD5 options COMPAT_FREEBSD6 # Compatible with FreeBSD6 options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI options KTRACE # ktrace(1) support options SYSVSHM # SYSV-style shared memory options SYSVMSG # SYSV-style message queues options SYSVSEM # SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions options KBD_INSTALL_CDEV # install a CDEV entry in /dev options ADAPTIVE_GIANT # Giant mutex is adaptive. options STOP_NMI # Stop CPUS using NMI instead of IPI # Debugging for use in -current options KDB # Enable kernel debugger support. options DDB # Support DDB. options GDB # Support remote GDB. options INVARIANTS # Enable calls of extra sanity checking options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS options WITNESS # Enable checks to detect deadlocks and cycles options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed # To make an SMP kernel, the next two lines are needed options SMP # Symmetric MultiProcessor Kernel device apic # I/O APIC # Bus support. device eisa device pci # Floppy drives device fdc # ATA and ATAPI devices device ata device atadisk # ATA disk drives device ataraid # ATA RAID drives device atapicd # ATAPI CDROM drives device atapifd # ATAPI floppy drives device atapist # ATAPI tape drives options ATA_STATIC_ID # Static device numbering # SCSI Controllers device ahb # EISA AHA1742 family device ahc # AHA2940 and onboard AIC7xxx devices options AHC_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~128k to driver. device ahd # AHA39320/29320 and onboard AIC79xx devices options AHD_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~215k to driver. device amd # AMD 53C974 (Tekram DC-390(T)) device isp # Qlogic family #device ispfw # Firmware for QLogic HBAs- normally a module device mpt # LSI-Logic MPT-Fusion #device ncr # NCR/Symbios Logic device sym # NCR/Symbios Logic (newer chipsets + those of `ncr') device trm # Tekram DC395U/UW/F DC315U adapters device adv # Advansys SCSI adapters device adw # Advansys wide SCSI adapters device aha # Adaptec 154x SCSI adapters device aic # Adaptec 15[012]x SCSI adapters, AIC-6[23]60. device bt # Buslogic/Mylex MultiMaster SCSI adapters device ncv # NCR 53C500 device nsp # Workbit Ninja SCSI-3 device stg # TMC 18C30/18C50 # SCSI peripherals device scbus # SCSI bus (required for SCSI) device ch # SCSI media changers device da # Direct Access (disks) device sa # Sequential Access (tape etc) device cd # CD device pass # Passthrough device (direct SCSI access) device ses # SCSI Environmental Services (and SAF-TE) # RAID controllers interfaced to the SCSI subsystem device amr # AMI MegaRAID device arcmsr # Areca SATA II RAID device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID device ciss # Compaq Smart RAID 5* device dpt # DPT Smartcache III, IV - See NOTES for options device hptmv # Highpoint RocketRAID 182x device rr232x # Highpoint RocketRAID 232x device iir # Intel Integrated RAID device ips # IBM (Adaptec) ServeRAID device mly # Mylex AcceleRAID/eXtremeRAID device twa # 3ware 9000 series PATA/SATA RAID # RAID controllers device aac # Adaptec FSA RAID device aacp # SCSI passthrough for aac (requires CAM) device ida # Compaq Smart RAID device mfi # LSI MegaRAID SAS device mlx # Mylex DAC960 family device pst # Promise Supertrak SX6000 device twe # 3ware ATA RAID # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc # AT keyboard controller device atkbd # AT keyboard device psm # PS/2 mouse device kbdmux # keyboard multiplexer device vga # VGA video card driver device splash # Splash screen and screen saver support # syscons is the default console driver, resembling an SCO console device sc device agp # support several AGP chipsets # Power management support (see NOTES for more options) #device apm # Add suspend/resume support for the i8254. device pmtimer # PCCARD (PCMCIA) support # PCMCIA and cardbus bridge support device cbb # cardbus (yenta) bridge device pccard # PC Card (16-bit) bus device cardbus # CardBus (32-bit) bus # Serial (COM) ports device sio # 8250, 16[45]50 based serial ports device uart # Generic UART driver # Parallel port device ppc device ppbus # Parallel port bus (required) device lpt # Printer device plip # TCP/IP over parallel device ppi # Parallel port interface device #device vpo # Requires scbus and da # If you've got a "dumb" serial or parallel PCI card that is # supported by the puc(4) glue driver, uncomment the following # line to enable it (connects to sio, uart and/or ppc drivers): #device puc # PCI Ethernet NICs. device de # DEC/Intel DC21x4x (``Tulip'') device em # Intel PRO/1000 adapter Gigabit Ethernet Card device ixgb # Intel PRO/10GbE Ethernet Card device le # AMD Am7900 LANCE and Am79C9xx PCnet device txp # 3Com 3cR990 (``Typhoon'') device vx # 3Com 3c590, 3c595 (``Vortex'') # PCI Ethernet NICs that use the common MII bus controller code. # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs! device miibus # MII bus support device bce # Broadcom BCM5706/BCM5708 Gigabit Ethernet device bfe # Broadcom BCM440x 10/100 Ethernet device bge # Broadcom BCM570xx Gigabit Ethernet device dc # DEC/Intel 21143 and various workalikes device fxp # Intel EtherExpress PRO/100B (82557, 82558) device lge # Level 1 LXT1001 gigabit Ethernet device nge # NatSemi DP83820 gigabit Ethernet device nve # nVidia nForce MCP on-board Ethernet Networking device pcn # AMD Am79C97x PCI 10/100 (precedence over 'le') device re # RealTek 8139C+/8169/8169S/8110S device rl # RealTek 8129/8139 device sf # Adaptec AIC-6915 (``Starfire'') device sis # Silicon Integrated Systems SiS 900/SiS 7016 device sk # SysKonnect SK-984x & SK-982x gigabit Ethernet device ste # Sundance ST201 (D-Link DFE-550TX) device stge # Sundance/Tamarack TC9021 gigabit Ethernet device ti # Alteon Networks Tigon I/II gigabit Ethernet device tl # Texas Instruments ThunderLAN device tx # SMC EtherPower II (83c170 ``EPIC'') device vge # VIA VT612x gigabit Ethernet device vr # VIA Rhine, Rhine II device wb # Winbond W89C840F device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'') # ISA Ethernet NICs. pccard NICs included. device cs # Crystal Semiconductor CS89x0 NIC # 'device ed' requires 'device miibus' device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards device ex # Intel EtherExpress Pro/10 and Pro/10+ device ep # Etherlink III based cards device fe # Fujitsu MB8696x based cards device ie # EtherExpress 8/16, 3C507, StarLAN 10 etc. device sn # SMC's 9000 series of Ethernet chips device xe # Xircom pccard Ethernet # Wireless NIC cards device wlan # 802.11 support device wlan_wep # 802.11 WEP support device wlan_ccmp # 802.11 CCMP support device wlan_tkip # 802.11 TKIP support device an # Aironet 4500/4800 802.11 wireless NICs. device ath # Atheros pci/cardbus NIC's device ath_hal # Atheros HAL (Hardware Access Layer) device ath_rate_sample # SampleRate tx rate control for ath device awi # BayStack 660 and others device ral # Ralink Technology RT2500 wireless NICs. device wi # WaveLAN/Intersil/Symbol 802.11 wireless NICs. #device wl # Older non 802.11 Wavelan wireless NIC. # Pseudo devices. device loop # Network loopback device random # Entropy device device ether # Ethernet support device sl # Kernel SLIP device ppp # Kernel PPP device tun # Packet tunnel. device pty # Pseudo-ttys (telnet etc) device md # Memory "disks" device gif # IPv6 and IPv4 tunneling device faith # IPv6-to-IPv4 relaying (translation) device firmware # firmware assist module # The `bpf' device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! # Note that 'bpf' is required for DHCP. device bpf # Berkeley packet filter # USB support device uhci # UHCI PCI->USB interface device ohci # OHCI PCI->USB interface device ehci # EHCI PCI->USB interface (USB 2.0) device usb # USB Bus (required) #device udbp # USB Double Bulk Pipe devices device ugen # Generic device uhid # "Human Interface Devices" device ukbd # Keyboard device ulpt # Printer device umass # Disks/Mass storage - Requires scbus and da device ums # Mouse device ural # Ralink Technology RT2500USB wireless NICs device urio # Diamond Rio 500 MP3 player device uscanner # Scanners # USB Ethernet, requires miibus device aue # ADMtek USB Ethernet device axe # ASIX Electronics USB Ethernet device cdce # Generic USB over Ethernet device cue # CATC USB Ethernet device kue # Kawasaki LSI USB Ethernet device rue # RealTek RTL8150 USB Ethernet # FireWire support device firewire # FireWire bus code device sbp # SCSI over FireWire (Requires scbus and da) device fwe # Ethernet over FireWire (non-standard!) # BARON device sound device snd_emu10kx options P1003_1B_MQUEUE options ALTQ options ALTQ_CBQ options ALTQ_RED options ALTQ_RIO options ALTQ_HFSC options ALTQ_CDNR options ALTQ_PRIQ options ALTQ_NOPCC options ALTQ_DEBUG # options DEBUG # # Options to enable ATAPI devices to be accessed through SCSI subsystem # device atapicam device ata device scbus device cd device pass device iicbus device iicbb # # Hardware performance monitoring counter support. # options HWPMC_HOOKS device hwpmcReceived on Sun Apr 01 2007 - 01:36:08 UTC
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