Kernel Panic Help

Hi All,

Does anyone have any advice on what might be cause my 27" 2009 (I think) iMac to be having constant Kernel panics, it seems like it's every 30 mins, but I can't think of anything I'm doing that might be causing it.

Cheers,

Dave

Interval Since Last Panic Report: 23663196 sec Panics Since Last Report: 14 Anonymous UUID: 575B9398-B117-4D3C-B9CB-1B60F6A8604A Sat Nov 24 13:47:25 2012 panic(cpu 4 caller 0x2ceea0): "allocbuf: NULL b_datap"@/SourceCache/xnu/xnu-1504.15.3/bsd/vfs/vfs_bio.c:2661 Backtrace (CPU 4), Frame : Return Address (4 potential args on stack) 0x883d3708 : 0x21b837 (0x5dd7fc 0x883d373c 0x223ce1 0x0) 0x883d3758 : 0x2ceea0 (0x5a1874 0x80c8107c 0x40000 0x3) 0x883d3798 : 0x2cfc00 (0x80c81040 0x40000 0x6737d8 0x6f006f) 0x883d3838 : 0x2cfe8d (0xe584128 0x148df0f2 0x0 0x40000) 0x883d3878 : 0x2cff4a (0x40000 0x130aa68c 0x0 0x10) 0x883d3898 : 0x852e84bb (0xe584128 0x148df0f2 0x0 0x40000) 0x883d3948 : 0x852e5bc5 (0x1f366a04 0x523668 0x0 0x883d39c8) 0x883d39e8 : 0x852e90f7 (0x1f366a04 0x52355e 0x560 0x13bad65c) 0x883d3a78 : 0x2fd320 (0x883d3a98 0x3 0x883d3ac8 0x58a38c) 0x883d3ac8 : 0x2dac58 (0x13bad65c 0x883d3df4 0x883d3f08 0x1331db24) 0x883d3b58 : 0x2dba8a (0x883d3ddc 0x100 0x883d3dfc 0x0) 0x883d3c18 : 0x2eac15 (0x883d3ddc 0x0 0x0 0x0) 0x883d3d88 : 0x2eb058 (0x780670 0x1 0x0 0x0) 0x883d3f48 : 0x2eb0f1 (0x780670 0x1 0x0 0x0) 0x883d3f78 : 0x4f82fb (0xe629540 0x132cd968 0x1331da64 0x0) 0x883d3fc8 : 0x2a251d (0x132cd964 0x0 0x10 0x0) Kernel Extensions in backtrace (with dependencies): com.apple.filesystems.msdosfs(1.6.3)@0x852e3000->0x852effff BSD process name corresponding to current thread: mdworker Mac OS version: 10K549 Kernel version: Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 System model name: iMac11,1 (Mac-F2268DAE) System uptime in nanoseconds: 1830660649469 unloaded kexts: com.apple.driver.AppleUSBUHCI 4.2.0 (addr 0x85e1d000, size 0x65536) - last unloaded 257636672406 loaded kexts: com.parallels.kext.prl_vnic 5.0 9220.531002 com.vmware.kext.vmnet 3.1.2 com.parallels.kext.prl_netbridge 5.0 9220.531002 com.vmware.kext.vmioplug 3.1.2 com.parallels.kext.prl_usb_connect 5.0 9220.531002 com.vmware.kext.vmci 3.1.2 com.parallels.kext.prl_hid_hook 5.0 9220.531002 com.avatron.AVExFramebuffer 1.5.1 com.avatron.AVExVideo 1.5.1 com.vmware.kext.vmx86 3.1.2 com.parallels.kext.prl_hypervisor 5.0 9220.531002 com.google.filesystems.fusefs 2.0.3 at.obdev.nke.LittleSnitch 2.2.05 com.apple.filesystems.msdosfs 1.6.3 - last loaded 77016825952 com.apple.driver.AGPM 100.12.31 com.apple.driver.AppleHWSensor 1.9.3d0 com.apple.driver.AudioAUUC 1.57 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.iokit.CHUDUtils 201 com.apple.driver.AppleUpstreamUserClient 3.5.7 com.apple.iokit.CHUDProf 214 com.apple.driver.AppleMCCSControl 1.0.20 com.apple.driver.AppleMikeyHIDDriver 1.2.0 com.apple.kext.ATIFramebuffer 6.3.6 com.apple.driver.AppleMikeyDriver 2.0.5f14 com.apple.ATIRadeonX2000 6.3.6 com.apple.driver.AudioIPCDriver 1.1.6 com.apple.driver.AppleHDA 2.0.5f14 com.apple.driver.IOBluetoothBNEPDriver 2.4.5f3 com.apple.driver.AirPort.Atheros21 425.14.7 com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0a1 com.apple.driver.AppleLPC 1.5.1 com.apple.driver.AppleBacklight 170.0.46 com.apple.filesystems.autofs 2.1.0 com.apple.driver.AppleBluetoothMultitouch 54.3 com.apple.driver.AppleUSBCardReader 2.6.1 com.apple.driver.AppleIRController 303.8 com.apple.iokit.SCSITaskUserClient 2.6.8 com.apple.BootCache 31.1 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1 com.apple.iokit.IOAHCIBlockStorage 1.6.4 com.apple.driver.AppleFWOHCI 4.7.3 com.apple.driver.AppleUSBHub 4.2.4 com.apple.iokit.AppleBCM5701Ethernet 3.0.5b8 com.apple.driver.AppleEFINVRAM 1.4.0 com.apple.driver.AppleAHCIPort 2.1.7 com.apple.driver.AppleUSBEHCI 4.2.4 com.apple.driver.AppleACPIButtons 1.3.6 com.apple.driver.AppleRTC 1.3.1 com.apple.driver.AppleHPET 1.5 com.apple.driver.AppleSMBIOS 1.7 com.apple.driver.AppleACPIEC 1.3.6 com.apple.driver.AppleAPIC 1.4 com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0 com.apple.security.sandbox 1 com.apple.security.quarantine 0 com.apple.nke.applicationfirewall 2.1.14 com.apple.driver.AppleIntelCPUPowerManagement 142.6.0 com.apple.driver.AppleProfileReadCounterAction 17 com.apple.driver.AppleProfileTimestampAction 10 com.apple.driver.AppleProfileThreadInfoAction 14 com.apple.driver.AppleProfileRegisterStateAction 10 com.apple.driver.AppleProfileKEventAction 10 com.apple.driver.AppleProfileCallstackAction 20 com.apple.iokit.IOSurface 74.2 com.apple.iokit.IOBluetoothSerialManager 2.4.5f3 com.apple.iokit.IOSerialFamily 10.0.3 com.apple.iokit.CHUDKernLib 207 com.apple.driver.DspFuncLib 2.0.5f14 com.apple.iokit.IOAudioFamily 1.8.3fc2 com.apple.kext.OSvKernDSPLib 1.3 com.apple.driver.AppleSMBusController 1.0.10d0 com.apple.kext.ATI4800Controller 6.3.6 com.apple.kext.ATISupport 6.3.6 com.apple.iokit.IOFireWireIP 2.0.3 com.apple.iokit.AppleProfileFamily 41 com.apple.driver.AppleHDAController 2.0.5f14 com.apple.iokit.IOHDAFamily 2.0.5f14 com.apple.iokit.IO80211Family 320.1 com.apple.driver.AppleSMC 3.1.0d5 com.apple.driver.IOPlatformPluginFamily 4.7.0a1 com.apple.driver.AppleSMBusPCI 1.0.10d0 com.apple.driver.AppleBacklightExpert 1.0.1 com.apple.iokit.IONDRVSupport 2.2.1 com.apple.iokit.IOGraphicsFamily 2.2.1 com.apple.driver.IOBluetoothHIDDriver 2.4.5f3 com.apple.driver.AppleMultitouchDriver 207.11 com.apple.driver.AppleUSBHIDKeyboard 141.5 com.apple.driver.AppleHIDKeyboard 141.5 com.apple.driver.BroadcomUSBBluetoothHCIController 2.4.5f3 com.apple.driver.AppleUSBBluetoothHCIController 2.4.5f3 com.apple.iokit.IOBluetoothFamily 2.4.5f3 com.apple.iokit.IOUSBMassStorageClass 2.6.7 com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8 com.apple.iokit.IOUSBHIDDriver 4.2.0 com.apple.driver.AppleUSBMergeNub 4.2.4 com.apple.driver.AppleUSBComposite 3.9.0 com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8 com.apple.iokit.IOBDStorageFamily 1.6 com.apple.iokit.IODVDStorageFamily 1.6 com.apple.iokit.IOCDStorageFamily 1.6.1 com.apple.driver.XsanFilter 402.1 com.apple.iokit.IOAHCISerialATAPI 1.2.6 com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8 com.apple.iokit.IOFireWireFamily 4.2.6 com.apple.iokit.IOUSBUserClient 4.2.4 com.apple.iokit.IONetworkingFamily 1.10 com.apple.iokit.IOAHCIFamily 2.0.6 com.apple.iokit.IOUSBFamily 4.2.4 com.apple.driver.AppleEFIRuntime 1.4.0 com.apple.iokit.IOHIDFamily 1.6.6 com.apple.iokit.IOSMBusFamily 1.1 com.apple.security.TMSafetyNet 6 com.apple.kext.AppleMatch 1.0.0d1 com.apple.driver.DiskImages 289 com.apple.iokit.IOStorageFamily 1.6.3 com.apple.driver.AppleACPIPlatform 1.3.6 com.apple.iokit.IOPCIFamily 2.6.5 com.apple.iokit.IOACPIFamily 1.3.0 Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i7, 2.8 GHz, 8 GB, SMC 1.54f36 Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB Memory Module: global_name AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 2.1.14.6 Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports Network Service: AirPort, AirPort, en1 Serial ATA Device: ST31000528ASQ, 931.51 GB Serial ATA Device: OPTIARC DVD RW AD-5680H USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2 USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1006, 0xfa140000 / 6 USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x0220, 0xfa142000 / 8 USB Device: My Book 1140, 0x1058 (Western Digital Technologies, Inc.), 0x1140, 0xfa130000 / 5 USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4 USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8215, 0xfa111000 / 7 USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa120000 / 3 USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2 USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfd140000 / 5 USB Device: Photosmart Premium C309g-m, 0x03f0 (Hewlett Packard), 0x7d11, 0xfd144000 / 9 USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfd143000 / 8 USB Device: My Book, 0x1058 (Western Digital Technologies, Inc.), 0x1100, 0xfd143200 / 11 USB Device: My Book, 0x1058 (Western Digital Technologies, Inc.), 0x1100, 0xfd143100 / 10 USB Device: My Book, 0x1058 (Western Digital Technologies, Inc.), 0x1100, 0xfd142000 / 7 USB Device: My Book, 0x1058 (Western Digital Technologies, Inc.), 0x1100, 0xfd141000 / 6 USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 4 USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0xfd110000 / 3