Q: What is the cause of my kernel panic?

I'm experiencing a repeated kernel panic and I don't know what the problem is. I've troubleshooted nearly all third party kernels, repaired disk permissions multiple times, all my memory is fine. What is the problem?

Here is a kernel panic log.

Sun Nov 24 15:47:44 2013

panic(cpu 3 caller 0x226ec0): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1504.15.3/osfmk/kern/sched_prim.c:1471

Backtrace (CPU 3), Frame : Return Address (4 potential args on stack)

0x88683e18 : 0x21b837 (0x5dd7fc 0x88683e4c 0x223ce1 0x0)

0x88683e68 : 0x226ec0 (0x593ab8 0xffffffff 0x593a50 0x226a81)

0x88683ee8 : 0x2275c6 (0x10e2e7c4 0x0 0xffffffff 0x0)

0x88683f58 : 0x227631 (0x23014c 0x863ea0 0x0 0x2a45c9)

0x88683f78 : 0x2302e6 (0x23014c 0x863ea0 0x0 0x0)

0x88683fc8 : 0x2a179c (0x863ea0 0x0 0x10 0x1a9da724)

 

 

BSD process name corresponding to current thread: kernel_task

 

 

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: MacPro2,1 (Mac-F4208DA9)

 

 

System uptime in nanoseconds: 20427443102547

unloaded kexts:

com.apple.driver.AppleFileSystemDriver          2.0 (addr 0xe9a000, size 0x12288) - last unloaded 80506837428

loaded kexts:

com.Cycling74.driver.Soundflower          1.6.6

com.razer.common.razerhid          7.47

com.apple.driver.AppleHWSensor          1.9.3d0 - last loaded 11339262195

com.apple.filesystems.autofs          2.1.0

com.apple.driver.AppleUpstreamUserClient          3.5.7

com.apple.driver.AppleMCCSControl          1.0.20

com.apple.driver.AppleHDA          2.0.5f14

com.apple.driver.AudioAUUC          1.57

com.apple.GeForce          6.3.7

com.apple.Dont_Steal_Mac_OS_X          7.0.0

com.apple.iokit.CHUDUtils          364

com.apple.iokit.CHUDProf          366

com.apple.driver.AudioIPCDriver          1.1.6

com.apple.driver.AppleMCEDriver          1.1.9

com.apple.driver.AppleIntelMeromProfile          19.1

com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0a1

com.apple.driver.AppleLPC          1.5.1

com.apple.filesystems.ntfs          3.4

com.apple.iokit.SCSITaskUserClient          2.6.8

com.apple.BootCache          31.1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1

com.apple.driver.AppleIntel8254XEthernet          2.1.3b1

com.apple.iokit.IOAHCIBlockStorage          1.6.4

com.apple.driver.AppleUSBHub          4.2.4

com.apple.driver.AppleFWOHCI          4.7.3

com.apple.driver.AppleAHCIPort          2.1.7

com.apple.driver.AppleIntelPIIXATA          2.5.1

com.apple.driver.AppleEFINVRAM          1.4.0

com.apple.driver.AppleUSBEHCI          4.2.4

com.apple.driver.AppleUSBUHCI          4.2.0

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.DspFuncLib          2.0.5f14

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.nvidia.nv50hal          6.3.7

com.apple.NVDAResman          6.3.7

com.apple.iokit.IONDRVSupport          2.2.1

com.apple.iokit.IOFireWireIP          2.0.3

com.apple.driver.AppleUSBAudio          2.7.6f6

com.apple.iokit.IOSurface          74.2

com.apple.iokit.IOBluetoothSerialManager          2.4.5f3

com.apple.iokit.IOSerialFamily          10.0.3

com.apple.iokit.CHUDKernLib          365

com.apple.iokit.IOAudioFamily          1.8.3fc2

com.apple.kext.OSvKernDSPLib          1.3

com.apple.driver.AppleHDAController          2.0.5f14

com.apple.iokit.IOGraphicsFamily          2.2.1

com.apple.iokit.IOHDAFamily          2.0.5f14

com.apple.iokit.AppleProfileFamily          41.4

com.apple.driver.AppleSMC          3.1.0d5

com.apple.driver.IOPlatformPluginFamily          4.7.0a1

com.apple.driver.IOBluetoothHIDDriver          2.4.5f3

com.apple.iokit.IOBluetoothFamily          2.4.5f3

com.apple.iokit.IOUSBHIDDriver          4.2.0

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.IOATAPIProtocolTransport          2.5.1

com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.8

com.apple.iokit.IONetworkingFamily          1.10

com.apple.iokit.IOFireWireFamily          4.2.6

com.apple.iokit.IOUSBUserClient          4.2.4

com.apple.iokit.IOAHCIFamily          2.0.6

com.apple.iokit.IOATAFamily          2.5.1

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.kext.AppleMatch          1.0.0d1

com.apple.security.TMSafetyNet          6

com.apple.driver.DiskImages          289.1

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