here is a kernel panic report :
Sun Aug 21 17:58:37 2011
panic(cpu 0 caller 0xffffff80002c268d): Kernel trap at 0xffffff7f80f17fb0, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000000, CR3: 0x0000000000100000, CR4: 0x00000000000206e0
RAX: 0xffffff806b5c7004, RBX: 0xffffff8000000000, RCX: 0x0000000000000000, RDX: 0xffffff80000000e0
RSP: 0xffffff808102bce0, RBP: 0xffffff808102bd10, RSI: 0xffffff8000000000, RDI: 0xffffff806b5c2004
R8: 0x0000000000000001, R9: 0x00000000080ededa, R10: 0x8000000000100000, R11: 0xffffff80002d8200
R12: 0xffffff806b5c2004, R13: 0x0000000000000000, R14: 0xffffff806b5c2004, R15: 0x0000000000000000
RFL: 0x0000000000010282, RIP: 0xffffff7f80f17fb0, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0x0000000000000000, Error code: 0x0000000000000002, Faulting CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff808102b9a0 : 0xffffff8000220702
0xffffff808102ba20 : 0xffffff80002c268d
0xffffff808102bbc0 : 0xffffff80002d7a3d
0xffffff808102bbe0 : 0xffffff7f80f17fb0
0xffffff808102bd10 : 0xffffff7f80f46559
0xffffff808102bd50 : 0xffffff7f80f189f1
0xffffff808102be80 : 0xffffff7f80f1112d
0xffffff808102bec0 : 0xffffff7f80ed1936
0xffffff808102bef0 : 0xffffff8000639626
0xffffff808102bf30 : 0xffffff80006383a0
0xffffff808102bf70 : 0xffffff8000638244
0xffffff808102bfb0 : 0xffffff8000820057
Kernel Extensions in backtrace:
com.apple.driver.AirPort.Atheros40(500.55.5)[01000ACB-C064-3F42-820F-BDE2008267 25]@0xffffff7f80eb2000->0xffffff7f80ff1fff
dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffff ff7f80861000
dependency: com.apple.iokit.IO80211Family(400.40)[78A58272-2170-3068-9C63-88301C99C406]@0xf fffff7f80e7a000
dependency: com.apple.iokit.IONetworkingFamily(2.0)[59A00F6B-3710-3E07-9921-70C45782FF8C]@0 xffffff7f8095c000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
11B26
Kernel version:
Darwin Kernel Version 11.1.0: Tue Jul 26 16:07:11 PDT 2011; root:xnu-1699.22.81~1/RELEASE_X86_64
Kernel UUID: D52AAB80-B2BC-3C6E-BBEA-78BD28064998
System model name: iMac11,3 (Mac-F2238BAE)
System uptime in nanoseconds: 417226677270
last loaded kext at 36915772955: com.apple.driver.AppleBluetoothHIDKeyboard 152.3 (addr 0xffffff7f81bfb000, size 12288)
last unloaded kext at 201891908697: com.apple.driver.AppleUSBUHCI 4.4.0 (addr 0xffffff7f80a7b000, size 65536)
loaded kexts:
com.apple.driver.AppleHWSensor 1.9.4d0
com.apple.driver.AppleBluetoothMultitouch 66.3
com.apple.filesystems.autofs 3.0
com.apple.driver.AGPM 100.12.40
com.apple.driver.AppleMikeyHIDDriver 122
com.apple.driver.AppleUpstreamUserClient 3.5.9
com.apple.driver.AppleMCCSControl 1.0.24
com.apple.driver.AppleHDA 2.1.1f12
com.apple.kext.ATIFramebuffer 7.0.4
com.apple.driver.AppleMikeyDriver 2.1.1f12
com.apple.driver.AudioAUUC 1.59
com.apple.ATIRadeonX3000 7.0.4
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.2.0
com.apple.driver.AirPort.Atheros40 500.55.5
com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0b2
com.apple.driver.AppleLPC 1.5.1
com.apple.driver.AppleBacklight 170.1.9
com.apple.driver.AppleIRController 309
com.apple.driver.AppleUSBCardReader 3.0.0
com.apple.iokit.SCSITaskUserClient 3.0.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 32
com.apple.driver.AppleFWOHCI 4.8.6
com.apple.iokit.IOAHCIBlockStorage 2.0.0
com.apple.iokit.AppleBCM5701Ethernet 3.0.6b9
com.apple.driver.AppleUSBHub 4.4.0
com.apple.driver.AppleEFINVRAM 1.5.0
com.apple.driver.AppleAHCIPort 2.1.8
com.apple.driver.AppleACPIButtons 1.4
com.apple.driver.AppleUSBEHCI 4.4.0
com.apple.driver.AppleRTC 1.4
com.apple.driver.AppleHPET 1.6
com.apple.driver.AppleSMBIOS 1.7
com.apple.driver.AppleACPIEC 1.4
com.apple.driver.AppleAPIC 1.5
com.apple.driver.AppleIntelCPUPowerManagementClient 166.0.0
com.apple.nke.applicationfirewall 3.0.30
com.apple.security.quarantine 1
com.apple.driver.AppleIntelCPUPowerManagement 166.0.0
com.apple.driver.AppleBluetoothHIDKeyboard 152.3
com.apple.driver.AppleHIDKeyboard 152.3
com.apple.driver.AppleMultitouchDriver 220.62
com.apple.driver.IOBluetoothHIDDriver 2.5f17
com.apple.kext.triggers 1.0
com.apple.iokit.IOBluetoothSerialManager 2.5f17
com.apple.iokit.IOSerialFamily 10.0.5
com.apple.driver.DspFuncLib 2.1.1f12
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.kext.ATI5000Controller 7.0.4
com.apple.kext.ATISupport 7.0.4
com.apple.iokit.IOSurface 80.0
com.apple.iokit.IOFireWireIP 2.2.3
com.apple.iokit.IOAudioFamily 1.8.3fc11
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 2.1.1f12
com.apple.iokit.IOHDAFamily 2.1.1f12
com.apple.iokit.IO80211Family 400.40
com.apple.driver.AppleSMC 3.1.1d2
com.apple.driver.IOPlatformPluginFamily 4.7.0b2
com.apple.driver.AppleSMBusPCI 1.0.10d0
com.apple.driver.AppleBacklightExpert 1.0.3
com.apple.iokit.IONDRVSupport 2.3
com.apple.iokit.IOGraphicsFamily 2.3
com.apple.driver.BroadcomUSBBluetoothHCIController 2.5f17
com.apple.driver.AppleUSBBluetoothHCIController 2.5f17
com.apple.iokit.IOBluetoothFamily 2.5f17
com.apple.iokit.IOUSBHIDDriver 4.4.0
com.apple.iokit.IOSCSIBlockCommandsDevice 3.0.0
com.apple.iokit.IOUSBMassStorageClass 3.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.0.0
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.7
com.apple.driver.AppleUSBMergeNub 4.4.0
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.driver.XsanFilter 403
com.apple.iokit.IOFireWireFamily 4.4.3
com.apple.iokit.IOAHCISerialATAPI 2.0.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.0.0
com.apple.iokit.IOEthernetAVBController 1.0.0d5
com.apple.iokit.IONetworkingFamily 2.0
com.apple.iokit.IOUSBUserClient 4.4.0
com.apple.iokit.IOAHCIFamily 2.0.6
com.apple.driver.AppleEFIRuntime 1.5.0
com.apple.iokit.IOHIDFamily 1.7.0
com.apple.iokit.IOUSBFamily 4.4.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 165
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.DiskImages 326
com.apple.iokit.IOStorageFamily 1.7
com.apple.driver.AppleKeyStore 28.18
com.apple.driver.AppleACPIPlatform 1.4
com.apple.iokit.IOPCIFamily 2.6.5
com.apple.iokit.IOACPIFamily 1.4