Kernel Panic - imac rebooting please help?

Hello

My 2009 iMac continues to reboot due to kernel panic during the past couple of week. It happes several times a day. I cannot find any specific cause and it seems to happen randomly. That is even when the computer is on standby. I hvae searched the web, but cannot find a solution. The problem is getting worse.

I have tried apple hardware test that detected no problems. I have upgraded the imac last yaer with a Samsung SSD and its running 6 gb ram. It has worked flawless until now. Should I consider buying a new Imac?

Here is the log:

Apple fejl

Anonymous UUID: 606A0DFB-CFD6-710F-18D7-F49E14855E2A

Tue May 13 20:49:58 2014

panic(cpu 0 caller 0xffffff8001b63117): "hfs_UNswap_BTNode: invalid backward link (0x00000020 == 0x00000020)\n"@/SourceCache/xnu/xnu-2422.92.1/bsd/hfs/hfs_endian.c:303

Backtrace (CPU 0), Frame : Return Address

0xffffff80b8a03aa0 : 0xffffff8001822fa9

0xffffff80b8a03b20 : 0xffffff8001b63117

0xffffff80b8a03b70 : 0xffffff8001b57a81

0xffffff80b8a03bb0 : 0xffffff8001a06ebe

0xffffff80b8a03ca0 : 0xffffff8001a03b67

0xffffff80b8a03d40 : 0xffffff8001a0653e

0xffffff80b8a03d90 : 0xffffff8001b8274f

0xffffff80b8a03dc0 : 0xffffff8001b76e30

0xffffff80b8a03e70 : 0xffffff80019fa556

0xffffff80b8a03ea0 : 0xffffff80019e4bc3

0xffffff80b8a03ed0 : 0xffffff80019ddefa

0xffffff80b8a03f40 : 0xffffff80019e4b67

0xffffff80b8a03f50 : 0xffffff8001c3e413

0xffffff80b8a03fb0 : 0xffffff80018f3b76

BSD process name corresponding to current thread: launchd

Mac OS version:

13C1021

Kernel version:

Darwin Kernel Version 13.1.0: Wed Apr 2 23:52:02 PDT 2014; root:xnu-2422.92.1~2/RELEASE_X86_64

Kernel UUID: E9CF78E2-1E9F-3B6F-81A4-FEE6C6D0E4D5

Kernel slide: 0x0000000001600000

Kernel text base: 0xffffff8001800000

System model name: iMac8,1 (Mac-F226BEC8)

System uptime in nanoseconds: 2118859401687

last loaded kext at 1849697132846: com.apple.filesystems.afpfs 11.1 (addr 0xffffff7f83b59000, size 348160)

last unloaded kext at 312712520629: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f83b3b000, size 57344)

loaded kexts:

1. com.Cycling74.driver.Soundflower 1.5.3
2. com.squirrels.airparrot.framebuffer 3
3. com.squirrels.driver.AirParrotSpeakers 1.8
4. com.apple.filesystems.afpfs 11.1
5. com.apple.nke.asp-tcp 8.0.1
6. com.apple.driver.AppleBluetoothMultitouch 80.14
7. com.apple.filesystems.autofs 3.0
8. com.apple.iokit.IOBluetoothSerialManager 4.2.3f10
9. com.apple.driver.AppleHWSensor 1.9.5d0
10. com.apple.driver.AudioAUUC 1.60
11. com.apple.iokit.IOUserEthernet 1.0.0d1
12. com.apple.Dont_Steal_Mac_OS_X 7.0.0
13. com.apple.driver.AppleHDA 2.6.0f1
14. com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
15. com.apple.driver.AppleLPC 1.7.0
16. com.apple.driver.AppleUpstreamUserClient 3.5.13
17. com.apple.kext.AMDFramebuffer 1.2.0
18. com.apple.ATIRadeonX2000 8.2.4
19. com.apple.driver.AppleHWAccess 1
20. com.apple.kext.AMD2400Controller 1.2.0
21. com.apple.driver.AppleSMCPDRC 1.0.0
22. com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.3f10
23. com.apple.driver.AppleBacklight 170.3.5
24. com.apple.driver.AppleMCCSControl 1.1.12
25. com.apple.driver.AppleIRController 325.7
26. com.apple.iokit.SCSITaskUserClient 3.6.6
27. com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
28. com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
29. com.apple.BootCache 35
30. com.apple.driver.XsanFilter 404
31. com.apple.iokit.IOAHCIBlockStorage 2.5.1
32. com.apple.driver.AppleUSBHub 666.4.0
33. com.apple.driver.AirPortBrcm43224 700.36.24
34. com.apple.iokit.AppleYukon2 3.2.3b1
35. com.apple.driver.AppleAHCIPort 3.0.0
36. com.apple.driver.AppleFWOHCI 4.9.9
37. com.apple.driver.AppleIntelPIIXATA 2.5.1
38. com.apple.driver.AppleUSBUHCI 656.4.1
39. com.apple.driver.AppleUSBEHCI 660.4.0
40. com.apple.driver.AppleRTC 2.0
41. com.apple.driver.AppleHPET 1.8
42. com.apple.driver.AppleACPIButtons 2.0
43. com.apple.driver.AppleSMBIOS 2.1
44. com.apple.driver.AppleACPIEC 2.0
45. com.apple.driver.AppleAPIC 1.7
46. com.apple.driver.AppleIntelCPUPowerManagementClient 216.0.0
47. com.apple.nke.applicationfirewall 153
48. com.apple.security.quarantine 3
49. com.apple.driver.AppleIntelCPUPowerManagement 216.0.0
50. com.apple.security.SecureRemotePassword 1.0
51. com.apple.driver.IOBluetoothHIDDriver 4.2.3f10
52. com.apple.driver.AppleMultitouchDriver 245.13
53. com.apple.kext.triggers 1.0
54. com.apple.iokit.IOSerialFamily 10.0.7
55. com.apple.iokit.IOSurface 91
56. com.apple.iokit.IOBluetoothFamily 4.2.3f10
57. com.apple.driver.DspFuncLib 2.6.0f1
58. com.apple.vecLib.kext 1.0.0
59. com.apple.driver.AppleHDAController 2.6.0f1
60. com.apple.iokit.IOHDAFamily 2.6.0f1
61. com.apple.driver.IOPlatformPluginLegacy 1.0.0
62. com.apple.iokit.IOAudioFamily 1.9.5fc2
63. com.apple.kext.OSvKernDSPLib 1.14
64. com.apple.kext.AMDSupport 1.2.0
65. com.apple.AppleGraphicsDeviceControl 3.4.35
66. com.apple.driver.IOPlatformPluginFamily 5.7.0d10
67. com.apple.iokit.IOFireWireIP 2.2.6
68. com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.3f10
69. com.apple.driver.AppleSMC 3.1.8
70. com.apple.driver.AppleBacklightExpert 1.0.4
71. com.apple.iokit.IONDRVSupport 2.4.1
72. com.apple.driver.AppleSMBusController 1.0.11d1
73. com.apple.iokit.IOGraphicsFamily 2.4.1
74. com.apple.driver.AppleUSBHIDKeyboard 170.15
75. com.apple.driver.AppleHIDKeyboard 170.15
76. com.apple.iokit.IOUSBHIDDriver 660.4.0
77. com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.6
78. com.apple.iokit.IOUSBMassStorageClass 3.6.0
79. com.apple.driver.AppleUSBMergeNub 650.4.0
80. com.apple.driver.AppleUSBComposite 656.4.1
81. com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.6
82. com.apple.iokit.IOBDStorageFamily 1.7
83. com.apple.iokit.IODVDStorageFamily 1.7.1
84. com.apple.iokit.IOCDStorageFamily 1.7.1
85. com.apple.iokit.IOATAPIProtocolTransport 3.5.0
86. com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.6
87. com.apple.iokit.IOUSBUserClient 660.4.2
88. com.apple.iokit.IO80211Family 630.35
89. com.apple.iokit.IONetworkingFamily 3.2
90. com.apple.iokit.IOAHCIFamily 2.6.5
91. com.apple.iokit.IOFireWireFamily 4.5.5
92. com.apple.iokit.IOATAFamily 2.5.2
93. com.apple.driver.AppleEFINVRAM 2.0
94. com.apple.driver.AppleEFIRuntime 2.0
95. com.apple.iokit.IOUSBFamily 675.4.0
96. com.apple.iokit.IOHIDFamily 2.0.0
97. com.apple.iokit.IOSMBusFamily 1.1
98. com.apple.security.sandbox 278.11
99. com.apple.kext.AppleMatch 1.0.0d1
100. com.apple.security.TMSafetyNet 7
101. com.apple.driver.AppleKeyStore 2
102. com.apple.driver.DiskImages 371.1
103. com.apple.iokit.IOStorageFamily 1.9
104. com.apple.iokit.IOReportFamily 23
105. com.apple.driver.AppleFDEKeyStore 28.30
106. com.apple.driver.AppleACPIPlatform 2.0
107. com.apple.iokit.IOPCIFamily 2.9
108. com.apple.iokit.IOACPIFamily 1.4
109. com.apple.kec.corecrypto 1.0
110. com.apple.kec.pthread 1

Model: iMac8,1, BootROM IM81.00C1.B00, 2 processors, Intel Core 2 Duo, 2.4 GHz, 6 GB, SMC 1.29f1

Graphics: ATI Radeon HD 2400 XT, ATI Radeon HD 2400, PCIe, 128 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR2 SDRAM, 800 MHz, 0x0000000000000000, 0x563031443253463447423236383236383830

Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 800 MHz, 0x7F98000000000000, 0x393930353239352D3035312E4130304C4600

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)

Bluetooth: Version 4.2.3f10 13477, 3 services, 23 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Network Service: AirPort, AirPort, en1

Serial ATA Device: Samsung SSD 840 Series, 250,06 GB

Parallel ATA Device: MATSHITADVD-R UJ-875

USB Device: Built-in iSight

USB Device: My Passport 0748

USB Device: Keyboard Hub

USB Device: Apple Keyboard

USB Device: MG5400 series

USB Device: IR Receiver

USB Device: BRCM2046 Hub

USB Device: Bluetooth USB Host Controller

Thunderbolt Bus: