OSX Kernel Panic Report

Just got this Kernel p[anic report. Any thoughts on next steps or ideas to fix?...

* Panic Report * panic(cpu 3 caller 0xffffff802cf70d0d): "a freed zone element has been modified in zone kalloc.128: expected 0xffffff8069109580 but found 0xffffff8069119580, bits changed 0x10000, at offset 0 of 128 in element 0xffffff80620cff80, cookies 0x3f00118b7d7cb634 0x5352144d41da7e3"@/SourceCache/xnu/xnu-2782.10.72/osfmk/kern/zalloc.c:496 Backtrace (CPU 3), Frame : Return Address 0xffffff8215e2b0c0 : 0xffffff802cf2fe41 0xffffff8215e2b140 : 0xffffff802cf70d0d 0xffffff8215e2b1b0 : 0xffffff802cf70811 0xffffff8215e2b1f0 : 0xffffff802cf6f657 0xffffff8215e2b320 : 0xffffff802d36a00b 0xffffff8215e2b3f0 : 0xffffff802d3699d5 0xffffff8215e2b4e0 : 0xffffff802d166802 0xffffff8215e2b650 : 0xffffff802d1741e4 0xffffff8215e2b6b0 : 0xffffff802d16f0b4 0xffffff8215e2b730 : 0xffffff802d149f64 0xffffff8215e2bb50 : 0xffffff802d39fc12 0xffffff8215e2bbb0 : 0xffffff802d164f17 0xffffff8215e2bc00 : 0xffffff802d15d143 0xffffff8215e2bf20 : 0xffffff802d1523fa 0xffffff8215e2bf50 : 0xffffff802d44b386 0xffffff8215e2bfb0 : 0xffffff802d036e86

BSD process name corresponding to current thread: icbaccountsd

Mac OS version: 14C109

Kernel version: Darwin Kernel Version 14.1.0: Mon Dec 22 23:10:38 PST 2014; root:xnu-2782.10.72~2/RELEASE_X86_64 Kernel UUID: DCF5C2D5-16AE-37F5-B2BE-ED127048DFF5 Kernel slide: 0x000000002cc00000 Kernel text base: 0xffffff802ce00000 __HIB text base: 0xffffff802cd00000 System model name: iMac12,1 (Mac-942B5BF58194151B)

System uptime in nanoseconds: 13465628889363 last loaded kext at 2954176650039: com.apple.filesystems.msdosfs 1.10 (addr 0xffffff7fafcb2000, size 69632) last unloaded kext at 3097413036585: com.apple.filesystems.msdosfs 1.10 (addr 0xffffff7fafcb2000, size 61440) loaded kexts: com.symantec.kext.SymAPComm 12.7.1f4 com.symantec.kext.fw 5.3.1f4 com.symantec.kext.filesecurity 12.7f4 com.symantec.kext.ips 3.9.2f1 com.symantec.kext.pf 5.7.1f4 com.symantec.kext.internetSecurity 5.4f4 com.apple.filesystems.smbfs 3.0.0 com.apple.filesystems.afpfs 11.0 com.apple.nke.asp-tcp 8.0.0 com.apple.driver.AudioAUUC 1.70 com.apple.driver.AppleHWSensor 1.9.5d0 com.apple.driver.AGPM 100.15.5 com.apple.filesystems.autofs 3.0 com.apple.driver.AppleBluetoothMultitouch 85.3 com.apple.iokit.IOBluetoothSerialManager 4.3.2f6 com.apple.driver.AppleOSXWatchdog 1 com.apple.driver.AppleMikeyHIDDriver 124 com.apple.driver.AppleHDA 269.25 com.apple.driver.AppleUpstreamUserClient 3.6.1 com.apple.kext.AMDFramebuffer 1.3.0 com.apple.AMDRadeonX3000 1.3.0 com.apple.kext.AMD6000Controller 1.3.0 com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0 com.apple.driver.AppleLPC 1.7.3 com.apple.driver.AppleMikeyDriver 269.25 com.apple.iokit.IOUserEthernet 1.0.1 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.driver.AppleHWAccess 1 com.apple.driver.AppleHV 1 com.apple.driver.AppleIntelHD3000Graphics 10.0.0 com.apple.driver.AppleBacklight 170.5.0 com.apple.driver.AppleMCCSControl 1.2.11 com.apple.driver.AppleThunderboltIP 2.0.2 com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.2f6 com.apple.driver.AppleSMCPDRC 1.0.0 com.apple.driver.AppleSMCLMU 2.0.7d0 com.apple.driver.AppleIntelSNBGraphicsFB 10.0.0 com.apple.driver.AppleIRController 327.5 com.apple.iokit.SCSITaskUserClient 3.7.3 com.apple.driver.AppleUSBCardReader 3.5.1 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1 com.apple.BootCache 35 com.apple.driver.XsanFilter 404 com.apple.iokit.IOAHCIBlockStorage 2.7.0 com.apple.driver.AppleUSBHub 705.4.2 com.apple.iokit.AppleBCM5701Ethernet 10.1.3 com.apple.driver.AppleFWOHCI 5.5.2 com.apple.driver.AppleAHCIPort 3.1.0 com.apple.driver.AirPort.Atheros40 700.74.5 com.apple.driver.AppleUSBEHCI 705.4.14 com.apple.driver.AppleRTC 2.0 com.apple.driver.AppleACPIButtons 3.1 com.apple.driver.AppleHPET 1.8 com.apple.driver.AppleSMBIOS 2.1 com.apple.driver.AppleACPIEC 3.1 com.apple.driver.AppleAPIC 1.7 com.apple.driver.AppleIntelCPUPowerManagementClient 218.0.0 com.apple.nke.applicationfirewall 161 com.apple.security.quarantine 3 com.apple.security.TMSafetyNet 8 com.apple.driver.AppleIntelCPUPowerManagement 218.0.0 com.apple.security.SecureRemotePassword 1.0 com.apple.kext.triggers 1.0 com.apple.driver.AppleBluetoothHIDKeyboard 176.2 com.apple.driver.AppleHIDKeyboard 176.2 com.apple.driver.IOBluetoothHIDDriver 4.3.2f6 com.apple.driver.AppleMultitouchDriver 262.33.1 com.apple.iokit.IOSerialFamily 11 com.apple.driver.DspFuncLib 269.25 com.apple.kext.OSvKernDSPLib 1.15 com.apple.iokit.IOAcceleratorFamily2 156.6 com.apple.kext.AMDSupport 1.3.0 com.apple.AppleGraphicsDeviceControl 3.8.6 com.apple.driver.IOPlatformPluginLegacy 1.0.0 com.apple.iokit.IOFireWireIP 2.2.6 com.apple.driver.AppleHDAController 269.25 com.apple.iokit.IOHDAFamily 269.25 com.apple.iokit.IOAudioFamily 203.3 com.apple.vecLib.kext 1.2.0 com.apple.iokit.IOSurface 97 com.apple.iokit.IOUSBUserClient 705.4.0 com.apple.driver.AppleBacklightExpert 1.1.0 com.apple.iokit.IONDRVSupport 2.4.1 com.apple.driver.AppleThunderboltEDMSink 4.0.2 com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.2f6 com.apple.iokit.IOBluetoothFamily 4.3.2f6 com.apple.driver.IOPlatformPluginFamily 5.8.1d38 com.apple.driver.AppleSMC 3.1.9 com.apple.driver.AppleSMBusController 1.0.13d1 com.apple.driver.AppleSMBusPCI 1.0.12d1 com.apple.iokit.IOGraphicsFamily 2.4.1 com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.3 com.apple.iokit.IOBDStorageFamily 1.7 com.apple.iokit.IODVDStorageFamily 1.7.1 com.apple.iokit.IOCDStorageFamily 1.7.1 com.apple.iokit.IOAHCISerialATAPI 2.6.1 com.apple.iokit.IOUSBHIDDriver 705.4.0 com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.3 com.apple.iokit.IOUSBMassStorageClass 3.7.1 com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.3 com.apple.driver.AppleUSBMergeNub 705.4.0 com.apple.driver.AppleUSBComposite 705.4.9 com.apple.driver.AppleThunderboltDPInAdapter 4.0.6 com.apple.driver.AppleThunderboltDPOutAdapter 4.0.6 com.apple.driver.AppleThunderboltDPAdapterFamily 4.0.6 com.apple.driver.AppleThunderboltPCIDownAdapter 2.0.2 com.apple.driver.AppleThunderboltNHI 3.1.7 com.apple.iokit.IOThunderboltFamily 4.2.1 com.apple.iokit.IOEthernetAVBController 1.0.3b3 com.apple.driver.mDNSOffloadUserClient 1.0.1b8 com.apple.iokit.IOFireWireFamily 4.5.6 com.apple.iokit.IOAHCIFamily 2.7.5 com.apple.iokit.IO80211Family 710.55 com.apple.iokit.IONetworkingFamily 3.2 com.apple.iokit.IOUSBFamily 710.4.14 com.apple.driver.AppleEFINVRAM 2.0 com.apple.driver.AppleEFIRuntime 2.0 com.apple.iokit.IOHIDFamily 2.0.0 com.apple.iokit.IOSMBusFamily 1.1 com.apple.security.sandbox 300.0 com.apple.kext.AppleMatch 1.0.0d1 com.apple.driver.AppleKeyStore 2 com.apple.driver.AppleMobileFileIntegrity 1.0.5 com.apple.driver.AppleCredentialManager 1.0 com.apple.driver.DiskImages 396 com.apple.iokit.IOStorageFamily 2.0 com.apple.iokit.IOReportFamily 31 com.apple.driver.AppleFDEKeyStore 28.30 com.apple.driver.AppleACPIPlatform 3.1 com.apple.iokit.IOPCIFamily 2.9 com.apple.iokit.IOACPIFamily 1.4 com.apple.kec.Libm 1 com.apple.kec.pthread 1 com.apple.kec.corecrypto 1.0

System Profile: AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380: 4.0.74.0-P2P Bluetooth: Version 4.3.2f6 15235, 3 services, 27 devices, 1 incoming serial ports Thunderbolt Bus: iMac, Apple Inc., 22.1 Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3035312E4130304C4620 Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3035312E4130304C4620 Memory Module: BANK 0/DIMM1, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3035312E4130304C4620 Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3037332E4130304C4620 USB Device: FaceTime HD Camera (Built-in) USB Device: Hub USB Device: BRCM2046 Hub USB Device: Bluetooth USB Host Controller USB Device: Hub USB Device: IR Receiver USB Device: Internal Memory Card Reader Serial ATA Device: WDC WD1001FALS-403AA0, 1 TB Serial ATA Device: OPTIARC DVD RW AD-5680H Model: iMac12,1, BootROM IM121.0047.B1F, 4 processors, Intel Core i5, 2.7 GHz, 16 GB, SMC 1.71f22 Network Service: Ethernet, Ethernet, en0 Graphics: AMD Radeon HD 6770M, AMD Radeon HD 6770M, PCIe, 512 MB