Kernel panic happening often

Hello,

I have a 15 inch early 2011 MacBook Pro. I am experiencing frequent kernel panics. Here is the latest report.

Anonymous UUID: F3DC6BA1-651D-5EF1-B9DB-D87C41CF10C1

Wed May 23 16:26:23 2018

*** Panic Report ***

panic(cpu 4 caller 0xffffff8004af8bc8): "vm_map_delete(0xffffff8007a33620,0xffffff806ee31000,0xffffff806ee3b000): " "mismatched entry 0xffffff801a10d5f0 [0xffffff806ee31000:0xffffff806ee3c000]\n"@/BuildRoot/Library/Caches/com.apple. xbs/Sources/xnu/xnu-4570.51.2/osfmk/vm/vm_map.c:7221

Backtrace (CPU 4), Frame : Return Address

0xffffff909ed2b330 : 0xffffff8004a6e166

0xffffff909ed2b380 : 0xffffff8004b96714

0xffffff909ed2b3c0 : 0xffffff8004b88a00

0xffffff909ed2b440 : 0xffffff8004a20180

0xffffff909ed2b460 : 0xffffff8004a6dbdc

0xffffff909ed2b590 : 0xffffff8004a6d99c

0xffffff909ed2b5f0 : 0xffffff8004af8bc8

0xffffff909ed2b740 : 0xffffff8004af8ad2

0xffffff909ed2b780 : 0xffffff8004af4f03

0xffffff909ed2b7b0 : 0xffffff8004a79efd

0xffffff909ed2b800 : 0xffffff8004a7a7a9

0xffffff909ed2b820 : 0xffffff7f868da81c

0xffffff909ed2b920 : 0xffffff8004ce2ae4

0xffffff909ed2b970 : 0xffffff8004ce23af

0xffffff909ed2ba20 : 0xffffff7f8631203d

0xffffff909ed2bae0 : 0xffffff8004fa811a

0xffffff909ed2bbd0 : 0xffffff8004adc119

0xffffff909ed2bc30 : 0xffffff8004adbe93

0xffffff909ed2bc70 : 0xffffff8004aeb011

0xffffff909ed2bd70 : 0xffffff8004aef82a

0xffffff909ed2bf10 : 0xffffff8004b88f92

0xffffff909ed2bfa0 : 0xffffff8004a20092

Kernel Extensions in backtrace:

com.apple.filesystems.hfs.kext(407.50.6)[09445723-F283-31E5-B409-43D905BA81C6]@ 0xffffff7f862ec000->0xffffff7f86352fff

dependency: com.apple.filesystems.hfs.encodings.kext(1)[F737F125-223E-3B67-B4FF-5AB56291D4F E]@0xffffff7f862e4000

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib(1.0)[DE611B2E-7CDB-3E2F -8DE3-9E901934B5D7]@0xffffff7f868d8000->0xffffff7f868ddfff

BSD process name corresponding to current thread: AppleSpell

Mac OS version:

17E202

Kernel version:

Darwin Kernel Version 17.5.0: Fri Apr 13 19:32:32 PDT 2018; root:xnu-4570.51.2~1/RELEASE_X86_64

Kernel UUID: 7134F18E-AAC2-3C5B-B2C4-ABB799B4B9DF

Kernel slide: 0x0000000004800000

Kernel text base: 0xffffff8004a00000

__HIB text base: 0xffffff8004900000

System model name: MacBookPro8,2 (Mac-94245A3940C91C80)

System uptime in nanoseconds: 49373420185135

last loaded kext at 29879000394842: com.apple.filesystems.apfs 748.51.0 (addr 0xffffff7f86d09000, size 1003520)

last unloaded kext at 30075172444550: com.apple.driver.AppleXsanScheme 3 (addr 0xffffff7f86b7b000, size 32768)

loaded kexts:

com.apple.filesystems.smbfs 3.2.2

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AudioAUUC 1.70

com.apple.AGDCPluginDisplayMetrics 3.18.48

com.apple.driver.pmtelemetry 1

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.iokit.IOBluetoothSerialManager 6.0.5f3

com.apple.kext.AMDLegacyFramebuffer 1.6.6

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.kext.AMDRadeonX3000 1.6.6

com.apple.driver.AppleUpstreamUserClient 3.6.5

com.apple.driver.AppleMikeyHIDDriver 131

com.apple.driver.AGPM 110.23.33

com.apple.driver.AppleIntelHD3000Graphics 10.0.4

com.apple.driver.AppleHV 1

com.apple.driver.AGDCBacklightControl 3.18.48

com.apple.driver.AppleHDA 281.51

com.apple.driver.AppleMikeyDriver 281.51

com.apple.driver.eficheck 1

com.apple.kext.AMD6000Controller 1.6.6

com.apple.driver.AirPort.Brcm4331 800.21.30

com.apple.driver.AppleThunderboltIP 3.1.1

com.apple.iokit.AppleBCM5701Ethernet 10.3.1

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleSMCLMU 211

com.apple.driver.AppleOSXWatchdog 1

com.apple.driver.AppleLPC 3.1

com.apple.driver.AppleMuxControl 3.18.48

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleIntelSNBGraphicsFB 10.0.4

com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0

com.apple.driver.SMCMotionSensor 3.0.4d1

com.apple.driver.AppleMCCSControl 1.5.4

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleUSBTCButtons 254

com.apple.driver.AppleUSBTCKeyboard 254

com.apple.driver.AppleIRController 353

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0

com.apple.BootCache 40

com.apple.filesystems.hfs.kext 407.50.6

com.apple.iokit.SCSITaskUserClient 404.30.2

com.apple.driver.AppleSDXC 1.7.6

com.apple.driver.AppleFWOHCI 5.5.9

com.apple.driver.AppleAHCIPort 329.50.2

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleACPIButtons 6.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 6.1

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 220.50.1

com.apple.nke.applicationfirewall 183

com.apple.security.quarantine 3

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 220.50.1

com.apple.iokit.IOSerialFamily 11

com.apple.iokit.IOAVBFamily 675.6

com.apple.plugin.IOgPTPPlugin 675.12

com.apple.iokit.IOAcceleratorFamily2 378.18.1

com.apple.iokit.IOSurface 211.12

com.apple.driver.AppleSSE 1.0

com.apple.driver.DspFuncLib 281.51

com.apple.kext.OSvKernDSPLib 526

com.apple.AppleGPUWrangler 3.18.48

com.apple.driver.AppleBacklightExpert 1.1.0

com.apple.iokit.IONDRVSupport 519.15

com.apple.driver.AppleHDAController 281.51

com.apple.iokit.IOHDAFamily 281.51

com.apple.iokit.IOAudioFamily 206.5

com.apple.vecLib.kext 1.2.0

com.apple.iokit.IOEthernetAVBController 1.1.0

com.apple.driver.AppleSMBusPCI 1.0.14d1

com.apple.AppleGraphicsDeviceControl 3.18.48

com.apple.driver.AppleGraphicsControl 3.18.48

com.apple.iokit.IOFireWireIP 2.2.9

com.apple.kext.AMDLegacySupport 1.6.6

com.apple.iokit.IO80211Family 1200.12.2

com.apple.driver.mDNSOffloadUserClient 1.0.1b8

com.apple.driver.corecapture 1.0.4

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 6.0.0d8

com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0

com.apple.driver.AppleSMBusController 1.0.18d1

com.apple.iokit.IOGraphicsFamily 519.15

com.apple.kext.triggers 1.0

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 6.0.5f3

com.apple.iokit.IOBluetoothHostControllerUSBTransport 6.0.5f3

com.apple.iokit.IOBluetoothHostControllerTransport 6.0.5f3

com.apple.iokit.IOBluetoothFamily 6.0.5f3

com.apple.driver.AppleUSBMultitouch 261

com.apple.driver.usb.IOUSBHostHIDDevice 1.2

com.apple.driver.CoreStorage 546.50.1

com.apple.filesystems.hfs.encodings.kext 1

com.apple.driver.usb.networking 5.0.0

com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2

com.apple.driver.usb.AppleUSBHub 1.2

com.apple.iokit.IOSCSIMultimediaCommandsDevice 404.30.2

com.apple.iokit.IOBDStorageFamily 1.8

com.apple.iokit.IODVDStorageFamily 1.8

com.apple.iokit.IOCDStorageFamily 1.8

com.apple.driver.AppleThunderboltDPInAdapter 5.5.3

com.apple.driver.AppleThunderboltDPAdapterFamily 5.5.3

com.apple.driver.AppleThunderboltPCIDownAdapter 2.1.3

com.apple.iokit.IOAHCISerialATAPI 267.50.1

com.apple.iokit.IOAHCIBlockStorage 301.40.2

com.apple.driver.usb.AppleUSBHostPacketFilter 1.0

com.apple.iokit.IOUSBFamily 900.4.1

com.apple.driver.AppleUSBHostMergeProperties 1.2

com.apple.driver.AppleThunderboltNHI 4.7.2

com.apple.iokit.IOThunderboltFamily 6.7.8

com.apple.iokit.IOFireWireFamily 4.7.0

com.apple.iokit.IOAHCIFamily 288

com.apple.driver.usb.AppleUSBEHCIPCI 1.2

com.apple.driver.usb.AppleUSBEHCI 1.2

com.apple.driver.AppleEFINVRAM 2.1

com.apple.driver.AppleEFIRuntime 2.1

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.AppleFDEKeyStore 28.30

com.apple.driver.AppleEffaceableStorage 1.0

com.apple.driver.AppleKeyStore 2

com.apple.driver.AppleUSBTDM 439.50.6

com.apple.driver.AppleMobileFileIntegrity 1.0.5

com.apple.iokit.IOUSBMassStorageDriver 140.50.3

com.apple.iokit.IOSCSIBlockCommandsDevice 404.30.2

com.apple.iokit.IOSCSIArchitectureModelFamily 404.30.2

com.apple.driver.AppleCredentialManager 1.0

com.apple.driver.KernelRelayHost 1

com.apple.iokit.IOUSBHostFamily 1.2

com.apple.driver.usb.AppleUSBCommon 1.0

com.apple.driver.AppleBusPowerController 1.0

com.apple.driver.AppleSEPManager 1.0.1

com.apple.driver.IOSlaveProcessor 1

com.apple.driver.DiskImages 480.50.10

com.apple.iokit.IOStorageFamily 2.1

com.apple.iokit.IOTimeSyncFamily 675.12

com.apple.iokit.IONetworkingFamily 3.4

com.apple.iokit.IOReportFamily 31

com.apple.driver.AppleACPIPlatform 6.1

com.apple.driver.AppleSMC 3.1.9

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

EOF

Can anyone offer some insight into why this is happening? Thanks.