I am trying to troubleshoot an employee's 2020 iMac that keeps having kernal panics when using any Google product (Chrome, Google Filestream, even tabs in non-Chrome browsers). We use GSuite in the office and is essential that she is able to use these programs. Here is the crash report:
panic(cpu 3 caller 0xffffff801e575997): "Zone cache element was used after free! Element 0xffffff8084fee480 was corrupted at end; Expected 0xe6513b6ff546f4d6 but found 0xe6513b6ff506f4d6; canary 0x19aec4ef71b81056; zone 0xffffff801eea53f0 (kalloc.576)"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.141.2/osfmk/kern/zcache.c:664
Backtrace (CPU 3), Frame : Return Address
0xffffff98ddf8b960 : 0xffffff801e51a65d
0xffffff98ddf8b9b0 : 0xffffff801e654a75
0xffffff98ddf8b9f0 : 0xffffff801e6465fe
0xffffff98ddf8ba40 : 0xffffff801e4c0a40
0xffffff98ddf8ba60 : 0xffffff801e519d27
0xffffff98ddf8bb60 : 0xffffff801e51a117
0xffffff98ddf8bbb0 : 0xffffff801ecc1a6c
0xffffff98ddf8bc20 : 0xffffff801e575997
0xffffff98ddf8bc60 : 0xffffff801e571bff
0xffffff98ddf8bd90 : 0xffffff801e527584
0xffffff98ddf8be00 : 0xffffff801e4f6922
0xffffff98ddf8be70 : 0xffffff801e50da34
0xffffff98ddf8bf00 : 0xffffff801e62c065
0xffffff98ddf8bfa0 : 0xffffff801e4c1226
BSD process name corresponding to current thread: fontd
Mac OS version:
19H2
Kernel version:
Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64
Kernel UUID: 05D51A3D-3A87-3FF0-98C3-9CF3827A3EDD
Kernel slide: 0x000000001e200000
Kernel text base: 0xffffff801e400000
__HIB text base: 0xffffff801e300000
System model name: iMac19,1 (Mac-AA95B1DDAB278B95)
System shutdown begun: NO
Panic diags file available: YES (0x0)
System uptime in nanoseconds: 43051114220
last loaded kext at 23809867523: >!AHIDKeyboard 209 (addr 0xffffff7fa1b00000, size 45056)
loaded kexts:
>!ATopCaseHIDEventDriver 3430.1
>AudioAUUC 1.70
@fileutil 20.036.15
@filesystems.autofs 3.0
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>!AHDAHardwareConfigDriver 283.15
>!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 3.1.0
>!AHDA 283.15
@kext.AMDRadeonX4000 3.1.0
@kext.AMDRadeonServiceManager 3.1.0
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
>!A!ISlowAdaptiveClocking 4.0.0
>AGDCBacklightControl 5.2.6
>!A!IKBLGraphics 14.0.7
>!ABacklight 180.3
>!ASMCLMU 212
>!A!IPCHPMC 2.0.1
>!AThunderboltIP 3.1.4
>!AFIVRDriver 4.1.0
>!AGFXHDA 100.1.429
>eficheck 1
@kext.AMD9500!C 3.1.0
>!A!ICFLGraphicsFramebuffer 14.0.7
>ACPI_SMC_PlatformPlugin 1.0.0
>!AMCCSControl 1.14
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
>!AFileSystemDriver 3.0.1
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
>!ASDXC 1.7.7
|!ABCM5701Ethernet 10.3.5
>!ABCMWLANBusInterfacePCIe 1
@filesystems.apfs 1412.141.1
>!AAHCIPort 341.140.1
@private.KextAudit 1.0
>!AACPIButtons 6.1
>!ARTC 2.0
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>!AHIDKeyboard 209
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.6f7
>usb.cdc.acm 5.0.0
>usb.serial 6.0.0
>usb.cdc.ecm 5.0.0
>usb.cdc.ncm 5.0.0
@kext.triggers 1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
@kext.AMDRadeonX4400HWLibs 1.0
@kext.AMDRadeonX4000HWServices 3.1.0
>!AGraphicsControl 5.2.6
|IOAVB!F 850.1
@!AGPUWrangler 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
>!ABacklightExpert 1.1.0
>!ASMBusPCI 1.0.14d1
>!AThunderboltEDMSink 4.2.3
>!AThunderboltDPOutAdapter 6.2.6
>!AHDA!C 283.15
|IOHDA!F 283.15
|IO!BHost!CUARTTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
|IONDRVSupport 576.1
@kext.AMDSupport 3.1.0
@!AGraphicsDeviceControl 5.2.6
|IOAccelerator!F2 438.7.3
>IOPlatformPluginLegacy 1.0.0
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
>!ASMBus!C 1.0.18d1
|IOGraphics!F 576.1
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
@plugin.IOgPTPPlugin 840.3
>!UMergeNub 900.4.2
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
>!AThunderboltPCIDownAdapter 2.5.4
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssDmac 3.0.60
>!A!ILpssI2C 3.0.60
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IOEthernetAVB!C 1.1.0
>!ABCMWLANCore 1.0.0
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
>corecapture 1.0.4
|IOSkywalk!F 1
>!AXsanScheme 3
|IOAHCIBlock!S 316.100.5
|IONVMe!F 2.1.0
|IOAHCI!F 290.0.1
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
panic(cpu 3 caller 0xffffff801e575997): "Zone cache element was used after free! Element 0xffffff8084fee480 was corrupted at end; Expected 0xe6513b6ff546f4d6 but found 0xe6513b6ff506f4d6; canary 0x19aec4ef71b81056; zone 0xffffff801eea53f0 (kalloc.576)"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.141.2/osfmk/kern/zcache.c:664
Backtrace (CPU 3), Frame : Return Address
0xffffff98ddf8b960 : 0xffffff801e51a65d
0xffffff98ddf8b9b0 : 0xffffff801e654a75
0xffffff98ddf8b9f0 : 0xffffff801e6465fe
0xffffff98ddf8ba40 : 0xffffff801e4c0a40
0xffffff98ddf8ba60 : 0xffffff801e519d27
0xffffff98ddf8bb60 : 0xffffff801e51a117
0xffffff98ddf8bbb0 : 0xffffff801ecc1a6c
0xffffff98ddf8bc20 : 0xffffff801e575997
0xffffff98ddf8bc60 : 0xffffff801e571bff
0xffffff98ddf8bd90 : 0xffffff801e527584
0xffffff98ddf8be00 : 0xffffff801e4f6922
0xffffff98ddf8be70 : 0xffffff801e50da34
0xffffff98ddf8bf00 : 0xffffff801e62c065
0xffffff98ddf8bfa0 : 0xffffff801e4c1226
BSD process name corresponding to current thread: fontd
Mac OS version:
19H2
Kernel version:
Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64
Kernel UUID: 05D51A3D-3A87-3FF0-98C3-9CF3827A3EDD
Kernel slide: 0x000000001e200000
Kernel text base: 0xffffff801e400000
__HIB text base: 0xffffff801e300000
System model name: iMac19,1 (Mac-AA95B1DDAB278B95)
System shutdown begun: NO
Panic diags file available: YES (0x0)
System uptime in nanoseconds: 43051114220
last loaded kext at 23809867523: >!AHIDKeyboard 209 (addr 0xffffff7fa1b00000, size 45056)
loaded kexts:
>!ATopCaseHIDEventDriver 3430.1
>AudioAUUC 1.70
@fileutil 20.036.15
@filesystems.autofs 3.0
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>!AHDAHardwareConfigDriver 283.15
>!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 3.1.0
>!AHDA 283.15
@kext.AMDRadeonX4000 3.1.0
@kext.AMDRadeonServiceManager 3.1.0
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
>!A!ISlowAdaptiveClocking 4.0.0
>AGDCBacklightControl 5.2.6
>!A!IKBLGraphics 14.0.7
>!ABacklight 180.3
>!ASMCLMU 212
>!A!IPCHPMC 2.0.1
>!AThunderboltIP 3.1.4
>!AFIVRDriver 4.1.0
>!AGFXHDA 100.1.429
>eficheck 1
@kext.AMD9500!C 3.1.0
>!A!ICFLGraphicsFramebuffer 14.0.7
>ACPI_SMC_PlatformPlugin 1.0.0
>!AMCCSControl 1.14
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
>!AFileSystemDriver 3.0.1
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
>!ASDXC 1.7.7
|!ABCM5701Ethernet 10.3.5
>!ABCMWLANBusInterfacePCIe 1
@filesystems.apfs 1412.141.1
>!AAHCIPort 341.140.1
@private.KextAudit 1.0
>!AACPIButtons 6.1
>!ARTC 2.0
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>!AHIDKeyboard 209
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.6f7
>usb.cdc.acm 5.0.0
>usb.serial 6.0.0
>usb.cdc.ecm 5.0.0
>usb.cdc.ncm 5.0.0
@kext.triggers 1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
@kext.AMDRadeonX4400HWLibs 1.0
@kext.AMDRadeonX4000HWServices 3.1.0
>!AGraphicsControl 5.2.6
|IOAVB!F 850.1
@!AGPUWrangler 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
>!ABacklightExpert 1.1.0
>!ASMBusPCI 1.0.14d1
>!AThunderboltEDMSink 4.2.3
>!AThunderboltDPOutAdapter 6.2.6
>!AHDA!C 283.15
|IOHDA!F 283.15
|IO!BHost!CUARTTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
|IONDRVSupport 576.1
@kext.AMDSupport 3.1.0
@!AGraphicsDeviceControl 5.2.6
|IOAccelerator!F2 438.7.3
>IOPlatformPluginLegacy 1.0.0
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
>!ASMBus!C 1.0.18d1
|IOGraphics!F 576.1
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
@plugin.IOgPTPPlugin 840.3
>!UMergeNub 900.4.2
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
>!AThunderboltPCIDownAdapter 2.5.4
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssDmac 3.0.60
>!A!ILpssI2C 3.0.60
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IOEthernetAVB!C 1.1.0
>!ABCMWLANCore 1.0.0
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
>corecapture 1.0.4
|IOSkywalk!F 1
>!AXsanScheme 3
|IOAHCIBlock!S 316.100.5
|IONVMe!F 2.1.0
|IOAHCI!F 290.0.1
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
