I'm getting the same problem. Macbook Pro 16 (2019). Seemed to start occurring after a recent Big Sur update:
panic(cpu 9 caller 0xffffff800669f6b6): [kext.kalloc.2048]: element modified after free (off:1672, val:0xfffffffe00000000, sz:2048, ptr:0xffffff937da7c800, prot:zero)
1672: 0xfffffffe00000000
Backtrace (CPU 9), Frame : Return Address
0xffffffa132adaa80 : 0xffffff8005e8e02d
0xffffffa132adaad0 : 0xffffff8005fd48e3
0xffffffa132adab10 : 0xffffff8005fc4eda
0xffffffa132adab60 : 0xffffff8005e32a2f
0xffffffa132adab80 : 0xffffff8005e8d84d
0xffffffa132adaca0 : 0xffffff8005e8db43
0xffffffa132adad10 : 0xffffff800669d68a
0xffffffa132adad80 : 0xffffff800669f6b6
0xffffffa132adb200 : 0xffffff8005eec816
0xffffffa132adb270 : 0xffffff8005e9d60c
0xffffffa132adb2c0 : 0xffffff80065af582
0xffffffa132adb2e0 : 0xffffff8008f4d73c
0xffffffa132adb300 : 0xffffff8008f5b71c
0xffffffa132adb360 : 0xffffff8008f4de8e
0xffffffa132adb400 : 0xffffff8008f50007
0xffffffa132adb6b0 : 0xffffff8008f4e393
0xffffffa132adb810 : 0xffffff8008f479e5
0xffffffa132adba10 : 0xffffff8006682f9a
0xffffffa132adba50 : 0xffffff80060f19dc
0xffffffa132adbc20 : 0xffffff80060f41a9
0xffffffa132adbd20 : 0xffffff80060f70e0
0xffffffa132adbf40 : 0xffffff8006540dae
0xffffffa132adbfa0 : 0xffffff8005e331f6
Kernel Extensions in backtrace:
com.apple.security.sandbox(300.0)[A8EB8B72-CF6C-313B-96B9-B5BDA3C48E03]@0xffffff8008f3c000-0xffffff8008f81fff
dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[9B4B41D7-B68F-33D5-80A4-2C4C4A649F6D]@0xffffff80074b8000-0xffffff80074cdfff
dependency: com.apple.iokit.IOStorageFamily(2.1)[58EA4506-4E6B-3AC3-A70D-ED35EE2C381D]@0xffffff8008a62000-0xffffff8008a73fff
dependency: com.apple.kext.AppleMatch(1.0.0d1)[47674A56-91B7-3A68-835F-A96648461333]@0xffffff80074b4000-0xffffff80074b6fff
Process name corresponding to current thread: mds
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
20E241
Kernel version:
Darwin Kernel Version 20.4.0: Thu Apr 22 21:46:47 PDT 2021; root:xnu-7195.101.2~1/RELEASE_X86_64
Kernel UUID: 068F99A3-1DB3-31C0-87D5-09942F122BB6
KernelCache slide: 0x0000000005c00000
KernelCache base: 0xffffff8005e00000
Kernel slide: 0x0000000005c10000
Kernel text base: 0xffffff8005e10000
__HIB text base: 0xffffff8005d00000
System model name: MacBookPro16,1 (Mac-E1008331FDC96864)
System shutdown begun: NO
Hibernation exit count: 44
System uptime in nanoseconds: 161940436870002
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00009348b236ebe4
Sleep : 0x00006922e12f9603 0x00009f11c7dab7ea 0x00006916f2c4258e
Wake : 0x0000692313e0179e 0x00009f49a8fbd090 0x00006922f30d5d5e
last started kext at 97018319064226: AudioAUUC 1.70 (addr 0xffffff7f9f18c000, size 12288)
last stopped kext at 94784630241352: !UAudio 405.39 (addr 0xffffff7f9f112000, size 315392)
loaded kexts:
com.box.filesystems.osxfuse 403.11.2
AudioAUUC 1.70
@filesystems.smbfs 3.5
AGPM 122
!APlatformEnabler 2.7.0d0
X86PlatformShim 1.0.0
@filesystems.autofs 3.0
@fileutil 20.036.15
!ATopCaseHIDEventDriver 4040.11
!AHIDALSService 1
@kext.AMDRadeonX6000 4.0.4
!AUpstreamUserClient 3.6.8
@kext.AMDRadeonServiceManager 4.0.4
!A!IKBLGraphics 16.0.2
!A!ICFLGraphicsFramebuffer 16.0.2
!AGraphicsDevicePolicy 6.2.9
BridgeAudioCommunication 140.4
!AAVEBridge 6.1
!AThunderboltIP 4.0.3
@AGDCPluginDisplayMetrics 6.2.9
pmtelemetry 1
|IOUserEthernet 1.0.1
usb.!UUserHCI 1
|IO!BSerialManager 8.0.4d18
@Dont_Steal_Mac_OS_X 7.0.0
!AHV 1
!ADiskImages2 1
!A!ISlowAdaptiveClocking 4.0.0
!A!IPCHPMC 2.0.1
!ABridgeAudio!C 140.4
AGDCBacklightControl 6.2.9
!AMCCSControl 1.14
!AGFXHDA 100.1.433
!AMuxControl2 6.2.9
BCMWLANFirmware4378.Hashstore 1
BCMWLANFirmware4377.Hashstore 1
BCMWLANFirmware4364.Hashstore 1
BCMWLANFirmware4355.Hashstore 1
!AFileSystemDriver 3.0.1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.100.11
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
!ABCMWLANBusInterfacePCIeMac 1
@filesystems.apfs 1677.100.114
@private.KextAudit 1.0
!ASmartBatteryManager 161.0.0
!AACPIButtons 6.1
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 311
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
!UAudio 405.39
@kext.triggers 1.0
!AHS!BDriver 4040.11
IO!BHIDDriver 8.0.4d18
!AActuatorDriver 4440.3
!AMultitouchDriver 4440.3
!AInputDeviceSupport 4400.35
!AHIDKeyboard 224
@kext.AMDRadeonX6100HWLibs 1.0
@kext.AMDRadeonX6000HWServices 4.0.4
X86PlatformPlugin 1.0.0
|IOAccelerator!F2 442.9
|IO!BHost!CUARTTransport 8.0.4d18
|IO!BHost!CTransport 8.0.4d18
!A!ILpssUARTv1 3.0.60
!A!ILpssUARTCommon 3.0.60
!AOnboardSerial 1.0
!AThunderboltDPOutAdapter 8.1.4
|IOAVB!F 940.4
|IOEthernetAVB!C 1.1.0
@!AGPUWrangler 6.2.9
|IOSlowAdaptiveClocking!F 1.0.0
IOPlatformPlugin!F 6.0.0d8
!ABacklightExpert 1.1.0
!ASMBus!C 1.0.18d1
|IONDRVSupport 585.1
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@kext.AMDRadeonX6000Framebuffer 4.0.4
@kext.AMDSupport 4.0.4
!AGraphicsControl 6.2.9
@!AGraphicsDeviceControl 6.2.9
|IOGraphics!F 585.1
@plugin.IOgPTPPlugin 980.4
usb.IOUSBHostHIDDevice 1.2
usb.cdc.ncm 5.0.0
usb.cdc.ecm 5.0.0
usb.!UHub 1.2
usb.cdc 5.0.0
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
!AThunderboltPCIDownAdapter 4.1.1
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!AHPM 3.4.4
!A!ILpssI2C!C 3.0.60
!A!ILpssI2C 3.0.60
!A!ILpssDmac 3.0.60
!ABSDKextStarter 3
|IOSurface 290.7
@filesystems.hfs.encodings.kext 1
!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
IOImageLoader 1.0.0
corecapture 1.0.4
!AXsanScheme 3
usb.!UVHCIBCE 1.2
usb.!UVHCICommonBCE 1.0
usb.!UVHCI 1.2
usb.!UVHCICommon 1.0
!AEffaceableNOR 1.0
|IOBufferCopy!C 1.1.0
|IOBufferCopyEngine!F 1
|IONVMe!F 2.1.0
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 980.4
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.4d18
|IOReport!F 47
|IO!BPacketLogger 8.0.4d18
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.101.1
|IOUSBMass!SDriver 184.101.1
|IOSCSIBlockCommandsDevice 436.100.4
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.100.4
!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
!AFDEKeyStore 28.30
!AEffaceable!S 1.0
!ACredentialManager 1.0
KernelRelayHost 1
|IOUSBHost!F 1.2
!UHostMergeProperties 1.2
usb.!UCommon 1.0
!ABusPower!C 1.0
!ASEPManager 1.0.1
IOSlaveProcessor 1
!AACPIPlatform 6.1
!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
watchdog 1
@kec.pthread 1
@kec.corecrypto 11.1
@kec.Libm 1