Hi folks

Got a new imac recently, very nice. Last week I had a kernel panic, hoped it 
was isolated but had three in the last hour. I can't read much from the console 
log (except that 'dart-usb0' is mentioned in a lot posted online) so am hoping 
someone else can see a likely culprit in the log posted below.

I can of course go through a long series of testing each thing; I have three 
USB drives connected (sometimes through a hub built into a 2nd monitor) so it's 
going to be fiddly but while I do that, I thought I'd see what others can read 
here. There's also a monitor attached via a USBC-vga converter.

Happy xmas (or just 'break', if you're getting one) everyone.

Cheers,

Jason

Log:

panic(cpu 0 caller 0xfffffe003d7a4528): "dart-usb0 (0xfffffe24df84a000): 
DART(DARTBLK) error: SID 1 PTE invalid exception on read of DVA 0x10000168000 
(SEG 0 PTE 0x5a) ERROR_SID_SUMMARY 0x00003000 TIME 0x2cccde6a0a9 TTE 0 AXI_ID 
0" @AppleT8110DART.cpp:2257
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 24B2091
Kernel version: Darwin Kernel Version 24.1.0: Thu Nov 14 18:19:02 PST 2024; 
root:xnu-11215.41.3~13/RELEASE_ARM64_T8132
Fileset Kernelcache UUID: 081D0B59BA358E02E05B873C0B717713
Kernel UUID: A824653E-90E1-3DA4-99F0-C3F0A2AE8730
Boot session UUID: 9AC92B65-A162-4FAF-8031-2F5B841A09BD
iBoot version: iBoot-11881.41.5
secure boot?: YES
roots installed: 0
Paniclog version: 14
Debug Header address: 0xfffffe001a7bd000
Debug Header entry count: 3
TXM load address: 0xfffffe002a73c000
TXM UUID: 772CA8A2-ABBC-34D1-8CC3-C295F9A174FE
Debug Header kernelcache load address: 0xfffffe003a73c000
Debug Header kernelcache UUID: 081D0B59-BA35-8E02-E05B-873C0B717713
SPTM load address: 0xfffffe001a73c000
SPTM UUID: 6BE9D6B0-355A-3A55-9531-CC2DA4A7B25A
KernelCache slide: 0x0000000033738000
KernelCache base:  0xfffffe003a73c000
Kernel slide:      0x0000000033740000
Kernel text base:  0xfffffe003a744000
Kernel text exec slide: 0x0000000034e38000
Kernel text exec base:  0xfffffe003be3c000
mach_absolute_time: 0x113a15b002
Epoch Time:        sec       usec
  Boot    : 0x6769937e 0x000b4062
  Sleep   : 0x00000000 0x00000000
  Wake    : 0x00000000 0x00000000
  Calendar: 0x67699f83 0x000d6592

Zone info:
  Zone map: 0xfffffe1012408000 - 0xfffffe3012408000
  . VM    : 0xfffffe1012408000 - 0xfffffe14df0d4000
  . RO    : 0xfffffe14e0000000 - 0xfffffe167a000000
  . GEN0  : 0xfffffe167a000000 - 0xfffffe1b468c0000
  . GEN1  : 0xfffffe1b468c0000 - 0xfffffe2013180000
  . GEN2  : 0xfffffe2013180000 - 0xfffffe24dfa40000
  . GEN3  : 0xfffffe24dfa40000 - 0xfffffe29ac300000
  . DATA  : 0xfffffe29ac300000 - 0xfffffe3012408000
  Metadata: 0xfffffe5076328000 - 0xfffffe507e328000
  Bitmaps : 0xfffffe507e328000 - 0xfffffe5082880000
  Extra   : 0 - 0

CORE 0 recently retired instr at 0x0000000000000000
CORE 1 recently retired instr at 0x0000000000000000
CORE 2 recently retired instr at 0x0000000000000000
CORE 3 recently retired instr at 0x0000000000000000
CORE 4 recently retired instr at 0x0000000000000000
CORE 5 recently retired instr at 0x0000000000000000
CORE 6 recently retired instr at 0x0000000000000000
CORE 7 recently retired instr at 0x0000000000000000
CORE 8 recently retired instr at 0x0000000000000000
CORE 9 recently retired instr at 0x0000000000000000
TPIDRx_ELy = {1: 0xfffffe200371ceb0  0: 0x0000000000000000  0ro: 
0x000000016d7c70e0 }
CORE 0 is the one that panicked. Check the full backtrace for details.
CORE 1: PC=0xfffffe003bfec57c, LR=0xfffffe003bfec578, FP=0xfffffe8d0d557e40
CORE 2: PC=0xfffffe003bfec57c, LR=0xfffffe003bfec578, FP=0xfffffe8d0d0a3e40
CORE 3: PC=0xfffffe003bfec57c, LR=0xfffffe003bfec578, FP=0xfffffe8d0db3fe40
CORE 4: PC=0xfffffe003bfec57c, LR=0xfffffe003bfec578, FP=0xfffffe8d0d44fe40
CORE 5: PC=0xfffffe003bfec57c, LR=0xfffffe003bfec578, FP=0xfffffe8d0be07e40
CORE 6: PC=0xfffffe003bec8e24, LR=0xfffffe003bec8e20, FP=0xfffffe8d0d4afed0
CORE 7: PC=0xfffffe003bec8e24, LR=0xfffffe003bec8e20, FP=0xfffffe8d0d98bed0
CORE 8: PC=0xfffffe003bec8e24, LR=0xfffffe003bec8e20, FP=0xfffffe8d0d503ed0
CORE 9: PC=0xfffffe003bec8e24, LR=0xfffffe003bec8e20, FP=0xfffffe8d0d47fed0
Compressor Info: 3% of compressed pages limit (OK) and 5% of segments limit 
(OK) with 0 swapfiles and OK swap space
Panicked task 0xfffffe24e04540f8: 101 pages, 4 threads: pid 336: 
com.apple.AppleU
Panicked thread: 0xfffffe200371ceb0, backtrace: 0xfffffe59a41434a0, tid: 133654
                  lr: 0xfffffe003be8cc2c  fp: 0xfffffe59a4143530
                  lr: 0xfffffe003bfe8640  fp: 0xfffffe59a41435a0
                  lr: 0xfffffe003bfe6a3c  fp: 0xfffffe59a4143660
                  lr: 0xfffffe003be41d18  fp: 0xfffffe59a4143670
                  lr: 0xfffffe003be8c530  fp: 0xfffffe59a4143a60
                  lr: 0xfffffe003c6f76b0  fp: 0xfffffe59a4143a80
                  lr: 0xfffffe003d7a4528  fp: 0xfffffe59a4143ce0
                  lr: 0xfffffe003d7a3dd8  fp: 0xfffffe59a4143da0
                  lr: 0xfffffe003d7a5d6c  fp: 0xfffffe59a4143ec0
                  lr: 0xfffffe003d7a29a0  fp: 0xfffffe59a4143ee0
                  lr: 0xfffffe003c5fab00  fp: 0xfffffe59a4143f20
                  lr: 0xfffffe003d251140  fp: 0xfffffe59a4143fc0
                  lr: 0xfffffe003bfe9f54  fp: 0xfffffe59a4143fe0
                  lr: 0xfffffe003be41e40  fp: 0xfffffe59a4143ff0
                  lr: 0xfffffe003c67163c  fp: 0xfffffe8d0db97b10
                  lr: 0xfffffe003c671194  fp: 0xfffffe8d0db97b40
                  lr: 0xfffffe003be938e0  fp: 0xfffffe8d0db97be0
                  lr: 0xfffffe003be6a7c4  fp: 0xfffffe8d0db97c40
                  lr: 0xfffffe003be7e250  fp: 0xfffffe8d0db97ca0
                  lr: 0xfffffe003be7e678  fp: 0xfffffe8d0db97da0
                  lr: 0xfffffe003bfe08a8  fp: 0xfffffe8d0db97e50
                  lr: 0xfffffe003bfe6f74  fp: 0xfffffe8d0db97f10
                  lr: 0xfffffe003be41d18  fp: 0xfffffe8d0db97f20
                  lr: 0xfffffe003be41cb0  fp: 0x0000000000000000
      Kernel Extensions in backtrace:
         
com.apple.driver.AppleT8110DART(1.0)[D6131847-8AD3-3749-A777-1F60E149AE26]@0xfffffe003d79c1e0->0xfffffe003d7a99eb
            dependency: 
com.apple.driver.AppleARMPlatform(1.0.2)[78D782C1-58CD-34B0-B687-5AAF12A03932]@0xfffffe003c82efb0->0xfffffe003c882f2b
            dependency: 
com.apple.driver.IODARTFamily(1)[3F1A9B4A-1645-3B40-A690-9E648B8C1490]@0xfffffe003e315b90->0xfffffe003e329693
         
com.apple.driver.AppleInterruptControllerV3(1.0d1)[84AF5C41-F166-3C9D-B9FF-805C99110316]@0xfffffe003d24e190->0xfffffe003d25249b
            dependency: 
com.apple.driver.AppleARMPlatform(1.0.2)[78D782C1-58CD-34B0-B687-5AAF12A03932]@0xfffffe003c82efb0->0xfffffe003c882f2b

last started kext at 510708311: com.apple.driver.AppleActuatorDriver    8410.3 
(addr 0xfffffe003a9e0310, size 7257)
loaded kexts:
com.apple.driver.AppleTopCaseHIDEventDriver     8410.3
com.apple.filesystems.autofs    3.0
com.apple.driver.AppleBiometricServices 1
com.apple.driver.CoreKDL        1
com.apple.iokit.SCSITaskUserClient      498
com.apple.driver.usb.AppleUSBHostBillboardDevice        1.0
com.apple.driver.AppleUSBMassStorageInterfaceNub        556
com.apple.driver.DiskImages.ReadWriteDiskImage  493.0.0
com.apple.driver.DiskImages.UDIFDiskImage       493.0.0
com.apple.driver.DiskImages.RAMBackingStore     493.0.0
com.apple.driver.DiskImages.FileBackingStore    493.0.0
com.apple.driver.AppleThunderboltIP     4.0.3
com.apple.driver.AppleUSBDeviceNCM      5.0.0
com.apple.driver.AppleSmartBatteryManager       161.0.0
com.apple.driver.AppleALSColorSensor    1.0.0d1
com.apple.driver.AppleFileSystemDriver  3.0.1
com.apple.driver.SEPHibernation 1
com.apple.nke.l2tp      1.9
com.apple.filesystems.tmpfs     1
com.apple.driver.ApplePMP       1
com.apple.filesystems.nfs       1
com.apple.filesystems.lifs      1
com.apple.filesystems.apfs      2313.41.1
com.apple.IOTextEncryptionFamily        1.0.0
com.apple.filesystems.hfs.kext  674
com.apple.security.BootPolicy   1
com.apple.BootCache     40
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless     1.0.0d1
com.apple.driver.ApplePMPFirmware       1
com.apple.driver.AppleTypeCRetimer      1.0.0
com.apple.iokit.AppleBCM5701Ethernet    11.0.0
com.apple.driver.AppleSmartIO2  1
com.apple.driver.AppleSamsungSerial     1.0.0d1
com.apple.AppleEmbeddedSimpleSPINORFlasher      1
com.apple.driver.AppleSerialShim        1
com.apple.driver.AppleAVE2      803.36.1
com.apple.driver.AppleProResHW  426.1
com.apple.driver.ApplePMUFirmwareDriver 1.0.0
com.apple.driver.AppleAVD       807
com.apple.driver.AppleQSPIMC    1
com.apple.driver.AppleCS42L84Audio      810.2
com.apple.driver.AppleMobileDispH16G-DCP        140.0
com.apple.driver.AppleJPEGDriver        7.1.5
com.apple.driver.AudioDMAController-T8132       400.97
com.apple.driver.usb.AppleSynopsysUSB40XHCI     1
com.apple.driver.AppleSN012776Amp       810.2
com.apple.AGXG16G       322.10
com.apple.driver.AppleT8132SOCTuner     1
com.apple.driver.AppleT8132CLPC 1
com.apple.driver.AppleDPDisplayTCON     1
com.apple.driver.AppleEventLogHandler   1
com.apple.driver.AppleT8132PMGR 1
com.apple.driver.AppleS8000AES  1
com.apple.driver.AppleS5L8920XPWM       1.0.0d1
com.apple.driver.AppleS8000DWI  1.0.0d1
com.apple.driver.AppleInterruptControllerV3     1.0.0d1
com.apple.driver.AppleBluetoothModule   1
com.apple.driver.AppleBCMWLANBusInterfacePCIe   1
com.apple.driver.AppleT8110DART 1
com.apple.driver.AppleS5L8940XI2C       1.0.0d2
com.apple.driver.AppleSPIMC     1
com.apple.driver.AppleM68Buttons        1.0.0d1
com.apple.driver.AppleT8132     1
com.apple.iokit.IOUserEthernet  1.0.1
com.apple.driver.usb.AppleUSBUserHCI    1
com.apple.iokit.IOKitRegistryCompatibility      1
com.apple.iokit.EndpointSecurity        1
com.apple.driver.AppleDiskImages2       379.0.11
com.apple.AppleSystemPolicy     2.0.0
com.apple.kec.InvalidateHmac    1
com.apple.kec.AppleEncryptedArchive     1
com.apple.driver.AppleActuatorDriver    8410.3
com.apple.driver.AppleHIDKeyboard       8010.1
com.apple.driver.AppleMultitouchDriver  8410.3
com.apple.driver.AppleInputDeviceSupport        8000.26
com.apple.driver.AppleHSBluetoothDriver 8410.3
com.apple.driver.IOBluetoothHIDDriver   9.0.0
com.apple.driver.driverkit.serial       6.0.0
com.apple.driver.AppleMesaSEPDriver     100.99
com.apple.iokit.IOBiometricFamily       1
com.apple.driver.usb.IOUSBHostHIDDevice 1.2
com.apple.driver.AppleThunderboltPCIUpAdapter   4.1.1
com.apple.driver.usb.cdc        5.0.0
com.apple.driver.AppleUSBAudio  701.72
com.apple.iokit.IOAudioFamily   600.2
com.apple.vecLib.kext   1.2.0
com.apple.driver.DiskImages.KernelBacked        493.0.0
com.apple.iokit.IOAVBFamily     1300.26
com.apple.driver.AppleXsanScheme        3
com.apple.driver.AppleUVDMDriver        1.0.0
com.apple.driver.AppleUVDM      1.0.0
com.apple.driver.usb.networking 5.0.0
com.apple.driver.AppleThunderboltUSBDownAdapter 1.0.4
com.apple.driver.AppleSEPHDCPManager    1.0.1
com.apple.driver.AppleThunderboltDPInAdapter    8.5.1
com.apple.driver.AppleThunderboltDPAdapterFamily        8.5.1
com.apple.driver.AppleConvergedIPCOLYBTControl  1
com.apple.driver.AppleConvergedPCI      1
com.apple.driver.AppleBluetoothDebug    1
com.apple.driver.AppleThunderboltPCIDownAdapter 4.1.1
com.apple.driver.AppleBTM       1.0.1
com.apple.driver.IOPAudioIOBufferDevice 200.39
com.apple.driver.IOPAudioLPMicDevice    200.39
com.apple.driver.IOPAudioClientManagerDevice    200.39
com.apple.driver.AppleIOPADMAStream     200.17
com.apple.driver.IOPAudioVoiceTriggerDevice     400.40
com.apple.driver.AOPAudio2      200.11
com.apple.driver.AppleTrustedAccessory  1
com.apple.iokit.AppleSEPGenericTransfer 1
com.apple.nke.ppp       1.9
com.apple.driver.AppleBSDKextStarter    3
com.apple.kext.triggers 1.0
com.apple.driver.IOHIDPowerSource       1
com.apple.driver.AppleCallbackPowerSource       1
com.apple.filesystems.hfs.encodings.kext        1
com.apple.driver.AppleSyntheticGameController   12.1.3
com.apple.AGXFirmwareKextG16GRTBuddy    1
com.apple.AGXFirmwareKextRTBuddy64      322.10
com.apple.driver.AppleDCPDPTXProxy      1.0.0
com.apple.driver.DCPDPFamilyProxy       1
com.apple.iokit.IONVMeFamily    2.1.0
com.apple.plugin.IOgPTPPlugin   1300.51
com.apple.driver.AppleSART      1
com.apple.driver.ApplePTD       1.0.0
com.apple.driver.AppleDiagnosticDataAccessReadOnly      1.0.0
com.apple.driver.AppleNANDConfigAccess  1.0.0
com.apple.driver.AppleSPU       1
com.apple.driver.AppleH16ANEInterface   8.107.2
com.apple.driver.AppleH16CameraInterface        3.111.0
com.apple.driver.AppleStockholmControl  1.0.0
com.apple.driver.AppleSPMIPMU   1.0.1
com.apple.driver.AppleDialogPMU 1.0.1
com.apple.driver.AppleCSEmbeddedAudio   810.2
com.apple.driver.ExclaveSEPManagerProxy 1
com.apple.iokit.IOMobileGraphicsFamily-DCP      343.0.0
com.apple.iokit.IOMobileGraphicsFamily  343.0.0
com.apple.driver.DCPAVFamilyProxy       1
com.apple.driver.AppleM2ScalerCSCDriver 265.0.0
com.apple.driver.AppleDCP       1
com.apple.driver.AppleUSBXDCIARM        1.0
com.apple.driver.AppleUSBXDCI   1.0
com.apple.iokit.IOUSBDeviceFamily       2.0.0
com.apple.driver.DMAChannelProxy        400.97
com.apple.driver.AudioSharedDARTMapperProxy     200.54
com.apple.driver.AudioDMAFamily 400.97
com.apple.driver.AudioDMACLLTEscalationDetector-Stub    400.97
com.apple.driver.AppleHPM       3.4.4
com.apple.driver.usb.AppleSynopsysUSBXHCI       1
com.apple.driver.usb.AppleUSBXHCI       1.2
com.apple.driver.AppleEmbeddedUSBHost   1
com.apple.driver.usb.AppleUSBHub        1.2
com.apple.driver.usb.AppleUSBHostCompositeDevice        1.2
com.apple.driver.AppleEmbeddedAudio     810.2
com.apple.iokit.AppleARMIISAudio        400.22
com.apple.driver.IISAudioIsolatedStreamECProxy  400.22
com.apple.driver.ExclavesAudioKext      200.54
com.apple.iokit.IOGPUFamily     104.1.2
com.apple.driver.AppleT8132TypeCPhy     1
com.apple.driver.ApplePassthroughPPM    3.0
com.apple.driver.usb.AppleUSBHostPacketFilter   1.0
com.apple.driver.AppleFirmwareKit       1
com.apple.driver.ApplePMGR      1
com.apple.driver.AppleA7IOP-ASCWrap-v6  1.0.2
com.apple.driver.AppleARMWatchdogTimer  1
com.apple.driver.AppleDisplayCrossbar   1.0.0
com.apple.iokit.IODisplayPortFamily     1.0.0
com.apple.driver.AppleTypeCPhy  1
com.apple.driver.AppleThunderboltNHI    7.2.81
com.apple.driver.AppleT8132PCIeC        1
com.apple.iokit.IOThunderboltFamily     9.3.3
com.apple.iokit.IOPortFamily    1.0
com.apple.driver.ApplePIODMA    1
com.apple.driver.AppleA7IOP-MXWrap-v1   1.0.2
com.apple.driver.AppleT8132PCIe 1
com.apple.driver.AppleBluetoothDebugService     1
com.apple.driver.AppleBCMWLANCore       1.0.0
com.apple.iokit.IO80211Family   1200.13.1
com.apple.driver.IOImageLoader  1.0.0
com.apple.driver.AppleOLYHAL    1
com.apple.iokit.IOPAudioDriverFamily    200.11
com.apple.driver.AppleEmbeddedAudioLibs 400.9
com.apple.driver.AppleFirmwareUpdateKext        1
com.apple.driver.AppleSPMI      1.0.1
com.apple.driver.AppleGPIOICController  1.0.2
com.apple.driver.AppleMobileApNonce     1
com.apple.driver.AppleEverestErrorHandler       1
com.apple.driver.AppleMultiFunctionManager      1
com.apple.driver.corecapture    1.0.4
com.apple.driver.AppleEmbeddedPCIE      1
com.apple.iokit.IOTimeSyncFamily        1300.51
com.apple.driver.DiskImages     493.0.0
com.apple.iokit.IOGraphicsFamily        598
com.apple.iokit.IOBluetoothFamily       9.0.0
com.apple.driver.AppleUIO       1
com.apple.driver.AppleT8132ANEHAL       8.107.3
com.apple.driver.AppleSSE       1.0
com.apple.driver.AppleSEPKeyStore       2
com.apple.driver.AppleUSBTDM    556
com.apple.iokit.IOUSBMassStorageDriver  250
com.apple.iokit.IOPCIFamily     2.9
com.apple.iokit.IOUSBHostFamily 1.2
com.apple.driver.AppleUSBHostMergeProperties    1.2
com.apple.driver.usb.AppleUSBCommon     1.0
com.apple.driver.AppleSMC       3.1.9
com.apple.driver.RTBuddy        1.0.0
com.apple.driver.AppleEmbeddedTempSensor        1.0.0
com.apple.driver.AppleARMPMU    1.0
com.apple.iokit.IOAccessoryManager      1.0.0
com.apple.driver.AppleOnboardSerial     1.0
com.apple.iokit.IOSerialFamily  11
com.apple.iokit.IOSCSIBlockCommandsDevice       498
com.apple.iokit.IOSCSIArchitectureModelFamily   498
com.apple.driver.AppleRSMChannel        1
com.apple.iokit.IORSMFamily     1
com.apple.driver.AppleLockdownMode      1
com.apple.driver.AppleIPAppender        1.0
com.apple.iokit.IOSkywalkFamily 1.0
com.apple.driver.mDNSOffloadUserClient  1.0.1b8
com.apple.iokit.IONetworkingFamily      3.4
com.apple.driver.AppleFDEKeyStore       28.30
com.apple.driver.AppleEffaceableStorage 1.0
com.apple.driver.AppleCredentialManager 1.0
com.apple.driver.AppleSEPManager        1.0.1
com.apple.driver.IODARTFamily   1
com.apple.driver.AppleA7IOP     1.0.2
com.apple.driver.IOSlaveProcessor       1
com.apple.driver.AppleBiometricSensor   2
com.apple.iokit.IOHIDFamily     2.0.0
com.apple.AUC   1.0
com.apple.iokit.IOSurface       372.2.3
com.apple.iokit.IOAVFamily      1.0.0
com.apple.iokit.IOHDCPFamily    1.0.0
com.apple.iokit.IOCECFamily     1
com.apple.iokit.IOAudio2Family  1.0
com.apple.driver.AppleIISController     400.1
com.apple.driver.AppleAudioClockLibs    400.9
com.apple.driver.FairPlayIOKit  72.10.0
com.apple.driver.AppleARMPlatform       1.0.2
com.apple.iokit.IOSlowAdaptiveClockingFamily    1.0.0
com.apple.iokit.IOReportFamily  47
com.apple.security.quarantine   4
com.apple.security.sandbox      300.0
com.apple.iokit.IOStorageFamily 2.1
com.apple.kext.AppleMatch       1.0.0d1
com.apple.driver.AppleMobileFileIntegrity       1.0.5
com.apple.iokit.CoreAnalyticsFamily     1
com.apple.security.AppleImage4  7.0.0
com.apple.kext.CoreTrust        1
com.apple.iokit.IOCryptoAcceleratorFamily       1.0.1
com.apple.kec.pthread   1
com.apple.kec.XrtHostedXnu      1
com.apple.kec.Libm      1
com.apple.kec.Compression       1.0
com.apple.kec.corecrypto        14.0



** Stackshot Succeeded ** Bytes Traced 607870 (Uncompressed 1538592) **

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