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Learning to read Kernel Panic logs

I

IceMacMac

macrumors 6502
Original poster
Jun 6, 2010
394
18
I have acquired about 3% mastery in reading KP logs. I've had an undue amount of practice lately.

I've learned:
1. They aren't good!
2. They are most often related to RAM or to a cable/connection, seating of a card, but they can be a software problem.

Can any guru discern the t-leaves below? If my problem isn't the RAM...are we maybe looking at a logic board? I've been getting 3-4 kps per day!

Here is what I believe to be the salient lines. Can anyone give me some hints at what is going on here?





Machine-check capabilities (cpu 8) 0x0000000000001c09:
family: 6 model: 26 stepping: 5 microcode: 17
Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
9 error-reporting banks
threshold-based error status present
extended corrected memory error handling present
Machine-check status 0x0000000000000004:
machine-check in progress
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000800 invalid
IA32_MC1_STATUS(0x405): 0x0000000000000800 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0000000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0000000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0000000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0000000000000000 invalid
Package 1 logged:
IA32_MC8_STATUS(0x421): 0xfe0000400001009f valid
Channel number: 15 (unknown)
Memory Operation: read
Machine-specific error: Read ECC
COR_ERR_CNT: 2
Status bits:
Processor context corrupt
ADDR register valid
MISC register valid
Error enabled
Uncorrected error
Error overflow
IA32_MC8_ADDR(0x422): 0x000000020a95c400
IA32_MC8_MISC(0x423): 0x30b0ce3800041b81
DIMM: 0
Channel: 1
Syndrome: 0x30b0ce38
Package 0 logged:
IA32_MC8_STATUS(0x421): 0x0000000000000000 invalid
panic(cpu 8 caller 0x2a9d27): Machine Check at 0xffff0825, thread:0x3f87d000, trapno:0x12, err:0x0,registers:
CR0: 0x80010033, CR2: 0x4123518c, CR3: 0x00100000, CR4: 0x00000660
EAX: 0xffff07a0, EBX: 0x00000c00, ECX: 0x00000000, EDX: 0xffffc240
ESP: 0xb0627e40, EBP: 0xb0627e48, ESI: 0x1f98ca00, EDI: 0x25fd8270
EFL: 0x00000282, EIP: 0xffff0825

Backtrace (CPU 8), Frame : Return Address (4 potential args on stack)
0x972cdfb8 : 0x21b510 (0x5d9514 0x972cdfec 0x223978 0x0)
0x972ce008 : 0x2a9d27 (0x59abb4 0x59aca1 0xffff0825 0x3f87d000)
0x972ce0f8 : 0x2a1922 (0x1 0x4000008 0x500c 0xd000165)

BSD process name corresponding to current thread: iTunes
 
Based on my vast knowledge of reading Kernel Panic Logs, it looks like the processor could be overheating, which, in turn, is causing your Kernel to Panic.

All joking aside, I would download smcFanControl and post back the temperature that your computer is running at.
 
imaketouchtheme said:
Based on my vast knowledge of reading Kernel Panic Logs, it looks like the processor could be overheating, which, in turn, is causing your Kernel to Panic.

All joking aside, I would download smcFanControl and post back the temperature that your computer is running at.
Click to expand...


I can't say what the temperature was before...but right now CPU 1 is at 109 degrees, which seems low. (It's not in use right now)

Today I did a thorough cleaning of the fans, boards, etc. and re-seated everything. I also ran DiskWarrior. Oh...and I pulled half the RAM out. So we'll see if it runs any cleaner now.
 
Yeah, 109 degrees is a great temperature to be running at. Hmmm.

Let me know how it runs with certain RAM in and post back any recurring Kernel Panics.
 
Possible RAM problem

From my experience with the kernel panics, we would say that the KPs were probably caused by your RAM sticks. I found the defective RAM stick using the Apple Hardware Test.

The following lines in the KP report caught my eyes:
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000800 invalid
IA32_MC1_STATUS(0x405): 0x0000000000000800 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0000000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0000000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0000000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0000000000000000 invalid
 
FrankHahn said:
From my experience with the kernel panics, we would say that the KPs were probably caused by your RAM sticks. I found the defective RAM stick using the Apple Hardware Test.

The following lines in the KP report caught my eyes:
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000800 invalid
IA32_MC1_STATUS(0x405): 0x0000000000000800 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0000000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0000000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0000000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0000000000000000 invalid
Click to expand...


Frank...I've tested the RAM several times with TechToolPro. I guess I could run a longer/deeper test with Apple Hardware Disc.

Do the lines that "caught your eye" point to RAM?
 
IceMacMac said:
panic(cpu 8 caller 0x2a9d27): Machine Check at 0xffff0825, thread:0x3f87d000, trapno:0x12, err:0x0,registers:
CR0: 0x80010033, CR2: 0x4123518c, CR3: 0x00100000, CR4: 0x00000660
EAX: 0xffff07a0, EBX: 0x00000c00, ECX: 0x00000000, EDX: 0xffffc240
ESP: 0xb0627e40, EBP: 0xb0627e48, ESI: 0x1f98ca00, EDI: 0x25fd8270
EFL: 0x00000282, EIP: 0xffff0825

Backtrace (CPU 8), Frame : Return Address (4 potential args on stack)
0x972cdfb8 : 0x21b510 (0x5d9514 0x972cdfec 0x223978 0x0)
0x972ce008 : 0x2a9d27 (0x59abb4 0x59aca1 0xffff0825 0x3f87d000)
0x972ce0f8 : 0x2a1922 (0x1 0x4000008 0x500c 0xd000165)
Click to expand...

A Machine Check (more commonly known as an MCE, or Machine Check Exception) is most commonly caused by bad RAM.

BTW if you want to become a Kernel Panic Ninja and be able to get anything useful out of those stack Backtrace functions/args, become an Apple Developer (it's free) and download/install a Kernel Debug Kit that's appropriate for your OS release. Then you will get symbolic backtraces instead of gobbledigook like "0x972cdfb8".
 
definitely looks like either bad ram or bad motherboard to me:

DIMM: 0
Channel: 1= that's the DIMM and channel showing the errors that caused this log


this is a pretty standard ECC error log actually.
 
Just to finally wrap this up.

I ran an overnight RAM test and my stem froze. So I got an RMA from Other Word Computing and exchanged the RAM.

It's been running pretty good since then.
 
hey guys, i have a similar problem. i just had 3 restarts with this error. i always open last apps and it restarted again and again (lightroom, capture one, opera ... running). the 4th time i made a fresh restart and it worked.

Anonymous UUID: 55443476-DC95-635D-AAB8-ECFD4457A876

Thu Feb 11 21:58:34 2016

*** Panic Report ***
Machine-check capabilities: 0x0000000000000c0a
family: 6 model: 70 stepping: 1 microcode: 15
signature: 0x40661
Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz
10 error-reporting banks
Processor 0: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 1: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 2: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 3: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 4: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 5: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 6: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
Processor 7: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC9_STATUS(0x425): 0xfe413cc00002011b
IA32_MC9_ADDR(0x426): 0x010e9b80001fff1e
IA32_MC9_MISC(0x427): 0x00000003b42241c0
panic(cpu 1 caller 0xffffff800a3d301a): "Machine Check at 0x00007fff8907ee10, registers:\n" "CR0: 0x0000000080010033, CR2: 0x000000010d5ff000, CR3: 0x000000034b23e0da, CR4: 0x00000000001627e0\n" "RAX: 0x00007fff7a5d4d90, RBX: 0x00007fd58a05f010, RCX: 0x00007fff78539fa0, RDX: 0x00007fd58d325638\n" "RSP: 0x00007000029a67c8, RBP: 0x00007000029a6c10, RSI: 0x00007fff8944bb0f, RDI: 0x00007fd58d325630\n" "R8: 0x00000000fffffffc, R9: 0x00007fd589d21a10, R10: 0x00007fd589d25d10, R11: 0x00007fff78539fa0\n" "R12: 0xa3a3a3a3a3a3a3a3, R13: 0x59000e45834f5577, R14: 0x00007fd58a05f038, R15: 0x00007fd58a05f000\n" "RFL: 0x0000000000000246, RIP: 0x00007fff8907ee10, CS: 0x000000000000002b, SS: 0x0000000000000023\n" "Error code: 0x0000000000000000\n"@/Library/Caches/com.apple.xbs/Sources/xnu/xnu-3248.30.4/osfmk/i386/trap_native.c:168
Backtrace (CPU 1), Frame : Return Address
0xffffff91f76fbdd0 : 0xffffff800a2df792
0xffffff91f76fbe50 : 0xffffff800a3d301a
0xffffff91f76fbfb0 : 0xffffff800a3f0acf

BSD process name corresponding to current thread: Opera Helper

Mac OS version:
15D21

Kernel version:
Darwin Kernel Version 15.3.0: Thu Dec 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64
Kernel UUID: DECC9F02-27D7-31F0-9599-A9EF2873902C
Kernel slide: 0x000000000a000000
Kernel text base: 0xffffff800a200000
__HIB text base: 0xffffff800a100000
System model name: MacBookPro11,3 (Mac-2BD1B31983FE1663)

System uptime in nanoseconds: 66323385043
last loaded kext at 14374213568: com.apple.driver.AppleBluetoothHIDKeyboard 181 (addr 0xffffff7f8ce5e000, size 16384)
loaded kexts:
at.obdev.nke.LittleSnitch 4360
com.apple.filesystems.msdosfs 1.10
com.apple.driver.AppleBluetoothMultitouch 90.3
com.apple.filesystems.exfat 1.4
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.filesystems.autofs 3.0
com.apple.driver.AudioAUUC 1.70
com.apple.driver.ApplePlatformEnabler 2.6.0d0
com.apple.driver.AGPM 110.20.22
com.apple.driver.X86PlatformShim 1.0.0
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleGraphicsDevicePolicy 3.7.7
com.apple.driver.AppleHDAHardwareConfigDriver 272.51.3
com.apple.driver.AppleHDA 272.51.3
com.apple.driver.pmtelemetry 1
com.apple.driver.AppleUpstreamUserClient 3.6.1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.driver.AppleIntelHD5000Graphics 10.1.2
com.apple.GeForce 10.0.8
com.apple.iokit.IOBluetoothSerialManager 4.4.3f4
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleBacklight 170.8.8
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.4.3f4
com.apple.driver.AppleHV 1
com.apple.driver.AppleMCCSControl 1.2.13
com.apple.driver.AppleLPC 3.1
com.apple.nvidia.NVDAStartup 10.0.8
com.apple.driver.AppleMuxControl 3.12.6
com.apple.driver.AppleSMCLMU 208
com.apple.driver.AppleCameraInterface 5.41.0
com.apple.driver.AppleIntelFramebufferAzul 10.1.2
com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0
com.apple.driver.AppleFIVRDriver 4.1.0
com.apple.driver.AppleThunderboltIP 3.0.8
com.apple.driver.AppleUSBTCButtons 245.4
com.apple.iokit.SCSITaskUserClient 3.7.7
com.apple.driver.AppleUSBTCKeyEventDriver 245.4
com.apple.driver.AppleUSBTCKeyboard 245.4
com.apple.iokit.IOBluetoothUSBDFU 4.4.3f4
com.apple.driver.AppleUSBStorageCoexistentDriver 3.7.1
com.apple.driver.AppleUSBCardReader 3.7.1
com.apple.driver.CoreStorageFsck 517.20.1
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0
com.apple.BootCache 38
com.apple.iokit.IOAHCIBlockStorage 2.8.5
com.apple.driver.AppleAHCIPort 3.1.8
com.apple.driver.AirPort.Brcm4360 1020.17.1a1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleACPIButtons 4.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 4.0
com.apple.driver.AppleAPIC 1.7
com.apple.nke.applicationfirewall 163
com.apple.security.quarantine 3
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleBluetoothHIDKeyboard 181
com.apple.driver.AppleHIDKeyboard 181
com.apple.driver.IOBluetoothHIDDriver 4.4.3f4
com.apple.driver.AppleMultitouchDriver 304.10
com.apple.driver.AppleHIDTransport 5
com.apple.kext.triggers 1.0
com.apple.driver.DspFuncLib 272.51.3
com.apple.kext.OSvKernDSPLib 525
com.apple.iokit.IOSurface 108.0.1
com.apple.nvidia.driver.NVDAGK100Hal 10.0.8
com.apple.nvidia.driver.NVDAResman 10.0.8
com.apple.iokit.IOSerialFamily 11
com.apple.driver.CoreCaptureResponder 1
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.4.3f4
com.apple.iokit.IOBluetoothFamily 4.4.3f4
com.apple.driver.AppleHDAController 272.51.3
com.apple.iokit.IOHDAFamily 272.51.3
com.apple.iokit.IOAudioFamily 204.3
com.apple.vecLib.kext 1.2.0
com.apple.driver.AppleSMBusController 1.0.14d1
com.apple.driver.AppleBacklightExpert 1.1.0
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.driver.AppleGraphicsControl 3.12.6
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.IOPlatformPluginFamily 6.0.0d7
com.apple.driver.AppleSMBusPCI 1.0.14d1
com.apple.driver.AppleSMC 3.1.9
com.apple.AppleGraphicsDeviceControl 3.12.6
com.apple.iokit.IOAcceleratorFamily2 205.1
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0
com.apple.driver.AppleThunderboltEDMSink 4.1.1
com.apple.driver.AppleThunderboltDPOutAdapter 4.1.3
com.apple.driver.AppleUSBMultitouch 250.5
com.apple.iokit.IOUSBHIDDriver 900.4.1
com.apple.driver.usb.IOUSBHostHIDDevice 1.0.1
com.apple.iokit.IOUSBMassStorageClass 4.0.2
com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.7
com.apple.iokit.IOUSBMassStorageDriver 1.0.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.7
com.apple.driver.usb.AppleUSBHostCompositeDevice 1.0.1
com.apple.driver.usb.AppleUSBHub 1.0.1
com.apple.driver.CoreStorage 517.20.1
com.apple.driver.AppleUSBMergeNub 900.4.1
com.apple.driver.AppleXsanScheme 3
com.apple.iokit.IOAHCIFamily 2.8.1
com.apple.driver.AppleThunderboltDPInAdapter 4.1.3
com.apple.driver.AppleThunderboltDPAdapterFamily 4.1.3
com.apple.driver.AppleThunderboltPCIDownAdapter 2.0.2
com.apple.driver.AppleThunderboltNHI 4.0.4
com.apple.iokit.IOThunderboltFamily 5.1.0
com.apple.iokit.IO80211Family 1110.26
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.iokit.IONetworkingFamily 3.2
com.apple.driver.corecapture 1.0.4
com.apple.driver.usb.AppleUSBXHCIPCI 1.0.1
com.apple.driver.usb.AppleUSBXHCI 1.0.1
com.apple.iokit.IOUSBFamily 900.4.1
com.apple.iokit.IOUSBHostFamily 1.0.1
com.apple.driver.AppleUSBHostMergeProperties 1.0.1
com.apple.driver.AppleEFINVRAM 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.driver.AppleEFIRuntime 2.0
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 417.2
com.apple.iokit.IOStorageFamily 2.1
com.apple.iokit.IOReportFamily 31
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 4.0
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
 
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