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problem in using SampleFilterScheme
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problem in using SampleFilterScheme

  • Subject: problem in using SampleFilterScheme
  • From: Flost Li <email@hidden>
  • Date: Mon, 02 Jul 2012 23:53:36 +0800
Hi all,

I download the SampleFilterScheme example code from https://developer.apple.com/library/mac/#samplecode/SampleFilterScheme/Introduction/Intro.html#//apple_ref/doc/uid/DTS10000432
But I have some issue on making study on it.

I modify the code downloaded, and add the "probe" method. This probe function will scan a scsi disk and check whether it contains certain string on certain offset. If the probe function got the string, the function will return a score of 9999.

I build the project, insert this kext, and than i connect my device.
from the log, i notice that the disk was recognize by the kext, and the kext started.
but soon after the driver start, the system got panic. when i restart the machine, and use gdb/kextutils to decode the panic stack sounds like below:
(as the first several level are the same, i only print the first 7 level of the stack.)

I'm wandering why the iokit got recursive status? does the panic called by the over stack, when the recursive for much time?

Tue Jun 19 15:10:53 2012
panic(cpu 0 caller 0x2aaf41): Double fault at 0x0022315f, thread:0x6efe000, trapno:0x8, err:0x0,registers:
CR0: 0x8001003b, CR2: 0x3073fff8, CR3: 0x00100000, CR4: 0x00000660
EAX: 0x00000069, EBX: 0x30131d74, ECX: 0x30131cec, EDX: 0x00223d48
ESP: 0x30740000, EBP: 0x30740128, ESI: 0x30131d74, EDI: 0x06d0e480
EFL: 0x00010206, EIP: 0x0022315f

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x819e18 : 0x21b837 (0x5dd7fc 0x819e4c 0x223ce1 0x0)
0x819e68 : 0x2aaf41 (0x59dfe4 0x59e0df 0x22315f 0x6efe000)
0x819f58 : 0x2a29d2 (0x0 0x0 0x0 0x0)
0x30740128 : 0x223e31 (0x30131d74 0x30740174 0x223104 0x223d48)
0x30740168 : 0x3013174c (0x30131d74 0x30131cec 0x6d0e480 0x30131d68)  com_apple_dts_driver_SampleFilterScheme::read(IOService*, unsigned long long, IOMemoryDescriptor*, IOStorageCompletion)+122>:
0x307401b8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740208 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740248 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740298 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x307402e8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740328 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740378 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x307403c8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740408 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740458 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x307404a8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x307404e8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740538 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740588 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x307405c8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740618 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740668 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x307406a8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x307406f8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740748 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740788 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x307407d8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740828 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740868 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x307408b8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740908 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740948 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740998 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x307409e8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740a28 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740a78 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740ac8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740b08 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740b58 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740ba8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740be8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740c38 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740c88 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740cc8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740d18 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740d68 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740da8 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740df8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740e48 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740e88 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740ed8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30740f28 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30740f68 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30740fb8 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x30741008 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)
0x30741048 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)
0x30741098 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)
0x307410e8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)  IOStorage::read(IOService*, unsigned long long, IOMemoryDescriptor*, IOStorageCompletion)+97
0x30741128 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)  com_apple_dts_driver_SampleFilterScheme::read)+199
0x30741178 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)  IOStorage::read *)+177
0x307411c8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)  IOStorage::read )+97
0x30741208 : 0x30131799 (0xaeae600 0x6d0e480 0x0 0x0)  com_apple_dts_driver_SampleFilterScheme::read
0x30741258 : 0x2a0b9725 (0x6d0e480 0xaeae600 0x0 0x0)  IOStorage::read
0x307412a8 : 0x2a0b8e7d (0x6d0e480 0xaeae600 0x0 0x0)   IOStorage::read
    Backtrace continues...
      Kernel Extensions in backtrace (with dependencies):
         com.apple.dts.driver.SampleFilterScheme(1.2.0d1)@0x30130000->0x30132fff
            dependency: com.apple.iokit.IOStorageFamily(1.6.3)@0x2a0a7000
         com.apple.iokit.IOStorageFamily(1.6.3)@0x2a0a7000->0x2a0bffff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
10K549

Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun  7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: Macmini3,1 (Mac-F22C86C8)

System uptime in nanoseconds: 1568822487180
unloaded kexts:
com.apple.driver.AppleFileSystemDriver    2.0 (addr 0x300e4000, size 0x12288) - last unloaded 116091913968
loaded kexts:
com.avid.driver.Avid_SCSI    1.2.0 - last loaded 1567760916202
com.sns.driver.SNSArchitectureModel    1.0.0
com.paceap.kext.pacesupport.snowleopard    5.7.2b8
com.logmein.driver.LogMeInSoundDriver    1.0.0
com.digidesign.iokit.DigiIO    8.0.1f1
com.digidesign.iokit.DigiDal    8.0.1f1
com.attotech.driver.ATTOiSCSI    3.2.5
com.cftech.driver.vmeter    1.0.0d1
com.apple.dts.driver.SampleFilterScheme    1.2.0d1
com.apple.driver.AppleHWSensor    1.9.3d0
com.apple.filesystems.autofs    2.1.0
com.apple.driver.ApplePlatformEnabler    2.0.2d1
com.apple.driver.AGPM    100.12.31
com.apple.driver.AudioAUUC    1.57
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.iokit.CHUDUtils    364
com.apple.iokit.CHUDProf    366
com.apple.driver.AppleUpstreamUserClient    3.5.7
com.apple.driver.AppleIntelPenrynProfile    17.1
com.apple.driver.AudioIPCDriver    1.1.6
com.apple.driver.AppleHDA    2.0.5f14
com.apple.driver.AppleMCCSControl    1.0.20
com.apple.nvenet    2.0.17
com.apple.driver.ACPI_SMC_PlatformPlugin    4.7.0a1
com.apple.driver.AppleLPC    1.5.1
com.apple.driver.AirPortBrcm43224    428.42.4
com.apple.GeForce    6.3.6
com.apple.driver.AppleIRController    303.8
com.apple.iokit.SCSITaskUserClient    2.6.8
com.apple.iokit.IOAHCIBlockStorage    1.6.4
com.apple.BootCache    31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.driver.AppleEFINVRAM    1.4.0
com.apple.driver.AppleUSBHub    4.2.4
com.apple.driver.AppleFWOHCI    4.7.3
com.apple.driver.AppleAHCIPort    2.1.7
com.apple.driver.AppleUSBEHCI    4.2.4
com.apple.driver.AppleUSBOHCI    4.2.0
com.apple.driver.AppleRTC    1.3.1
com.apple.driver.AppleHPET    1.5
com.apple.driver.AppleACPIButtons    1.3.6
com.apple.driver.AppleSMBIOS    1.7
com.apple.driver.AppleACPIEC    1.3.6
com.apple.driver.AppleAPIC    1.4
com.apple.driver.AppleIntelCPUPowerManagementClient    142.6.0
com.apple.security.sandbox    1
com.apple.security.quarantine    0
com.apple.nke.applicationfirewall    2.1.14
com.apple.driver.AppleIntelCPUPowerManagement    142.6.0
com.apple.iokit.IOSCSIParallelFamily    2.1.1
com.apple.iokit.IOSCSIBlockCommandsDevice    2.6.8
com.apple.filesystems.acfsctl    412.6
com.apple.filesystems.acfs    412.6
com.apple.driver.AppleProfileReadCounterAction    17
com.apple.driver.AppleProfileTimestampAction    10
com.apple.driver.AppleProfileThreadInfoAction    14
com.apple.driver.AppleProfileRegisterStateAction    10
com.apple.driver.AppleProfileKEventAction    10
com.apple.driver.AppleProfileCallstackAction    20
com.apple.iokit.IOSurface    74.2
com.apple.iokit.IOBluetoothSerialManager    2.4.5f3
com.apple.iokit.IOSerialFamily    10.0.3
com.apple.iokit.CHUDKernLib    365
com.apple.driver.DspFuncLib    2.0.5f14
com.apple.iokit.IOAudioFamily    1.8.3fc2
com.apple.kext.OSvKernDSPLib    1.3
com.apple.driver.AppleHDAController    2.0.5f14
com.apple.iokit.IOHDAFamily    2.0.5f14
com.apple.driver.IOPlatformPluginFamily    4.7.0a1
com.apple.nvidia.nv50hal    6.3.6
com.apple.iokit.IOFireWireIP    2.0.3
com.apple.driver.AppleSMC    3.1.0d5
com.apple.iokit.IO80211Family    320.1
com.apple.iokit.IONetworkingFamily    1.10
com.apple.driver.NVSMU    2.2.7
com.apple.iokit.AppleProfileFamily    41.4
com.apple.NVDAResman    6.3.6
com.apple.iokit.IONDRVSupport    2.2.1
com.apple.iokit.IOGraphicsFamily    2.2.1
com.apple.driver.AppleUSBHIDMouse    162
com.apple.driver.AppleHIDMouse    162
com.apple.driver.AppleUSBHIDKeyboard    141.5
com.apple.driver.AppleHIDKeyboard    141.5
com.apple.driver.BroadcomUSBBluetoothHCIController    2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController    2.4.5f3
com.apple.iokit.IOBluetoothFamily    2.4.5f3
com.apple.iokit.IOUSBHIDDriver    4.2.0
com.apple.driver.AppleUSBMergeNub    4.2.4
com.apple.driver.AppleUSBComposite    3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice    2.6.8
com.apple.iokit.IOBDStorageFamily    1.6
com.apple.iokit.IODVDStorageFamily    1.6
com.apple.iokit.IOCDStorageFamily    1.6.1
com.apple.driver.XsanFilter    402.1
com.apple.iokit.IOAHCISerialATAPI    1.2.6
com.apple.iokit.IOSCSIArchitectureModelFamily    2.6.8
com.apple.iokit.IOUSBUserClient    4.2.4
com.apple.iokit.IOFireWireFamily    4.2.6
com.apple.iokit.IOAHCIFamily    2.0.6
com.apple.iokit.IOUSBFamily    4.2.4
com.apple.driver.AppleEFIRuntime    1.4.0
com.apple.iokit.IOHIDFamily    1.6.6
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.TMSafetyNet    6
com.apple.kext.AppleMatch    1.0.0d1
com.apple.driver.DiskImages    289
com.apple.iokit.IOStorageFamily    1.6.3
com.apple.driver.AppleACPIPlatform    1.3.6
com.apple.iokit.IOPCIFamily    2.6.5
com.apple.iokit.IOACPIFamily    1.3.0

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