sshfs-2.4.1 / osxfuse-2.4.2 kernel panic when a remote directory is mounted twice

[kcleung]

I am using:

sshfs-2.4.1
osxfuse-2.4.2

When I accidentally mount a remote directory the second time, the system kernel panic, rather than returning an error message. Here is the log:

Tue Jul 17 11:07:12 2012
panic(cpu 0 caller 0xffffff8009eb7b95): Kernel trap at 0xffffff8009ef2a91, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x00000000000000c0, CR3: 0x00000000a4cff000, CR4: 0x0000000000000660
RAX: 0x0000000001000005, RBX: 0x0000000000000020, RCX: 0x00000000032f0000, RDX: 0xffffff8012c94550
RSP: 0xffffff806d1b3ca0, RBP: 0xffffff806d1b3cc0, RSI: 0x0000000000000020, RDI: 0xffffff8012c94550
R8: 0x0000000000000000, R9: 0x00000000000003ff, R10: 0xffffffffffffffff, R11: 0x00000000ffffffff
R12: 0xffffff8012cbcb70, R13: 0xffffff801368c000, R14: 0x0000000000000000, R15: 0x00000000000000c0
RFL: 0x0000000000010282, RIP: 0xffffff8009ef2a91, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x00000000000000c0, Error code: 0x0000000000000000, Fault CPU: 0x0

Backtrace (CPU 0), Frame : Return Address
0xffffff806d1b3940 : 0xffffff8009e1d5f6
0xffffff806d1b39b0 : 0xffffff8009eb7b95
0xffffff806d1b3b80 : 0xffffff8009ece4ad
0xffffff806d1b3ba0 : 0xffffff8009ef2a91
0xffffff806d1b3cc0 : 0xffffff7f8bebfb70
0xffffff806d1b3d10 : 0xffffff8009f20bfd
0xffffff806d1b3d60 : 0xffffff8009f11e84
0xffffff806d1b3dd0 : 0xffffff8009f08419
0xffffff806d1b3e20 : 0xffffff800a14ae63
0xffffff806d1b3e50 : 0xffffff800a177a83
0xffffff806d1b3f50 : 0xffffff800a1e17da
0xffffff806d1b3fb0 : 0xffffff8009ececf3
Kernel Extensions in backtrace:
com.github.osxfuse.filesystems.osxfusefs(2.4.2)[682ECF51-9960-3C45-969E-67A8E5CFD55C]@0xffffff7f8bebf000->0xffffff7f8bed3fff

BSD process name corresponding to current thread: mount_osxfusefs

Mac OS version:
12A269

Kernel version:
Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64
Kernel UUID: 8D5F8EF3-9D12-384B-8070-EF2A49C45D24
Kernel slide: 0x0000000009c00000
Kernel text base: 0xffffff8009e00000
System model name: iMac8,1 (Mac-F227BEC8)

System uptime in nanoseconds: 2424767657509
last loaded kext at 240222655756: com.apple.driver.AppleProfileTimestampAction 97 (addr 0xffffff7f8bf33000, size 16384)
last unloaded kext at 178876797418: com.apple.driver.AppleFileSystemDriver 3.0.1 (addr 0xffffff7f8b4bb000, size 8192)
loaded kexts:
com.github.osxfuse.filesystems.osxfusefs 2.4.2
com.sophos.kext.sav 7.3.0
org.virtualbox.kext.VBoxNetAdp 4.1.16
org.virtualbox.kext.VBoxNetFlt 4.1.16
org.virtualbox.kext.VBoxUSB 4.1.16
org.virtualbox.kext.VBoxDrv 4.1.16
com.apple.driver.AppleIntelProfile 97
com.apple.filesystems.smbfs 1.8
com.apple.filesystems.afpfs 10.0
com.apple.nke.asp_tcp 7.0.0
com.apple.filesystems.exfat 1.3
com.apple.iokit.IOBluetoothSerialManager 4.0.9f8
com.apple.filesystems.autofs 3.0
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.driver.AppleHDA 2.3.0f2
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.ApplePolicyControl 3.2.6
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleUpstreamUserClient 3.5.10
com.apple.kext.AMDFramebuffer 8.0.0
com.apple.ATIRadeonX2000 8.0.0
com.apple.driver.AppleLPC 1.6.0
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.0.9f8
com.apple.driver.AppleBacklight 170.2.3
com.apple.driver.AppleMCCSControl 1.0.33
com.apple.driver.AppleIRController 320.15
com.apple.iokit.SCSITaskUserClient 3.5.1
com.apple.driver.XsanFilter 404
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 34
com.apple.iokit.IOAHCIBlockStorage 2.2.0
com.apple.driver.AppleUSBHub 5.1.6
com.apple.driver.AppleIntelPIIXATA 2.5.1
com.apple.driver.AirPortBrcm43224 600.36.17
com.apple.iokit.AppleYukon2 3.2.3b1
com.apple.driver.AppleFWOHCI 4.9.5
com.apple.driver.AppleAHCIPort 2.4.0
com.apple.driver.AppleUSBEHCI 5.1.5
com.apple.driver.AppleUSBUHCI 5.1.5
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.7
com.apple.driver.AppleACPIButtons 1.6
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.6
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0
com.apple.nke.applicationfirewall 4.0.39
com.apple.security.quarantine 2
com.apple.driver.AppleIntelCPUPowerManagement 196.0.0
com.apple.driver.AppleProfileTimestampAction 97
com.apple.driver.AppleProfileThreadInfoAction 97
com.apple.driver.AppleProfileRegisterStateAction 97
com.apple.driver.AppleProfileReadCounterAction 97
com.apple.driver.AppleProfileKEventAction 97
com.apple.driver.AppleProfileCallstackAction 97
com.apple.iokit.AppleProfileFamily 97
com.apple.security.SecureRemotePassword 1.0
com.apple.iokit.IOSerialFamily 10.0.6
com.apple.kext.triggers 1.0
com.apple.driver.DspFuncLib 2.3.0f2
com.apple.iokit.IOAudioFamily 1.8.9fc9
com.apple.kext.OSvKernDSPLib 1.6
com.apple.iokit.IOSurface 86.0.2
com.apple.iokit.IOBluetoothFamily 4.0.9f8
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.AppleSMC 3.1.3d11
com.apple.driver.AppleGraphicsControl 3.2.6
com.apple.driver.IOPlatformPluginFamily 5.2.0d16
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.0.9f8
com.apple.iokit.IOFireWireIP 2.2.5
com.apple.driver.AppleHDAController 2.3.0f2
com.apple.iokit.IOHDAFamily 2.3.0f2
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.iokit.IONDRVSupport 2.3.4
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.kext.AMD2600Controller 8.0.0
com.apple.kext.AMDSupport 8.0.0
com.apple.iokit.IOGraphicsFamily 2.3.4
com.apple.driver.AppleUSBHIDMouse 175.8
com.apple.driver.AppleHIDMouse 175.8
com.apple.driver.AppleUSBHIDKeyboard 165.5
com.apple.driver.AppleHIDKeyboard 165.5
com.apple.iokit.IOUSBHIDDriver 5.0.0
com.apple.iokit.IOSCSIBlockCommandsDevice 3.5.1
com.apple.iokit.IOUSBMassStorageClass 3.5.0
com.apple.driver.AppleUSBMergeNub 5.1.5
com.apple.driver.AppleUSBComposite 5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.1
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.iokit.IOATAPIProtocolTransport 3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.1
com.apple.iokit.IOUSBUserClient 5.0.0
com.apple.iokit.IOATAFamily 2.5.1
com.apple.iokit.IO80211Family 500.15
com.apple.iokit.IONetworkingFamily 3.0
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IOAHCIFamily 2.2.0
com.apple.iokit.IOUSBFamily 5.1.6
com.apple.driver.AppleEFIRuntime 1.6.1
com.apple.iokit.IOHIDFamily 1.8.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 220
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.DiskImages 344
com.apple.iokit.IOStorageFamily 1.8
com.apple.driver.AppleKeyStore 28.18
com.apple.driver.AppleACPIPlatform 1.6
com.apple.iokit.IOPCIFamily 2.7
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0

[bfleischer]

Thanks for the bug report. This issue seems to be limited to OS X 10.8. I'm unable to reproduce it on 10.7. The bad news: I seem to be unable to symbolicate the back trace.

[bfleischer]

This issue should be fixed in commit 76add44afbff6e09ec01cb522dfe0977e91318fa. See the commit message for further details.

[john-griffin]

@bfleischer thanks for the fix, do you know when 2.4.3 will be out?

[bfleischer]

If I don't find any remaining bugs it will be released this week.