Assistance with interpreting kernel panic log

[pcgolfer85]

I received a kernel panic today and need assistance with interpreting the log.

Anonymous UUID:       63370C49-C615-C245-F36E-F0254F946B09
 
 
Wed Jan  7 13:26:51 2015
panic(cpu 2 caller 0xffffff800e7db680): "vnode_rele_ext: vp 0xffffff80248713c0 usecount -ve : -1.  v_tag = 23, v_type = 2, v_flag = 4800."@/SourceCache/xnu/xnu-2422.115.4/bsd/vfs/vfs_subr.c:1788
Backtrace (CPU 2), Frame : Return Address
0xffffff8118623920 : 0xffffff800e622f79
0xffffff81186239a0 : 0xffffff800e7db680
0xffffff81186239e0 : 0xffffff7f907080a1
0xffffff8118623bf0 : 0xffffff800e7ff667
0xffffff8118623c90 : 0xffffff800e7fefe1
0xffffff8118623de0 : 0xffffff800e7ec090
0xffffff8118623f60 : 0xffffff800ea409a7
0xffffff8118623fb0 : 0xffffff800e6f3e68
      Kernel Extensions in backtrace:
         com.apple.filesystems.smbfs(2.0.3)[EC68D5F4-45EA-379A-B723-AEEDE9C94055]@0xffff ff7f906f0000->0xffffff7f90741fff
            dependency: com.apple.kec.corecrypto(1.0)[DB137B94-65D2-32AF-B5BC-80A360E104C3]@0xffffff7f8 ef44000
            dependency: com.apple.kext.triggers(1.0)[A7018A2E-1C0C-37B8-9382-67786A396EAF]@0xffffff7f8e f8b000
 
 
BSD process name corresponding to current thread: Microsoft Word
 
 
Mac OS version:
13F34
 
 
Kernel version:
Darwin Kernel Version 13.4.0: Sun Aug 17 19:50:11 PDT 2014; root:xnu-2422.115.4~1/RELEASE_X86_64
Kernel UUID: 9477416E-7BCA-3679-AF97-E1EAAD3DD5A0
Kernel slide:     0x000000000e400000
Kernel text base: 0xffffff800e600000
System model name: iMac14,4 (Mac-81E3E92DD6088272)
 
 
System uptime in nanoseconds: 5297622392611
last loaded kext at 756979202715: com.apple.filesystems.smbfs 2.0.3 (addr 0xffffff7f906f0000, size 335872)
last unloaded kext at 326323411121: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f906f0000, size 57344)
loaded kexts:
com.sophos.kext.sav 9.2.50
com.sophos.nke.swi 9.2.50
com.apple.filesystems.smbfs 2.0.3
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AGPM 100.14.34
com.apple.driver.ApplePlatformEnabler 2.0.9d7
com.apple.driver.X86PlatformShim 1.0.0
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleBluetoothMultitouch 80.14
com.apple.driver.AppleHDA 2.6.3f4
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.iokit.IOBluetoothSerialManager 4.2.7f3
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.7f3
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.driver.AppleThunderboltIP 1.1.2
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleLPC 1.7.0
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.driver.AppleMCCSControl 1.2.5
com.apple.driver.AppleIntelHD5000Graphics 8.2.8
com.apple.driver.AppleIntelFramebufferAzul 8.2.8
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeLZVN 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.driver.AppleUSBHub 683.4.0
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.6.0
com.apple.driver.AppleSDXC 1.5.2
com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2
com.apple.driver.AirPort.Brcm4360 842.21.65
com.apple.driver.AppleAHCIPort 3.0.5
com.apple.driver.AppleUSBXHCI 683.4.0
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleAPIC 1.7
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.kext.triggers 1.0
com.apple.driver.AppleBluetoothHIDKeyboard 170.15
com.apple.driver.AppleHIDKeyboard 170.15
com.apple.driver.IOBluetoothHIDDriver 4.2.7f3
com.apple.driver.AppleMultitouchDriver 245.13.1
com.apple.driver.DspFuncLib 2.6.3f4
com.apple.vecLib.kext 1.0.0
com.apple.iokit.IOAudioFamily 1.9.7fc2
com.apple.kext.OSvKernDSPLib 1.14
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.7f3
com.apple.iokit.IOBluetoothFamily 4.2.7f3
com.apple.driver.AppleThunderboltEDMSink 2.1.3
com.apple.driver.AppleHDAController 2.6.3f4
com.apple.iokit.IOHDAFamily 2.6.3f4
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.7.1d6
com.apple.driver.AppleSMC 3.1.8
com.apple.driver.AppleSMBusController 1.0.12d1
com.apple.iokit.IOSurface 91.1
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.AppleGraphicsDeviceControl 3.6.22
com.apple.iokit.IOAcceleratorFamily2 98.23
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.7
com.apple.driver.AppleUSBMergeNub 650.4.0
com.apple.driver.AppleUSBComposite 656.4.1
com.apple.driver.AppleThunderboltDPInAdapter 3.1.7
com.apple.driver.AppleThunderboltDPOutAdapter 3.1.7
com.apple.driver.AppleThunderboltDPAdapterFamily 3.1.7
com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5
com.apple.iokit.IOUSBUserClient 660.4.2
com.apple.iokit.IOEthernetAVBController 1.0.3b4
com.apple.driver.AppleThunderboltNHI 2.0.1
com.apple.iokit.IOThunderboltFamily 3.3.1
com.apple.iokit.IO80211Family 640.36
com.apple.driver.mDNSOffloadUserClient 1.0.1b5
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOAHCIFamily 2.6.5
com.apple.iokit.IOUSBFamily 686.4.1
com.apple.driver.AppleEFINVRAM 2.0
com.apple.driver.AppleEFIRuntime 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 278.11.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages 371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 23
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 2.0
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.pthread 1
com.apple.kec.corecrypto 1.0
 
 
System Profile:
Model: iMac14,4, BootROM IM144.0179.B03, 2 processors, Intel Core i5, 1.4 GHz, 8 GB, SMC 2.21f88
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E424C54414C41522D4E5444
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E424C54414C41522D4E5444
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x111), Broadcom BCM43xx 1.0 (6.30.223.154.65)
Bluetooth: Version 4.2.7f3 14616, 3 services, 23 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: APPLE HDD HTS545050A7E362, 500.11 GB
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
Thunderbolt Bus: iMac, Apple Inc., 30.8

OS X Mavericks (10.9.5), iMac (Mid 2014)

 

[old-wiz]

I would start with getting rid of sophos.

 

[pcgolfer85]

Sophos was uninstalled soon after the kernel panic occurred, but since then the machine has failed twice more.

 

[kpgh554]

if this report after removing sophos you may have to remove the remaining files manually. most kernel panics are ram related so could be worthwhile checking ram not iffy

 

[WilliamG]

What are you doing when it fails? Any file transfers or unplugging of devices?

 

[pcgolfer85]

The user says he is usually browsing the Internet and working in Microsoft Word when it fails. No peripheral devices are connected other than an Apple wireless keyboard and mouse.

 

[pcgolfer85]

Here is the log file from Etrecheck. Thanks!

EtreCheck version: 2.1.5 (108)
Report generated January 12, 2015 at 8:23:46 AM EST

Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.

Hardware Information: ℹ️
iMac (21.5-inch, Mid 2014) (Verified)
iMac - model: iMac14,4
1 1.4 GHz Intel Core i5 CPU: 2-core
8 GB RAM Not upgradeable
BANK 0/DIMM0
4 GB DDR3 1600 MHz ok
BANK 1/DIMM0
4 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n/ac

Video Information: ℹ️
Intel HD Graphics 5000
iMac 1920 x 1080

System Software: ℹ️
OS X 10.9.5 (13F34) - Uptime: 0:3:54

Disk Information: ℹ️
APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 499.25 GB (470.24 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

USB Information: ℹ️
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
Corsair Survivor GTR 32.48 GB
CORSAIR (disk1s1) /Volumes/CORSAIR : 32.48 GB (24.17 GB free)

Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️
Mac App Store and identified developers

Launch Agents: ℹ️
[loaded] com.oracle.java.Java-Updater.plist [Support]

Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.microsoft.office.licensing.helper.plist [Support]
[loaded] com.oracle.java.Helper-Tool.plist [Support]

User Login Items: ℹ️
None

Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 16.0.0.235 - SDK 10.6 [Support]
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 16.0.0.235 - SDK 10.6 [Support]
Default Browser: Version: 537 - SDK 10.9
SharePointBrowserPlugin: Version: 14.4.7 - SDK 10.6 [Support]
MeetingJoinPlugin: Version: Unknown - SDK 10.6 [Support]
JavaAppletPlugin: Version: Java 7 Update 71 Check version

3rd Party Preference Panes: ℹ️
Flash Player [Support]
Java [Support]

Time Machine: ℹ️
Time Machine not configured!

Top Processes by CPU: ℹ️
17% mds
14% mdworker
3% WindowServer
0% fontd
0% AppleSpell

Top Processes by Memory: ℹ️
120 MB com.apple.IconServicesAgent
103 MB mds_stores
77 MB ocspd
77 MB Finder
60 MB SystemUIServer

Virtual Memory Information: ℹ️
5.59 GB Free RAM
1.74 GB Active RAM
501 MB Inactive RAM
757 MB Wired RAM
347 MB Page-ins
0 B Page-outs

Diagnostics Information: ℹ️
Jan 12, 2015, 08:20:25 AM Self test - passed
Jan 9, 2015, 03:04:38 PM /Library/Logs/DiagnosticReports/Kernel_2015-01-09-150438_[redacted].panic [Details]
Jan 7, 2015, 01:26:51 PM /Library/Logs/DiagnosticReports/Kernel_2015-01-07-132651_[redacted].panic [Details]