Q: macbook  pro often crash and reboot

Hi everybody!
my macbook pro mid2012 (mountain lion), this morning started to crash by itself and reboot.

the only "unusual" thing that i did today, before the crashes, was to use my external firewire audio device (focusrite saffire pro24), with a new power supply.

i'm very frightened because i'm working with audio (Logic) and i'm mixing lot of tracks in these days.... can anyone help me??
thanks to everybody...

the log after the last crash is this:

Interval Since Last Panic Report:  18096303 sec

Panics Since Last Report:          3

Anonymous UUID:                    42B432CE-1AC5-86AB-B2F7-55DE662CC036

Tue Apr 28 18:24:19 2015

panic(cpu 0 caller 0xffffff80098444db): "a freed zone element has been modified in zone: namecache"@/SourceCache/xnu/xnu-2050.48.11/osfmk/kern/zalloc.c:214

Backtrace (CPU 0), Frame : Return Address

0xffffff80f90b3550 : 0xffffff800981d636

0xffffff80f90b35c0 : 0xffffff80098444db

0xffffff80f90b3600 : 0xffffff8009843d52

0xffffff80f90b36e0 : 0xffffff80098e8466

0xffffff80f90b3720 : 0xffffff80098e87a0

0xffffff80f90b3750 : 0xffffff8009b00f36

0xffffff80f90b3970 : 0xffffff8009918894

0xffffff80f90b39b0 : 0xffffff80098f27cc

0xffffff80f90b3a30 : 0xffffff80098f21ae

0xffffff80f90b3af0 : 0xffffff8009910230

0xffffff80f90b3b90 : 0xffffff8009902bc9

0xffffff80f90b3c40 : 0xffffff80099034a2

0xffffff80f90b3f50 : 0xffffff8009be97ba

0xffffff80f90b3fb0 : 0xffffff80098cf453

BSD process name corresponding to current thread: mdworker

Mac OS version:

12F37

Kernel version:

Darwin Kernel Version 12.5.0: Mon Jul 29 16:33:49 PDT 2013; root:xnu-2050.48.11~1/RELEASE_X86_64

Kernel UUID: B1B58405-A2B2-3C44-B25D-495053D52AB5

Kernel slide:     0x0000000009600000

Kernel text base: 0xffffff8009800000

System model name: MacBookPro9,2 (Mac-6F01561E16C75D06)

System uptime in nanoseconds: 537559311174

last loaded kext at 25821227147: com.apple.iokit.IOBluetoothSerialManager 4.1.7f2 (addr 0xffffff7f8a63d000, size 57344)

last unloaded kext at 168546631698: com.apple.driver.AppleFileSystemDriver 3.0.1 (addr 0xffffff7f8b52e000, size 8192)

loaded kexts:

tc.tctechnologies.driver.Saffire 4.1.0 15099

com.apple.iokit.IOBluetoothSerialManager 4.1.7f2

com.apple.driver.AudioAUUC 1.60

com.apple.driver.X86PlatformShim 1.0.0

com.apple.driver.AGPM 100.13.12

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleHDA 2.4.7fc2

com.apple.driver.AppleBacklight 170.3.5

com.apple.driver.AppleMikeyDriver 2.4.7fc2

com.apple.driver.AppleUpstreamUserClient 3.5.12

com.apple.driver.SMCMotionSensor 3.0.3d1

com.apple.driver.AppleMCCSControl 1.1.11

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.1.7f2

com.apple.driver.AppleSMCLMU 2.0.3d0

com.apple.driver.AppleLPC 1.6.3

com.apple.driver.AppleSMBusPCI 1.0.11d1

com.apple.driver.AppleIntelHD4000Graphics 8.1.6

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleIntelFramebufferCapri 8.1.6

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.ApplePolicyControl 3.4.5

com.apple.driver.AppleUSBTCButtons 237.1

com.apple.driver.AppleIRController 320.15

com.apple.driver.AppleUSBTCKeyboard 237.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 34

com.apple.iokit.SCSITaskUserClient 3.5.6

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.3.5

com.apple.driver.AppleUSBHub 623.4.4

com.apple.driver.AppleSDXC 1.4.3

com.apple.driver.AirPort.Brcm4331 615.20.17

com.apple.driver.AppleUSBXHCI 630.4.5

com.apple.driver.AppleFWOHCI 4.9.9

com.apple.iokit.AppleBCM5701Ethernet 3.6.2b4

com.apple.driver.AppleAHCIPort 2.6.6

com.apple.driver.AppleUSBEHCI 621.4.6

com.apple.driver.AppleACPIButtons 1.8

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.8

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 214.0.0

com.apple.nke.applicationfirewall 4.0.39

com.apple.security.quarantine 2.1

com.apple.driver.AppleIntelCPUPowerManagement 214.0.0

com.apple.iokit.IOSerialFamily 10.0.6

com.apple.driver.DspFuncLib 2.4.7fc2

com.apple.driver.X86PlatformPlugin 1.0.0

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.1.7f2

com.apple.driver.AppleSMBusController 1.0.11d1

com.apple.driver.AppleHDAController 2.4.7fc2

com.apple.iokit.IOHDAFamily 2.4.7fc2

com.apple.iokit.IOAcceleratorFamily 74.15

com.apple.driver.IOPlatformPluginFamily 5.4.1d11

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.kext.triggers 1.0

com.apple.iokit.IOAudioFamily 1.9.2fc7

com.apple.kext.OSvKernDSPLib 1.12

com.apple.iokit.IOSurface 86.0.4

com.apple.iokit.IOBluetoothFamily 4.1.7f2

com.apple.driver.AppleSMC 3.1.5d4

com.apple.driver.AppleGraphicsControl 3.4.5

com.apple.iokit.IONDRVSupport 2.3.7

com.apple.iokit.IOGraphicsFamily 2.3.7

com.apple.driver.AppleThunderboltDPInAdapter 2.5.0

com.apple.driver.AppleThunderboltDPAdapterFamily 2.5.0

com.apple.driver.AppleThunderboltPCIDownAdapter 1.3.2

com.apple.driver.AppleUSBMultitouch 237.3

com.apple.iokit.IOUSBHIDDriver 623.4.0

com.apple.driver.AppleUSBMergeNub 621.4.6

com.apple.driver.AppleUSBComposite 621.4.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.6

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOAHCISerialATAPI 2.5.5

com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.6

com.apple.iokit.IOUSBUserClient 630.4.4

com.apple.driver.AppleThunderboltNHI 1.9.2

com.apple.iokit.IOThunderboltFamily 2.7.7

com.apple.iokit.IO80211Family 530.5

com.apple.iokit.IOFireWireFamily 4.5.5

com.apple.iokit.IOEthernetAVBController 1.0.2b1

com.apple.iokit.IONetworkingFamily 3.0

com.apple.iokit.IOAHCIFamily 2.5.1

com.apple.iokit.IOUSBFamily 630.4.5

com.apple.driver.AppleEFINVRAM 2.0

com.apple.driver.AppleEFIRuntime 2.0

com.apple.iokit.IOHIDFamily 1.8.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 220.3

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.DiskImages 345

com.apple.iokit.IOStorageFamily 1.8

com.apple.driver.AppleKeyStore 28.21

com.apple.driver.AppleACPIPlatform 1.8

com.apple.iokit.IOPCIFamily 2.8

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0

Model: MacBookPro9,2, BootROM MBP91.00D3.B08, 2 processors, Intel Core i5, 2.5 GHz, 8 GB, SMC 2.2f38

Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In, 512 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x859B, 0x435435313236344246313630422E43313646

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x859B, 0x435435313236344246313630422E43313646

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (5.106.98.100.17)

Bluetooth: Version 4.1.7f2 12718, 3 service, 13 devices, 3 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: TOSHIBA MK5065GSXF, 500,11 GB

Serial ATA Device: HL-DT-ST DVDRW  GS31N

USB Device: USB Receiver, 0x046d  (Logitech Inc.), 0xc52f, 0x14200000 / 1

USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1d100000 / 2

USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0x1d180000 / 3

USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x1d182000 / 6

USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0253, 0x1d183000 / 5

USB Device: BRCM20702 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x1d181000 / 4

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821d, 0x1d181300 / 9

USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1a100000 / 2

USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0x1a110000 / 3