Mac Book Pro goes dark-what does this error message mean?

Interval Since Last Panic Report: 1210861 sec

Panics Since Last Report: 2

Anonymous UUID: B6C83815-2E63-4934-B0D6-258F601943F9

Tue May 12 14:51:52 2015

panic(cpu 2 caller 0xffffff7f80966007): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff811408e000 0x0a5480a2, D0, P3/4

Backtrace (CPU 2), Frame : Return Address

0xffffff811786afa0 : 0xffffff8000220792

0xffffff811786b020 : 0xffffff7f80966007

0xffffff811786b0b0 : 0xffffff7f80a5eb83

0xffffff811786b110 : 0xffffff7f80a5ebf7

0xffffff811786b180 : 0xffffff7f80d60855

0xffffff811786b2c0 : 0xffffff7f80a82ddd

0xffffff811786b2f0 : 0xffffff7f8096fd6a

0xffffff811786b3a0 : 0xffffff7f8096b43c

0xffffff811786b590 : 0xffffff7f8096c668

0xffffff811786b660 : 0xffffff7f81e714d9

0xffffff811786b720 : 0xffffff7f81ea6eb6

0xffffff811786b7b0 : 0xffffff7f81e89e99

0xffffff811786b810 : 0xffffff7f81e8a2d1

0xffffff811786b860 : 0xffffff7f81e8a694

0xffffff811786b8f0 : 0xffffff7f81e8b4ed

0xffffff811786b930 : 0xffffff7f81e472a1

0xffffff811786baa0 : 0xffffff7f81e8bd6d

0xffffff811786bb60 : 0xffffff7f81e44346

0xffffff811786bbc0 : 0xffffff8000655f3e

0xffffff811786bbe0 : 0xffffff800065681a

0xffffff811786bc40 : 0xffffff8000656fbb

0xffffff811786bd80 : 0xffffff80002a3f08

0xffffff811786be80 : 0xffffff8000223096

0xffffff811786beb0 : 0xffffff80002148a9

0xffffff811786bf10 : 0xffffff800021bbd8

0xffffff811786bf70 : 0xffffff80002aef10

0xffffff811786bfb0 : 0xffffff80002daec3

Kernel Extensions in backtrace:

com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 ff000->0xffffff7f80bfafff

dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f80889000

dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f808ed000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f808b4000

com.apple.nvidia.nv50hal(7.3.2)[38ACBB3D-4E3C-3883-9A4B-67F15592905F]@0xffffff7 f80bfb000->0xffffff7f80f1dfff

dependency: com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 ff000

dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f80889000

com.apple.GeForce(7.3.2)[7E1D7726-416F-3716-ACCB-E1E276E35002]@0xffffff7f81e390 00->0xffffff7f81efbfff

dependency: com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 ff000

dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f808ed000

dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f80889000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f808b4000

BSD process name corresponding to current thread: WindowServer

Mac OS version:

11G63

Kernel version:

Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64

Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5

System model name: MacBookPro6,2 (Mac-F22586C8)

System uptime in nanoseconds: 45050946784600

last loaded kext at 25084410105497: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f807ce000, size 16384)

last unloaded kext at 25150100203212: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f807ce000, size 12288)

loaded kexts:

com.zeobit.kext.Firewall 2.3.3

com.apple.filesystems.smbfs 1.7.2

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AudioAUUC 1.59

com.apple.driver.AppleHDA 2.2.5a5

com.apple.driver.AppleMikeyDriver 2.2.5a5

com.apple.driver.AGPM 100.12.75

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.iokit.IOBluetoothSerialManager 4.0.8f17

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AudioIPCDriver 1.2.3

com.apple.driver.AppleUpstreamUserClient 3.5.9

com.apple.driver.ApplePolicyControl 3.1.33

com.apple.driver.SMCMotionSensor 3.0.2d6

com.apple.driver.AppleSMCPDRC 5.0.0d8

com.apple.GeForce 7.3.2

com.apple.driver.AppleSMCLMU 2.0.1d2

com.apple.driver.AppleMuxControl 3.1.33

com.apple.driver.ACPI_SMC_PlatformPlugin 5.0.0d8

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.AppleMCCSControl 1.0.33

com.apple.driver.AppleIntelHDGraphics 7.3.2

com.apple.driver.AppleIntelHDGraphicsFB 7.3.2

com.apple.driver.AppleUSBTCButtons 227.6

com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17

com.apple.driver.AppleUSBTCKeyboard 227.6

com.apple.driver.AppleIRController 312

com.apple.driver.AppleUSBCardReader 3.0.6

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 33

com.apple.iokit.SCSITaskUserClient 3.2.1

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCISerialATAPI 2.0.3

com.apple.iokit.IOAHCIBlockStorage 2.1.0

com.apple.driver.AppleUSBHub 5.1.0

com.apple.driver.AirPort.Brcm4331 561.7.22

com.apple.iokit.AppleBCM5701Ethernet 3.2.4b8

com.apple.driver.AppleEFINVRAM 1.6.1

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleFWOHCI 4.9.0

com.apple.driver.AppleAHCIPort 2.3.1

com.apple.driver.AppleUSBEHCI 5.1.0

com.apple.driver.AppleACPIButtons 1.5

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.7

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.5

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0

com.apple.nke.applicationfirewall 3.2.30

com.apple.security.quarantine 1.4

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 195.0.0

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 2.2.5a5

com.apple.iokit.IOSurface 80.0.2

com.apple.iokit.IOSerialFamily 10.0.5

com.apple.iokit.IOAudioFamily 1.8.6fc18

com.apple.kext.OSvKernDSPLib 1.3

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleHDAController 2.2.5a5

com.apple.iokit.IOHDAFamily 2.2.5a5

com.apple.driver.AppleGraphicsControl 3.1.33

com.apple.driver.AppleSMC 3.1.3d10

com.apple.driver.IOPlatformPluginLegacy 5.0.0d8

com.apple.driver.AppleSMBusPCI 1.0.10d0

com.apple.nvidia.nv50hal 7.3.2

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.driver.IOPlatformPluginFamily 5.1.1d6

com.apple.driver.AppleSMBusController 1.0.10d0

com.apple.NVDAResman 7.3.2

com.apple.iokit.IONDRVSupport 2.3.4

com.apple.iokit.IOGraphicsFamily 2.3.4

com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17

com.apple.iokit.IOBluetoothFamily 4.0.8f17

com.apple.driver.AppleUSBMultitouch 230.5

com.apple.iokit.IOUSBHIDDriver 5.0.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.2.1

com.apple.iokit.IOUSBMassStorageClass 3.0.3

com.apple.driver.AppleUSBMergeNub 5.1.0

com.apple.driver.AppleUSBComposite 5.0.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.2.1

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1

com.apple.iokit.IOUSBUserClient 5.0.0

com.apple.iokit.IO80211Family 420.3

com.apple.iokit.IOEthernetAVBController 1.0.1b1

com.apple.iokit.IONetworkingFamily 2.1

com.apple.iokit.IOFireWireFamily 4.4.8

com.apple.iokit.IOAHCIFamily 2.0.8

com.apple.iokit.IOUSBFamily 5.1.0

com.apple.driver.AppleEFIRuntime 1.6.1

com.apple.iokit.IOHIDFamily 1.7.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 177.11

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 331.7

com.apple.iokit.IOStorageFamily 1.7.2

com.apple.driver.AppleKeyStore 28.18

com.apple.driver.AppleACPIPlatform 1.5

com.apple.iokit.IOPCIFamily 2.7

com.apple.iokit.IOACPIFamily 1.4