My Application Crashes While Running In Background

Exception Type:  00000020
 Exception Codes: 0x8badf00d
 Highlighted Thread:  0

Application Specific Information:

   GpsDemo[162] has active assertions beyond permitted time: 
{(
     <SBProcessAssertion: 0x8f585c0> identifier: CoreLocationBackgroundClient process:              GpsDemo[162] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:162 preventSuspend  preventIdleSleep 
       )}

Elapsed total CPU time (seconds): 6.670 (user 2.850, system 3.820), 1% CPU 
Elapsed application CPU time (seconds): 0.090, 0% CPU

Thread 0:
0   libSystem.B.dylib               0x00000c98 mach_msg_trap + 20
1   libSystem.B.dylib               0x00002d64 mach_msg + 44
2   CoreFoundation                  0x00027c38 __CFRunLoopServiceMachPort + 88
3   CoreFoundation                  0x000274c2 __CFRunLoopRun + 350
4   CoreFoundation                  0x00027270 CFRunLoopRunSpecific + 224
5   CoreFoundation                  0x00027178 CFRunLoopRunInMode + 52
6   GraphicsServices                0x000045ec GSEventRunModal + 108
7   GraphicsServices                0x00004698 GSEventRun + 56
8   UIKit                           0x0000411c -[UIApplication _run] + 396
9   UIKit                           0x00002128 UIApplicationMain + 664
10  GpsDemo                         0x00002154 0x1000 + 4436
11  GpsDemo                         0x00002108 0x1000 + 4360

Thread 1:
0   libSystem.B.dylib               0x0002d330 kevent + 24
1   libSystem.B.dylib               0x000d6b6c _dispatch_mgr_invoke + 88
2   libSystem.B.dylib               0x000d65bc _dispatch_queue_invoke + 96
3   libSystem.B.dylib               0x000d675c _dispatch_worker_thread2 + 120
4   libSystem.B.dylib               0x0007a67a _pthread_wqthread + 258
5   libSystem.B.dylib               0x00073190 start_wqthread + 0

Thread 2:
0   libSystem.B.dylib               0x00000c98 mach_msg_trap + 20
1   libSystem.B.dylib               0x00002d64 mach_msg + 44
2   CoreFoundation                  0x00027c38 __CFRunLoopServiceMachPort + 88
3   CoreFoundation                  0x000274c2 __CFRunLoopRun + 350
4   CoreFoundation                  0x00027270 CFRunLoopRunSpecific + 224
5   CoreFoundation                  0x00027178 CFRunLoopRunInMode + 52
6   WebCore                         0x000024e2 RunWebThread(void*) + 362
7   libSystem.B.dylib               0x0007a27e _pthread_start + 242
8   libSystem.B.dylib               0x0006f2a8 thread_start + 0

Unknown thread crashed with unknown flavor: 5, state_count: 1

Binary Images:
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This is the crash report I am getting for my application.My application is running in background and is sending GPS data to web service.

Application Specific Information: GpsDemo[162] has active assertions beyond permitted time: {( identifier: CoreLocationBackgroundClient process: GpsDemo[162] permittedBackgroundDuration: 600.000000 

It looks like your application isn't allowed to run longer than 600 seconds in background.