ios App crashes with EXC_BAD_ACCESS (SIGSEGV) on ipad ios 7.1.1 device

I have no idea about this crash. The crash happens at various screens without any actions sometimes. Any help would be appreciated. Thanks in advance.

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000c
Triggered by Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib                 0x3b3a1626 objc_msgSend + 6
1   UIKit                           0x33301b46 +[UIViewController _viewControllerForFullScreenPresentationFromView:] + 174
2   UIKit                           0x33301614 -[UIWindow _scrollToTopViewsUnderScreenPointIfNecessary:resultHandler:] + 428
3   UIKit                           0x3330143e -[_UIScrollsToTopInitiatorView touchesEnded:withEvent:] + 210
4   UIKit                           0x3330134e -[UIStatusBar touchesEnded:withEvent:] + 334
5   UIKit                           0x33255790 forwardTouchMethod + 228
6   UIKit                           0x3310371c -[UIWindow _sendTouchesForEvent:] + 524
7   UIKit                           0x330fe6e6 -[UIWindow sendEvent:] + 754
8   UIKit                           0x330d38e8 -[UIApplication sendEvent:] + 192
9   UIKit                           0x330d1f92 _UIApplicationHandleEventQueue + 7098
10  CoreFoundation                  0x3087e258 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12
11  CoreFoundation                  0x3087d726 __CFRunLoopDoSources0 + 202
12  CoreFoundation                  0x3087bf1a __CFRunLoopRun + 618
13  CoreFoundation                  0x307e6f0a CFRunLoopRunSpecific + 518
14  CoreFoundation                  0x307e6cee CFRunLoopRunInMode + 102
15  GraphicsServices                0x356e065e GSEventRunModal + 134
16  UIKit                           0x33132168 UIApplicationMain + 1132
17  MyApp                           0x0029c0a0 main (main.m:16)
18  libdyld.dylib                   0x3b8a4ab4 start + 0