comm=“UnityMain” reason=“memory violation” sig=11

my unity app does not crash on nexus 5.1.1 , and other android below 5.0 . my unity app crash on android 5.0.1 , the log show '01-26 14:23:05.241: E/audit(6373): type=1701 msg=audit(1453789385.241:2288): auid=4294967295 uid=10129 gid=10129 ses=4294967295 subj=u:r:s_untrusted_app:s0 pid=9698 comm="UnityMain" reason="memory violation" sig=11' my unity version is 4.6.2 . does everyone know why throws this exception and crash ?