首先運行命令：adb remount然後adb shell dmesg -C grep avc<36>[ 113.241627]<0> (0)[281:logd.auditd]type=1400 audit(1438851627.212:214): avc: denied { ioctl } for pid=5684 comm="adbd" path="/dev/block/mmcblk0p20" dev="tmpfs" ino=317 scontext=u:r:adbd:s0 tcontext=u:object_r:platformblk_device:s0 tclass=blk_file permissive=0<36>[ 113.242282]<0> (0)[281:logd.auditd]type=1400 audit(1438851627.212:215): avc: denied { remount } for pid=5684 comm="adbd" scontext=u:r:adbd:s0 tcontext=u:object_r:labeledfs:s0 tclass=filesystem permissive=0<36>[ 113.242551]<0> (0)[281:logd.auditd]type=1400 audit(1438851627.212:216): avc: denied { sys_admin } for pid=5684 comm="adbd" capability=21 scontext=u:r:adbd:s0 tcontext=u:r:adbd:s0 tclass=capability permissive=0從日誌中，我們發現類型為labeledfs， 缺少權限remount所以要在策略中配置allow adbd labeledfs:filesystem remount;其他兩條類似
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