permission issues on dhcp file...
Most probably the root cause is a permission issues on that particular file after upgrade... Should not happen anymore in the future.
[ Old devices
] HD2, HTC Wildfire, Galaxy Nexus, Galaxy S, S2, S3, S4 quad/octa, S5 octa, Note, Note 2, HTC One, Xperia Z, Nexus 4, Padfone 2, TF101, TF700, TF701, IdeaPad A2109, HTC Sensation, Galaxy Tab S 10.5
[ Current devices
] Nexus 5, Nexus 7 2012, Nexus 7 2013, Note 3, Note 3 Neo
] 3C Toolbox
, System Tuner
, Battery Monitor Widget