No need, here is a very quickly put together app in 5 mins that lets you toggle on/off world writability to /dev/exynos-mem
So you can toggle the fix off if you want to use the camera, then toggle it back on afterwards.
Github source: https://github.com/Ryan-ZA/exynosfix
APK Download: https://github.com/Ryan-ZA/exynosfix.../exynosfix.apk
download, as it is out of date compared to the linked
Need stuff done? Give me a shout, maybe I can help: http://www.mobile-dev.co.za/