Hey curio,

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


MOD EDIT: Removed attached download, as it is out of date compared to the linked download
Need stuff done? Give me a shout, maybe I can help: http://www.mobile-dev.co.za/