[PATCH 3.19.y-ckt 110/128] ovl: fix permission checking for setattr

3.19.8-ckt12 -stable review patch. If anyone has any objections, please let me know. -- From: Miklos Szeredi commit acff81ec2c79492b180fade3c2894425cd35a545 upstream. [Al Viro] The bug is in being too enthusiastic about optimizing ->setattr() away - instead of "copy verbatim

[PATCH 3.19.y-ckt 110/128] ovl: fix permission checking for setattr

3.19.8-ckt12 -stable review patch. If anyone has any objections, please let me know. -- From: Miklos Szeredi commit acff81ec2c79492b180fade3c2894425cd35a545 upstream. [Al Viro] The bug is in being too enthusiastic about optimizing ->setattr() away -