[ 11/89] s390/gup: add missing TASK_SIZE check to get_user_pages_fast()

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Heiko Carstens commit d55c4c613fc4d4ad2ba0fc6fa2b57176d420f7e4 upstream. When walking page tables we need to make sure that everything is within bounds of the ASCE limit of the task's address

[ 11/89] s390/gup: add missing TASK_SIZE check to get_user_pages_fast()

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Heiko Carstens heiko.carst...@de.ibm.com commit d55c4c613fc4d4ad2ba0fc6fa2b57176d420f7e4 upstream. When walking page tables we need to make sure that everything is within bounds of the ASCE