[PATCH 4.9 095/101] f2fs: fix to do sanity check with node footer and iblocks

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chao Yu commit e34438c903b653daca2b2a7de95aed46226f8ed3 upstream. This patch adds to do sanity check with below fields of inode to avoid reported panic. - node footer - iblocks

[PATCH 4.9 095/101] f2fs: fix to do sanity check with node footer and iblocks

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chao Yu commit e34438c903b653daca2b2a7de95aed46226f8ed3 upstream. This patch adds to do sanity check with below fields of inode to avoid reported panic. - node footer - iblocks