quota: Sanity-check quota file headers on load

mainline inclusion
from mainline-5.11-rc1
commit 11c514a9
category: bugfix
bugzilla: 49668
CVE: NA

---------------------------

Perform basic sanity checks of quota headers to avoid kernel crashes on
corrupted quota files.

CC: stable@vger.kernel.org
Reported-by:  <syzbot+f816042a7ae2225f25ba@syzkaller.appspotmail.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>