ext4: add EA_INODE checking to ext4_iget()

stable inclusion
from stable-v5.10.183
commit 6d67d4966c1e7fda765d877315caa372493fe838
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8IRR2

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6d67d4966c1e7fda765d877315caa372493fe838



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

commit b3e6bcb9 upstream.

Add a new flag, EXT4_IGET_EA_INODE which indicates whether the inode
is expected to have the EA_INODE flag or not.  If the flag is not
set/clear as expected, then fail the iget() operation and mark the
file system as corrupted.

This commit also makes the ext4_iget() always perform the
is_bad_inode() check even when the inode is already inode cache.  This
allows us to remove the is_bad_inode() check from the callers of
ext4_iget() in the ea_inode code.

Reported-by:  <syzbot+cbb68193bdb95af4340a@syzkaller.appspotmail.com>
Reported-by:  <syzbot+62120febbd1ee3c3c860@syzkaller.appspotmail.com>
Reported-by:  <syzbot+edce54daffee36421b4c@syzkaller.appspotmail.com>
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20230524034951.779531-2-tytso@mit.edu


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>