ext4: fix possible double unlock when moving a directory

stable inclusion
from stable-v5.10.176
commit 020166bc6669ca9fb267ebd96bd88c4fb64a5d46
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8CHVQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=020166bc6669ca9fb267ebd96bd88c4fb64a5d46

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

commit 70e42fea upstream.

Fixes: 0813299c ("ext4: Fix possible corruption when moving a directory")
Link: https://lore.kernel.org/r/5efbe1b9-ad8b-4a4f-b422-24824d2b775c@kili.mountain


Reported-by: Dan Carpenter <error27@gmail.com>
Reported-by:  <syzbot+0c73d1d8b952c5f3d714@syzkaller.appspotmail.com>
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>