From: Daeho Jeong <daehojeong@xxxxxxxxxx>
To fix a race condition between atomic write aborts, I use the inode
lock and make COW inode to be re-usable thoroughout the whole
atomic file inode lifetime.
Reported-by: syzbot+823000d23b3400619f7c@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 3db1de0e582c ("f2fs: change the current atomic write way")
Signed-off-by: Daeho Jeong <daehojeong@xxxxxxxxxx>