UPSTREAM: ext4: no need to continue when the number of entries is 1

commit 1a00a393 upstream.

Fixes: ac27a0ec ("[PATCH] ext4: initial copy of files from ext3")

Bug: 377605240

Reported-by:  <syzbot+ae688d469e36fb5138d0@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=ae688d469e36fb5138d0


Change-Id: Ic096de0e67ee65fe05de48a4333a8117c6384e5a
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Reported-and-tested-by:  <syzbot+ae688d469e36fb5138d0@syzkaller.appspotmail.com>
Link: https://patch.msgid.link/tencent_BE7AEE6C7C2D216CB8949CE8E6EE7ECC2C0A@qq.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 2d64e7da)