CVE-2023-53846 f2fs: fix to do sanity check on direct node in truncate_dnode()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on direct node in truncatednode syzbot reports below bug: BUG: KASAN: slab-use-after-free in f2fstruncatedatablocksrange+0x122a/0x14c0 fs/f2fs/file.c:574 Read of size 4 at addr ffff88802a25c000 by tas...