CVE-2023-53616 jfs: fix invalid free of JFS_IP(ipimap)->i_imap in diUnmount

In the Linux kernel, the following vulnerability has been resolved: jfs: fix invalid free of JFSIPipimap-iimap in diUnmount syzbot found an invalid-free in diUnmount: BUG: KASAN: double-free in slabfree mm/slub.c:3661 inline BUG: KASAN: double-free in kmemcachefree+0x71/0x110 mm/slub.c:3674 Free ...