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BUG: KASAN: use-after-free in crc_itu_t+0x1d1/0x2a0 lib/crc-itu-t.c:60
Read of size 1 at addr ffff88806e8f2000 by task syz-executor.0/5358

CPU: 1 PID: 5358 Comm: syz-executor.0 Not tainted 6.4.0-rc4-syzkaller-00031-g8b817fded42d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:351 [inline]
 print_report+0x15f/0x540 mm/kasan/report.c:462
 kasan_report+0x172/0x1a0 mm/kasan/report.c:572
 crc_itu_t+0x1d1/0x2a0 lib/crc-itu-t.c:60
 udf_finalize_lvid fs/udf/super.c:1988 [inline]
 udf_sync_fs+0x1ce/0x380 fs/udf/super.c:2344
 sync_filesystem+0xe8/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:473
 kill_block_super+0x80/0xe0 fs/super.c:1407
 deactivate_locked_super+0xa0/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x260 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f61dd28d5d7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd2c70f458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f61dd28d5d7
RDX: 00007ffd2c70f529 RSI: 000000000000000a RDI: 00007ffd2c70f520
RBP: 00007ffd2c70f520 R08: 00000000ffffffff R09: 00007ffd2c70f2f0
R10: 0000555556dc6893 R11: 0000000000000246 R12: 00007f61dd2e6cdc
R13: 00007ffd2c7105e0 R14: 0000555556dc6810 R15: 00007ffd2c710620
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001ba3c80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x6e8f2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001ba3848 ffffea0001ba3808 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 5450, tgid 5450 (syz-executor.0), ts 82237888725, free_ts 82405183231
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1d2/0x1f0 mm/page_alloc.c:1731
 prep_new_page mm/page_alloc.c:1738 [inline]
 get_page_from_freelist+0x31f8/0x3370 mm/page_alloc.c:3502
 __alloc_pages+0x251/0x660 mm/page_alloc.c:4768
 __folio_alloc+0xf/0x30 mm/page_alloc.c:4800
 vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2240
 do_anonymous_page mm/memory.c:4085 [inline]
 do_pte_missing mm/memory.c:3645 [inline]
 handle_pte_fault mm/memory.c:4947 [inline]
 __handle_mm_fault mm/memory.c:5089 [inline]
 handle_mm_fault+0x2a9d/0x59e0 mm/memory.c:5243
 do_user_addr_fault arch/x86/mm/fault.c:1349 [inline]
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x260/0x8c0 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x8ee/0xa10 mm/page_alloc.c:2564
 free_unref_page_list+0x58e/0x830 mm/page_alloc.c:2705
 release_pages+0x275c/0x2a70 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
 tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:299
 zap_pte_range mm/memory.c:1514 [inline]
 zap_pmd_range mm/memory.c:1563 [inline]
 zap_pud_range mm/memory.c:1592 [inline]
 zap_p4d_range mm/memory.c:1613 [inline]
 unmap_page_range+0x2472/0x2a00 mm/memory.c:1634
 unmap_vmas+0x343/0x4d0 mm/memory.c:1719
 exit_mmap+0x251/0xac0 mm/mmap.c:3111
 __mmput+0x115/0x3c0 kernel/fork.c:1351
 exit_mm+0x223/0x300 kernel/exit.c:564
 do_exit+0x60e/0x2280 kernel/exit.c:858
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 get_signal+0x1709/0x17e0 kernel/signal.c:2874
 arch_do_signal_or_restart+0x8d/0x610 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x260 kernel/entry/common.c:297

Memory state around the buggy address:
 ffff88806e8f1f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806e8f1f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806e8f2000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88806e8f2080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806e8f2100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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