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BUG: KASAN: use-after-free in crc_itu_t+0x21c/0x2a0 lib/crc-itu-t.c:60
Read of size 1 at addr ffff88803ab94000 by task syz-executor.0/6414

CPU: 0 PID: 6414 Comm: syz-executor.0 Not tainted 6.7.0-rc1-syzkaller-00125-g7475e51b8796 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x142/0x170 mm/kasan/report.c:588
 crc_itu_t+0x21c/0x2a0 lib/crc-itu-t.c:60
 udf_finalize_lvid fs/udf/super.c:1984 [inline]
 udf_sync_fs+0x1d2/0x380 fs/udf/super.c:2340
 iterate_supers+0xc2/0x180 fs/super.c:971
 ksys_sync+0xcc/0x1c0 fs/sync.c:103
 __do_sys_sync+0xe/0x20 fs/sync.c:113
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fb48027cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb4810990c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fb48039c050 RCX: 00007fb48027cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fb4802c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb48039c050 R15: 00007ffe966c99a8
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000eae500 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x3ab94
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffff7f(buddy)
raw: 00fff00000000000 ffffea0000e9a208 ffffea0000eaf608 0000000000000000
raw: 0000000000000001 0000000000000002 00000000ffffff7f 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 6407, tgid 6406 (syz-executor.3), ts 230606438966, free_ts 231427687194
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
 __alloc_pages+0x255/0x680 mm/page_alloc.c:4568
 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
 vma_alloc_folio+0xf3/0x3f0 mm/mempolicy.c:2172
 do_anonymous_page mm/memory.c:4171 [inline]
 do_pte_missing mm/memory.c:3728 [inline]
 handle_pte_fault mm/memory.c:5038 [inline]
 __handle_mm_fault mm/memory.c:5179 [inline]
 handle_mm_fault+0x238a/0x6680 mm/memory.c:5344
 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 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:1137 [inline]
 free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
 free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533
 release_pages+0x2117/0x2400 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x34c/0x4e0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:392
 unmap_region+0x300/0x350 mm/mmap.c:2341
 do_vmi_align_munmap+0x1223/0x1860 mm/mmap.c:2657
 do_vmi_munmap+0x24d/0x2d0 mm/mmap.c:2725
 __vm_munmap+0x230/0x450 mm/mmap.c:3012
 __do_sys_munmap mm/mmap.c:3029 [inline]
 __se_sys_munmap mm/mmap.c:3026 [inline]
 __x64_sys_munmap+0x69/0x80 mm/mmap.c:3026
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff88803ab93f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803ab93f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803ab94000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88803ab94080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88803ab94100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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