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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 ffff888070caa000 by task syz-executor250/3565

CPU: 0 PID: 3565 Comm: syz-executor250 Not tainted 6.1.37-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:395
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 crc_itu_t+0x1d1/0x2a0 lib/crc-itu-t.c:60
 udf_finalize_lvid fs/udf/super.c:2022 [inline]
 udf_sync_fs+0x1ce/0x380 fs/udf/super.c:2378
 sync_filesystem+0xe8/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:474
 kill_block_super+0x7a/0xe0 fs/super.c:1450
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 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+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3da0e57fc7
Code: 09 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd1e7fde8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000026219 RCX: 00007f3da0e57fc7
RDX: 00007fffd1e7fea7 RSI: 000000000000000a RDI: 00007fffd1e7fea0
RBP: 00007fffd1e7fea0 R08: 00000000ffffffff R09: 00007fffd1e7fc80
R10: 000055555720b633 R11: 0000000000000206 R12: 00007fffd1e80f10
R13: 000055555720b5f0 R14: 00007fffd1e7fe10 R15: 0000000000000005
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001c32a80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x70caa
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea0001c46248 ffffea0001c461c8 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 3569, tgid 3569 (syz-executor250), ts 155778954961, free_ts 155802993342
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533
 prep_new_page mm/page_alloc.c:2540 [inline]
 get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559
 __folio_alloc+0xf/0x30 mm/page_alloc.c:5591
 vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2241
 shmem_alloc_folio mm/shmem.c:1570 [inline]
 shmem_alloc_and_acct_folio+0x5a8/0xd50 mm/shmem.c:1594
 shmem_get_folio_gfp+0x13f0/0x3470 mm/shmem.c:1922
 shmem_get_folio mm/shmem.c:2053 [inline]
 shmem_write_begin+0x16e/0x4e0 mm/shmem.c:2540
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3754
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3882
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3914
 call_write_iter include/linux/fs.h:2205 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7ae/0xba0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1460 [inline]
 free_pcp_prepare mm/page_alloc.c:1510 [inline]
 free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388
 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530
 release_pages+0x2836/0x2b40 mm/swap.c:1055
 __pagevec_release+0x80/0xf0 mm/swap.c:1075
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 shmem_undo_range+0x867/0x2020 mm/shmem.c:944
 shmem_truncate_range mm/shmem.c:1043 [inline]
 shmem_evict_inode+0x265/0xa60 mm/shmem.c:1152
 evict+0x2a4/0x620 fs/inode.c:664
 __dentry_kill+0x436/0x650 fs/dcache.c:607
 dentry_kill+0xbb/0x290
 dput+0x1ef/0x420 fs/dcache.c:913
 __fput+0x5e4/0x890 fs/file_table.c:328
 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+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86

Memory state around the buggy address:
 ffff888070ca9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888070ca9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888070caa000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888070caa080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888070caa100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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