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BUG: KASAN: use-after-free in udf_close_lvid+0x67b/0x970 fs/udf/super.c:2072
Write of size 1 at addr ffff88802ed7a7f0 by task syz-executor.0/3661

CPU: 1 PID: 3661 Comm: syz-executor.0 Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x1f0 mm/kasan/report.c:395
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 udf_close_lvid+0x67b/0x970 fs/udf/super.c:2072
 udf_put_super+0xc9/0x160 fs/udf/super.c:2359
 generic_shutdown_super+0x130/0x310 fs/super.c:492
 kill_block_super+0x79/0xd0 fs/super.c:1428
 deactivate_locked_super+0xa7/0xf0 fs/super.c:332
 cleanup_mnt+0x494/0x520 fs/namespace.c:1186
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fee77c8d547
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:00007ffd884427f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fee77c8d547
RDX: 00007ffd884428cb RSI: 000000000000000a RDI: 00007ffd884428c0
RBP: 00007ffd884428c0 R08: 00000000ffffffff R09: 00007ffd88442690
R10: 000055555732a8b3 R11: 0000000000000246 R12: 00007fee77ce6b24
R13: 00007ffd88443980 R14: 000055555732a810 R15: 00007ffd884439c0
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000bb5e80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x2ed7a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000100 dead000000000122 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 13549, tgid 13547 (syz-executor.3), ts 526923014734, free_ts 528531697433
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4291
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5558
 __folio_alloc+0xf/0x30 mm/page_alloc.c:5590
 vma_alloc_folio+0x660/0xb60 mm/mempolicy.c:2246
 shmem_alloc_folio mm/shmem.c:1561 [inline]
 shmem_alloc_and_acct_folio+0x59b/0xd80 mm/shmem.c:1585
 shmem_get_folio_gfp+0xd00/0x36e0 mm/shmem.c:1913
 shmem_get_folio mm/shmem.c:2044 [inline]
 shmem_write_begin+0x133/0x480 mm/shmem.c:2531
 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3753
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3881
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3913
 call_write_iter include/linux/fs.h:2199 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7dc/0xc50 fs/read_write.c:584
 ksys_write+0x177/0x2a0 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:1459 [inline]
 free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page_list+0xb4/0x7b0 mm/page_alloc.c:3529
 release_pages+0x232a/0x25c0 mm/swap.c:1055
 __pagevec_release+0x7d/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+0x89a/0x2260 mm/shmem.c:946
 shmem_truncate_range mm/shmem.c:1034 [inline]
 shmem_evict_inode+0x27f/0xab0 mm/shmem.c:1143
 evict+0x2a4/0x620 fs/inode.c:664
 __dentry_kill+0x3b1/0x5b0 fs/dcache.c:607
 dentry_kill+0xbb/0x290
 dput+0x1f3/0x410 fs/dcache.c:913
 __fput+0x5e4/0x880 fs/file_table.c:328
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86

Memory state around the buggy address:
 ffff88802ed7a680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88802ed7a700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88802ed7a780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff88802ed7a800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88802ed7a880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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