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BUG: KASAN: use-after-free in udf_close_lvid+0x508/0x5c0 fs/udf/super.c:2035
Write of size 1 at addr ffff888062957f38 by task syz-executor.2/10257

CPU: 1 PID: 10257 Comm: syz-executor.2 Not tainted 6.7.0-rc2-syzkaller-00206-gb46ae77f6787 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 udf_close_lvid+0x508/0x5c0 fs/udf/super.c:2035
 udf_put_super+0x19c/0x200 fs/udf/super.c:2322
 generic_shutdown_super+0x161/0x3d0 fs/super.c:696
 kill_block_super+0x3b/0x90 fs/super.c:1667
 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
 deactivate_super+0xde/0x100 fs/super.c:517
 cleanup_mnt+0x222/0x450 fs/namespace.c:1256
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa92/0x2ae0 kernel/exit.c:871
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
 get_signal+0x23be/0x2790 kernel/signal.c:2904
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fca806a7ef5
Code: Unable to access opcode bytes at 0x7fca806a7ecb.
RSP: 002b:00007fca8141f010 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fca8079bf80 RCX: 00007fca806a7ef5
RDX: 00007fca8141f050 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fca806c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007fca8079bf80 R15: 00007ffdaf2b32a8
 </TASK>

The buggy address belongs to the physical page:
page:ffffea00018a55c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x62957
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
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 0x100cca(GFP_HIGHUSER_MOVABLE), pid 30113, tgid 30112 (syz-executor.1), ts 2455926191147, free_ts 2456093960343
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312
 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568
 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
 shmem_alloc_folio+0x10d/0x140 mm/shmem.c:1613
 shmem_alloc_and_add_folio+0x147/0x7b0 mm/shmem.c:1653
 shmem_get_folio_gfp+0x623/0x1360 mm/shmem.c:2037
 shmem_get_folio mm/shmem.c:2119 [inline]
 shmem_write_begin+0x15a/0x360 mm/shmem.c:2702
 generic_perform_write+0x278/0x600 mm/filemap.c:3918
 shmem_file_write_iter+0x110/0x140 mm/shmem.c:2878
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x64f/0xdf0 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
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+0x4fa/0xaa0 mm/page_alloc.c:2347
 free_unref_page_list+0xe6/0xb40 mm/page_alloc.c:2533
 release_pages+0x32a/0x14f0 mm/swap.c:1042
 __folio_batch_release+0x77/0xe0 mm/swap.c:1062
 folio_batch_release include/linux/pagevec.h:83 [inline]
 shmem_undo_range+0x57a/0x1030 mm/shmem.c:1004
 shmem_truncate_range mm/shmem.c:1096 [inline]
 shmem_evict_inode+0x39f/0xba0 mm/shmem.c:1224
 evict+0x2ed/0x6b0 fs/inode.c:666
 iput_final fs/inode.c:1777 [inline]
 iput.part.0+0x560/0x7b0 fs/inode.c:1803
 iput+0x5c/0x80 fs/inode.c:1793
 dentry_unlink_inode+0x292/0x430 fs/dcache.c:401
 __dentry_kill+0x3b8/0x640 fs/dcache.c:607
 dentry_kill fs/dcache.c:733 [inline]
 dput+0x7eb/0xd90 fs/dcache.c:913
 __fput+0x3b9/0xbb0 fs/file_table.c:402
 __fput_sync+0x47/0x50 fs/file_table.c:475
 __do_sys_close fs/open.c:1590 [inline]
 __se_sys_close fs/open.c:1575 [inline]
 __x64_sys_close+0x87/0xf0 fs/open.c:1575
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82

Memory state around the buggy address:
 ffff888062957e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888062957e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888062957f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                        ^
 ffff888062957f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888062958000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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