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BUG: KASAN: use-after-free in udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2039
Write of size 1 at addr ffff88808c36fb70 by task syz-executor.2/5035

CPU: 1 PID: 5035 Comm: syz-executor.2 Not tainted 6.4.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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:351 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:462
 kasan_report+0x176/0x1b0 mm/kasan/report.c:572
 udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2039
 udf_put_super+0xcd/0x160 fs/udf/super.c:2326
 generic_shutdown_super+0x134/0x340 fs/super.c:500
 kill_block_super+0x84/0xf0 fs/super.c:1407
 deactivate_locked_super+0xa4/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
 task_work_run+0x24a/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+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9f6c68d5d7
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:00007fffff24f258 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9f6c68d5d7
RDX: 00007fffff24f32c RSI: 000000000000000a RDI: 00007fffff24f320
RBP: 00007fffff24f320 R08: 00000000ffffffff R09: 00007fffff24f0f0
R10: 00005555561338ab R11: 0000000000000246 R12: 00007f9f6c6e6cdc
R13: 00007fffff2503e0 R14: 0000555556133810 R15: 00007fffff250420
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000230dbc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c36f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 ffffea000230dbc8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 9, migratetype Unmovable, gfp_mask 0x542dc0(GFP_USER|__GFP_NOWARN|__GFP_COMP|__GFP_ZERO|__GFP_ACCOUNT), pid 32235, tgid 32233 (syz-executor.2), ts 1369246979468, free_ts 1370145538574
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731
 prep_new_page mm/page_alloc.c:1738 [inline]
 get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768
 __get_free_pages+0xc/0x30 mm/page_alloc.c:4818
 io_mem_alloc io_uring/io_uring.c:2716 [inline]
 io_allocate_scq_urings+0x2ba/0x570 io_uring/io_uring.c:3706
 io_uring_create+0x67b/0xf20 io_uring/io_uring.c:3878
 io_uring_setup io_uring/io_uring.c:3975 [inline]
 __do_sys_io_uring_setup io_uring/io_uring.c:3981 [inline]
 __se_sys_io_uring_setup io_uring/io_uring.c:3978 [inline]
 __x64_sys_io_uring_setup+0x22e/0x2b0 io_uring/io_uring.c:3978
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 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:1302 [inline]
 free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2659
 io_ring_ctx_free+0x804/0xa60 io_uring/io_uring.c:2873
 io_ring_exit_work+0x7c1/0x850 io_uring/io_uring.c:3088
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff88808c36fa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808c36fa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88808c36fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff88808c36fb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88808c36fc00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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