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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 ffff88814a206138 by task syz-executor.3/7508

CPU: 1 PID: 7508 Comm: syz-executor.3 Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #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+0xa8a/0x2ad0 kernel/exit.c:869
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1018
 get_signal+0x23b5/0x2790 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:89
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f898f2a8135
Code: Unable to access opcode bytes at 0x7f898f2a810b.
RSP: 002b:00007f899006d010 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f898f3abf80 RCX: 00007f898f2a8135
RDX: 00007f899006d050 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f898f2c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f898f3abf80 R15: 00007ffed0f60698
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0005288180 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14a206
flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 057ff00000000000 0000000000000000 ffffea0005288188 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 8, migratetype Unmovable, gfp_mask 0x1521c2(__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO|__GFP_HARDWALL), pid 11906, tgid 11905 (syz-executor.0), ts 235057021195, free_ts 235337834003
 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
 alloc_largest_available drivers/dma-buf/heaps/system_heap.c:326 [inline]
 system_heap_allocate+0x272/0xf70 drivers/dma-buf/heaps/system_heap.c:371
 dma_heap_buffer_alloc drivers/dma-buf/dma-heap.c:67 [inline]
 dma_heap_ioctl_allocate drivers/dma-buf/dma-heap.c:111 [inline]
 dma_heap_ioctl+0x33e/0x690 drivers/dma-buf/dma-heap.c:171
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 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_pages_ok+0x60a/0xc50 mm/page_alloc.c:1267
 system_heap_dma_buf_release+0x168/0x260 drivers/dma-buf/heaps/system_heap.c:295
 dma_buf_release+0x153/0x2c0 drivers/dma-buf/dma-buf.c:79
 __dentry_kill+0x423/0x640 fs/dcache.c:612
 dentry_kill fs/dcache.c:733 [inline]
 dput+0x7eb/0xd90 fs/dcache.c:913
 __fput+0x3b9/0xb70 fs/file_table.c:402
 __fput_sync+0x47/0x50 fs/file_table.c:475
 __do_sys_close fs/open.c:1587 [inline]
 __se_sys_close fs/open.c:1572 [inline]
 __x64_sys_close+0x87/0xf0 fs/open.c:1572
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff88814a206000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88814a206080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88814a206100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                        ^
 ffff88814a206180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88814a206200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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