memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5002 'syz-executor206'
loop0: detected capacity change from 0 to 2048
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
==================================================================
BUG: KASAN: use-after-free in udf_close_lvid.isra.0+0x4a7/0x550 fs/udf/super.c:2039
Write of size 1 at addr ffff8880900e2790 by task syz-executor206/5002

CPU: 0 PID: 5002 Comm: syz-executor206 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:571
 udf_close_lvid.isra.0+0x4a7/0x550 fs/udf/super.c:2039
 udf_put_super+0x1bb/0x230 fs/udf/super.c:2326
 generic_shutdown_super+0x158/0x480 fs/super.c:500
 kill_block_super+0xa1/0x100 fs/super.c:1407
 deactivate_locked_super+0x98/0x160 fs/super.c:331
 deactivate_super+0xb1/0xd0 fs/super.c:362
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xb0d/0x29f0 kernel/exit.c:871
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f845befeea9
Code: Unable to access opcode bytes at 0x7f845befee7f.
RSP: 002b:00007fff3eda5af8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f845bf743f0 RCX: 00007f845befeea9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f845bf6ee40
R10: 0000000000010001 R11: 0000000000000246 R12: 00007f845bf743f0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0002403880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x900e2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0002403888 ffffea0002403888 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff8880900e2680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880900e2700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8880900e2780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff8880900e2800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880900e2880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================