VFS: Busy inodes after unmount of loop7 (iso9660)
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kernel BUG at fs/super.c:650!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 9043 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:generic_shutdown_super+0x2e9/0x390 fs/super.c:650
Code: 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 00 00 48 8b 55 00 48 8d b3 68 06 00 00 48 c7 c7 60 88 9f 8b e8 08 03 64 ff 90 <0f> 0b e8 b0 41 ed ff e9 3c fd ff ff 4c 89 ef e8 a3 41 ed ff e9 d0
RSP: 0018:ffffc90004a9fd88 EFLAGS: 00010282
RAX: 0000000000000031 RBX: ffff88803107e000 RCX: ffffffff819acb09
RDX: 0000000000000000 RSI: ffffffff819b4636 RDI: 0000000000000005
RBP: ffffffff8e703c40 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88803107e780
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88803083b380
FS:  000055556bd56500(0000) GS:ffff888124ade000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff56d96b68 CR3: 00000000356ac000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kill_block_super+0x3b/0x90 fs/super.c:1722
 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473
 deactivate_super fs/super.c:506 [inline]
 deactivate_super+0xde/0x100 fs/super.c:502
 cleanup_mnt+0x225/0x450 fs/namespace.c:1327
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69de7901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 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 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe6d1d3c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f69de811d7d RCX: 00007f69de7901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe6d1d3d40
RBP: 00007ffe6d1d3d40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe6d1d4dd0
R13: 00007f69de811d7d R14: 00000000000acedb R15: 00007ffe6d1d4e10
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x2e9/0x390 fs/super.c:650
Code: 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 00 00 48 8b 55 00 48 8d b3 68 06 00 00 48 c7 c7 60 88 9f 8b e8 08 03 64 ff 90 <0f> 0b e8 b0 41 ed ff e9 3c fd ff ff 4c 89 ef e8 a3 41 ed ff e9 d0
RSP: 0018:ffffc90004a9fd88 EFLAGS: 00010282
RAX: 0000000000000031 RBX: ffff88803107e000 RCX: ffffffff819acb09
RDX: 0000000000000000 RSI: ffffffff819b4636 RDI: 0000000000000005
RBP: ffffffff8e703c40 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88803107e780
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88803083b380
FS:  000055556bd56500(0000) GS:ffff8881249de000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcaaabb3ad8 CR3: 00000000356ac000 CR4: 0000000000350ef0