VFS: Busy inodes after unmount of loop4 (iso9660)
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kernel BUG at fs/super.c:653!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6536 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651
lr : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651
sp : ffff8000a4fc7bd0
x29: ffff8000a4fc7bd0 x28: 00007dfeb3207ae0 x27: ffff80008f7f2030
x26: ffffffffffffffff x25: dfff800000000000 x24: 1fffe0001acb20f1
x23: ffff80008b256560 x22: dfff800000000000 x21: 0000000000000000
x20: ffff80008fbf1d80 x19: ffff0000d6590000 x18: 00000000ffffffff
x17: ffff800080d77f70 x16: ffff80008b021030 x15: 0000000000000001
x14: 1ffff000149f8ef0 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7000149f8ef1 x10: 0000000000ff0100 x9 : 2ab5b6d2653caa00
x8 : 2ab5b6d2653caa00 x7 : ffff800080565b6c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807e08b4
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000031
Call trace:
 generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651 (P)
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xc4/0x12c fs/super.c:474
 deactivate_super+0xe0/0x100 fs/super.c:507
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xfc/0x168 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: d00522a0 91390000 9119c261 97ce35cf (d4210000) 
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