VFS: Busy inodes after unmount of loop3 (iso9660)
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kernel BUG at fs/super.c:505!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4329 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : generic_shutdown_super+0x320/0x324 fs/super.c:503
lr : generic_shutdown_super+0x320/0x324 fs/super.c:503
sp : ffff8000207579a0
x29: ffff8000207579a0 x28: 1ffff00002a17aa8 x27: dfff800000000000
x26: 0000000000000002 x25: 0000000000000002 x24: 1fffe0001f27acfb
x23: dfff800000000000 x22: ffff800011c046c0 x21: 0000000000000000
x20: ffff80001546f0e0 x19: ffff0000f93d6000 x18: ffff800011abbcc0
x17: ffff8000181f8000 x16: ffff8000082d22e0 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100
x11: ff00800008309fc0 x10: 0000000000000000 x9 : df2f4269b7f85900
x8 : df2f4269b7f85900 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020757478 x4 : ffff8000151a4820 x3 : ffff80000852e158
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000031
Call trace:
 generic_shutdown_super+0x320/0x324 fs/super.c:503
 kill_block_super+0x70/0xdc fs/super.c:1470
 deactivate_locked_super+0xac/0x124 fs/super.c:332
 deactivate_super+0xe8/0x108 fs/super.c:363
 cleanup_mnt+0x37c/0x404 fs/namespace.c:1182
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1189
 task_work_run+0x1ec/0x270 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 90048ec0 91088000 911aa261 95d93be2 (d4210000) 
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