BTRFS info (device loop1): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
VFS: Busy inodes after unmount of loop1 (btrfs)
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kernel BUG at fs/super.c:652!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6487 Comm: syz-executor Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650
lr : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650
sp : ffff8000a36f7ba0
x29: ffff8000a36f7ba0 x28: 00007dfe9b15ef38 x27: ffff80008f301de8
x26: ffffffffffffffff x25: dfff800000000000 x24: 1fffe0001a1b00f0
x23: ffff80008b2817e0 x22: dfff800000000000 x21: 0000000000000000
x20: ffff80008fa4d4c0 x19: ffff0000d0d80000 x18: 00000000ffffffff
x17: ffff800092f13000 x16: ffff80008ada5d6c x15: 0000000000000001
x14: 1ffff000146deee0 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7000146deee1 x10: 0000000000ff0100 x9 : a5b6cbde78a5ae00
x8 : a5b6cbde78a5ae00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000a36f7538 x4 : ffff80008f3f4fa0 x3 : ffff800082faeee4
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000002f
Call trace:
 generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650 (P)
 kill_anon_super+0x4c/0x7c fs/super.c:1237
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2099
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xb0/0x150 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: b0051160 91350000 9119a261 97cfbb64 (d4210000) 
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