BTRFS info (device loop4): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d assertion failed: list_empty(&fs_info->delayed_iputs), in fs/btrfs/disk-io.c:4718 ------------[ cut here ]------------ kernel BUG at fs/btrfs/ctree.h:3717! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4294 Comm: syz-executor Not tainted 6.1.116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : assertfail+0x28/0x2c fs/btrfs/ctree.h:3716 lr : assertfail+0x28/0x2c fs/btrfs/ctree.h:3716 sp : ffff8000210f76d0 x29: ffff8000210f76d0 x28: 1fffe0001a8b8262 x27: dfff800000000000 x26: ffff70000421eee8 x25: 1fffe0001a8b81fa x24: ffff8000210f7740 x23: 0000000000000000 x22: ffff0000d45c0fc8 x21: ffff0000d45c0d58 x20: ffff0000d45c0010 x19: ffff0000d45c0000 x18: 1fffe000367a2f76 x17: ffff8000159dd000 x16: ffff8000122986bc x15: ffff0001b3d17bbc x14: 1ffff00002b3c0b0 x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : 5a91a688f11cae00 x8 : 5a91a688f11cae00 x7 : ffff80000827d390 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000aaaa0cc x2 : ffff0001b3d17cd0 x1 : 0000000100000000 x0 : 0000000000000051 Call trace: assertfail+0x28/0x2c fs/btrfs/ctree.h:3716 close_ctree+0x708/0xaf4 fs/btrfs/disk-io.c:4718 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:397 generic_shutdown_super+0x130/0x328 fs/super.c:501 kill_anon_super+0x4c/0x74 fs/super.c:1128 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2449 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132 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+0x9c/0x168 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: 912b0000 90002b02 91370042 97fff925 (d4210000) ---[ end trace 0000000000000000 ]---