BTRFS warning (device loop2): qgroup 0/5 has unreleased space, type 0 rsv 16384 BTRFS error (device loop2): qgroup reserved space leaked BTRFS info (device loop2): at unmount dio bytes count 16384 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4035 at fs/btrfs/block-group.c:142 btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 Modules linked in: CPU: 0 PID: 4035 Comm: syz-executor Not tainted 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 lr : btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 sp : ffff80001f757830 x29: ffff80001f757830 x28: 1fffe0001a18102c x27: ffff0000d0c0a9d0 x26: dfff800000000000 x25: ffff800014811c20 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000d0c08000 x21: dfff800000000000 x20: 0000000000004000 x19: ffff0000d0c08000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d4b38 x15: 0000000000000003 x14: 00000000ffff8000 x13: 00000000b5c3bbf8 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a03a5c0 x8 : ffff0000d834b680 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a03a3a4 x2 : 0000000000000001 x1 : 0000000000004000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 btrfs_free_block_groups+0x708/0xb44 fs/btrfs/block-group.c:3978 close_ctree+0x608/0x84c fs/btrfs/disk-io.c:4528 btrfs_put_super+0x40/0x50 fs/btrfs/super.c:340 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_anon_super+0x4c/0x80 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2390 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 213656 hardirqs last enabled at (213655): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (213656): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (212772): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (212772): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586 softirqs last disabled at (212727): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (212727): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (212727): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (212727): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641 ---[ end trace 07b225390f8d3a13 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4035 at fs/btrfs/block-group.c:3996 btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:3997 Modules linked in: CPU: 0 PID: 4035 Comm: syz-executor Tainted: G W 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:3997 lr : btrfs_free_block_groups+0xa7c/0xb44 fs/btrfs/block-group.c:3995 sp : ffff80001f757860 x29: ffff80001f757880 x28: 1fffe0001b5d4a20 x27: ffff0000d0c0b1d0 x26: dfff800000000000 x25: ffff0000daea59d0 x24: 0000000000028000 x23: ffff0000d0c0a800 x22: ffff0000d0c0a8a8 x21: 0000000000000000 x20: ffff0000daea5100 x19: ffff0000daea4000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d4b38 x15: 0000000000000003 x14: 00000000111a14d8 x13: 1ffff0000282a06b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a04da78 x8 : ffff0000d834b680 x7 : ffff80000a0352ac x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d0c0a800 x0 : ffff0000daea4000 Call trace: btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:3997 close_ctree+0x608/0x84c fs/btrfs/disk-io.c:4528 btrfs_put_super+0x40/0x50 fs/btrfs/super.c:340 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_anon_super+0x4c/0x80 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2390 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 213806 hardirqs last enabled at (213805): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (213806): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (213780): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (213780): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586 softirqs last disabled at (213659): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (213659): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (213659): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (213659): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641 ---[ end trace 07b225390f8d3a14 ]--- BTRFS info (device loop2): space_info 5 has 3026944 free, is not full BTRFS info (device loop2): space_info total=3276800, used=69632, pinned=0, reserved=16384, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop2): global_block_rsv: size 0 reserved 0 BTRFS info (device loop2): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop2): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop2): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop2): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4035 at fs/btrfs/block-group.c:4008 btrfs_free_block_groups+0xa64/0xb44 fs/btrfs/block-group.c:4009 Modules linked in: CPU: 0 PID: 4035 Comm: syz-executor Tainted: G W 5.15.184-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0xa64/0xb44 fs/btrfs/block-group.c:4009 lr : btrfs_free_block_groups+0xa54/0xb44 fs/btrfs/block-group.c:4008 sp : ffff80001f757860 x29: ffff80001f757880 x28: 1fffe0001b5d4a20 x27: ffff0000d0c0b1d0 x26: dfff800000000000 x25: ffff0000daea59d0 x24: 0000000000004000 x23: ffff0000d0c0a800 x22: ffff0000d0c0a8a8 x21: 0000000000000000 x20: ffff0000daea5100 x19: ffff0000daea4000 x18: 0000000000000002 x17: 0000000040000000 x16: ffff8000082bf2b8 x15: 0000000000000002 x14: 0000000000ff0100 x13: 1ffff0000282a06b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a04da50 x8 : ffff0000d834b680 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d0c0a800 x0 : ffff0000daea4000 Call trace: btrfs_free_block_groups+0xa64/0xb44 fs/btrfs/block-group.c:4009 close_ctree+0x608/0x84c fs/btrfs/disk-io.c:4528 btrfs_put_super+0x40/0x50 fs/btrfs/super.c:340 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_anon_super+0x4c/0x80 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2390 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0xf8/0x118 fs/super.c:366 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x12c/0x1e0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 214458 hardirqs last enabled at (214457): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (214457): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4784 hardirqs last disabled at (214458): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (214452): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (214452): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586 softirqs last disabled at (214255): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (214255): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (214255): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (214255): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641 ---[ end trace 07b225390f8d3a15 ]--- BTRFS info (device loop2): space_info 5 has 3026944 free, is not full BTRFS info (device loop2): space_info total=3276800, used=69632, pinned=0, reserved=16384, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop2): global_block_rsv: size 0 reserved 0 BTRFS info (device loop2): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop2): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop2): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop2): delayed_refs_rsv: size 0 reserved 0 VFS: Busy inodes after unmount of loop2. Self-destruct in 5 seconds. Have a nice day...