------------[ cut here ]------------ WARNING: CPU: 0 PID: 4946 at fs/btrfs/block-group.c:142 btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 Modules linked in: CPU: 0 PID: 4946 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 lr : btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 sp : ffff80001f507830 x29: ffff80001f507830 x28: 1fffe0001b9c932c x27: ffff0000dcde41d0 x26: dfff800000000000 x25: ffff8000149513c0 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000dce49800 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000dce49800 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d88bc x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001b9c9333 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a05d218 x8 : ffff0000dbc8b680 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a05cffc x2 : 0000000000000001 x1 : 0000000000003000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 btrfs_free_block_groups+0x700/0xb3c fs/btrfs/block-group.c:3982 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 223414 hardirqs last enabled at (223413): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (223414): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (222524): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (222524): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (222429): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (222429): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (222429): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (222429): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 11731832e2c1f7ad ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4946 at fs/btrfs/block-group.c:4000 btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 Modules linked in: CPU: 0 PID: 4946 Comm: syz-executor Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 lr : btrfs_free_block_groups+0xa74/0xb3c fs/btrfs/block-group.c:3999 sp : ffff80001f507860 x29: ffff80001f507880 x28: 1fffe0001af16220 x27: ffff0000cb5739d0 x26: dfff800000000000 x25: ffff0000d78b19d0 x24: 0000000000028000 x23: ffff0000dcde4000 x22: ffff0000dcde40a8 x21: 0000000000000000 x20: ffff0000d78b1100 x19: ffff0000d78b0000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d88bc x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001b9bc800 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a07079c x8 : ffff0000dbc8b680 x7 : ffff80000a057f14 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dcde4000 x0 : ffff0000d78b0000 Call trace: btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 223520 hardirqs last enabled at (223519): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (223520): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (223504): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (223504): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (223417): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (223417): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (223417): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (223417): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 11731832e2c1f7ae ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4946 at fs/btrfs/block-group.c:4012 btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 Modules linked in: CPU: 0 PID: 4946 Comm: syz-executor Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 lr : btrfs_free_block_groups+0xa4c/0xb3c fs/btrfs/block-group.c:4012 sp : ffff80001f507860 x29: ffff80001f507880 x28: 1fffe0001af16220 x27: ffff0000cb5739d0 x26: dfff800000000000 x25: ffff0000d78b19d0 x24: 0000000000003000 x23: ffff0000dcde4000 x22: ffff0000dcde40a8 x21: 0000000000000000 x20: ffff0000d78b1100 x19: ffff0000d78b0000 x18: 0000000000000002 x17: 0000000000000000 x16: ffff8000082d88bc x15: 0000000000000063 x14: 0000000000000001 x13: 1fffe0001b9bc800 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a070774 x8 : ffff0000dbc8b680 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dcde4000 x0 : ffff0000d78b0000 Call trace: btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 223594 hardirqs last enabled at (223593): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (223593): [] _raw_spin_unlock_irqrestore+0xa8/0x14c kernel/locking/spinlock.c:194 hardirqs last disabled at (223594): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (223574): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (223574): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (223523): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (223523): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (223523): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (223523): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 11731832e2c1f7af ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BTRFS info (device loop0): at unmount dio bytes count 12288 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4946 at fs/btrfs/block-group.c:142 btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 Modules linked in: CPU: 1 PID: 4946 Comm: syz-executor Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 lr : btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 sp : ffff80001f507830 x29: ffff80001f507830 x28: 1fffe0001aa00a2c x27: ffff0000d50041d0 x26: dfff800000000000 x25: ffff8000149513c0 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000d5005000 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000d5005000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d88bc x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001aa00a33 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a05d218 x8 : ffff0000dbc8b680 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a05cffc x2 : 0000000000000001 x1 : 0000000000003000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 btrfs_free_block_groups+0x700/0xb3c fs/btrfs/block-group.c:3982 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 415166 hardirqs last enabled at (415165): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (415166): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (414284): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (414282): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace 11731832e2c1f7b0 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4946 at fs/btrfs/block-group.c:4000 btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 Modules linked in: CPU: 1 PID: 4946 Comm: syz-executor Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 lr : btrfs_free_block_groups+0xa74/0xb3c fs/btrfs/block-group.c:3999 sp : ffff80001f507860 x29: ffff80001f507880 x28: 1fffe0001aa9b220 x27: ffff0000d50039d0 x26: dfff800000000000 x25: ffff0000d54d99d0 x24: 0000000000028000 x23: ffff0000d5004000 x22: ffff0000d50040a8 x21: 0000000000000000 x20: ffff0000d54d9100 x19: ffff0000d54d8000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d88bc x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001aa00800 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a07079c x8 : ffff0000dbc8b680 x7 : ffff80000a057f14 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d5004000 x0 : ffff0000d54d8000 Call trace: btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 415276 hardirqs last enabled at (415275): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (415276): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (415260): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (415260): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (415169): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (415169): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (415169): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (415169): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 11731832e2c1f7b1 ]--- BTRFS info (device loop0): space_info 5 has 3047424 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 0 reserved 0 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4946 at fs/btrfs/block-group.c:4012 btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 Modules linked in: CPU: 1 PID: 4946 Comm: syz-executor Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 lr : btrfs_free_block_groups+0xa4c/0xb3c fs/btrfs/block-group.c:4012 sp : ffff80001f507860 x29: ffff80001f507880 x28: 1fffe0001aa9b220 x27: ffff0000d50039d0 x26: dfff800000000000 x25: ffff0000d54d99d0 x24: 0000000000003000 x23: ffff0000d5004000 x22: ffff0000d50040a8 x21: 0000000000000000 x20: ffff0000d54d9100 x19: ffff0000d54d8000 x18: 0000000000000003 x17: 0000000000000000 x16: ffff8000082d88bc x15: 00000000ffffffff x14: 0000000000000001 x13: 1fffe0001aa00800 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a070774 x8 : ffff0000dbc8b680 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001f506e78 x4 : ffff80001436f3e0 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d5004000 x0 : ffff0000d54d8000 Call trace: btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 close_ctree+0x618/0x834 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+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c 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+0xf0/0x1d0 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: 415408 hardirqs last enabled at (415407): [] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:257 hardirqs last disabled at (415408): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (415330): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (415330): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (415279): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (415279): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (415279): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (415279): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 11731832e2c1f7b2 ]--- BTRFS info (device loop0): space_info 5 has 3047424 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 0 reserved 0 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 0 reserved 0 VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...