BTRFS info (device loop4): at unmount dio bytes count 12288 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4379 at fs/btrfs/block-group.c:142 btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 Modules linked in: CPU: 1 PID: 4379 Comm: syz-executor.4 Not tainted 5.15.189-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 : ffff80001fc27830 x29: ffff80001fc27830 x28: 1fffe0001c97302c x27: ffff0000db5b49d0 x26: dfff800000000000 x25: ffff800014830740 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000e4b98000 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000e4b98000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d6448 x15: 0000000000000003 x14: 00000000ffff8000 x13: 000000004104d937 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a02bd04 x8 : ffff0000d80bd1c0 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a02bae8 x2 : 0000000000000001 x1 : 0000000000003000 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:3982 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:1139 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146 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: 426914 hardirqs last enabled at (426913): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (426914): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (425736): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (425736): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (425609): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (425609): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (425609): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (425609): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 3dd6165fa3b91dba ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4379 at fs/btrfs/block-group.c:4000 btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:4001 Modules linked in: CPU: 1 PID: 4379 Comm: syz-executor.4 Tainted: G W 5.15.189-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:4001 lr : btrfs_free_block_groups+0xa7c/0xb44 fs/btrfs/block-group.c:3999 sp : ffff80001fc27860 x29: ffff80001fc27880 x28: 1fffe00019326220 x27: ffff0000db5b09d0 x26: dfff800000000000 x25: ffff0000c99319d0 x24: 0000000000028000 x23: ffff0000db5b4800 x22: ffff0000db5b48a8 x21: 0000000000000000 x20: ffff0000c9931100 x19: ffff0000c9930000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d6448 x15: 0000000000000003 x14: 00000000111b85b8 x13: 1ffff0000282e06b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a03f1c8 x8 : ffff0000d80bd1c0 x7 : ffff80000a0269f0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000db5b4800 x0 : ffff0000c9930000 Call trace: btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:4001 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:1139 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146 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: 427208 hardirqs last enabled at (427207): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (427208): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (427158): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (427158): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (426917): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (426917): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (426917): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (426917): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 3dd6165fa3b91dbb ]--- BTRFS info (device loop4): space_info 5 has 3043328 free, is not full BTRFS info (device loop4): space_info total=3276800, used=57344, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop4): global_block_rsv: size 0 reserved 0 BTRFS info (device loop4): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop4): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop4): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop4): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4379 at fs/btrfs/block-group.c:4012 btrfs_free_block_groups+0xa64/0xb44 fs/btrfs/block-group.c:4013 Modules linked in: CPU: 1 PID: 4379 Comm: syz-executor.4 Tainted: G W 5.15.189-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:4013 lr : btrfs_free_block_groups+0xa54/0xb44 fs/btrfs/block-group.c:4012 sp : ffff80001fc27860 x29: ffff80001fc27880 x28: 1fffe00019326220 x27: ffff0000db5b09d0 x26: dfff800000000000 x25: ffff0000c99319d0 x24: 0000000000003000 x23: ffff0000db5b4800 x22: ffff0000db5b48a8 x21: 0000000000000000 x20: ffff0000c9931100 x19: ffff0000c9930000 x18: 1fffff7ffdfdb1ae x17: 1fffff7ffdfdb1ae x16: ffff8000082c0bc8 x15: ffff80001420eda0 x14: fffffbffefed8d80 x13: 1ffff0000282e06b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a03f1a0 x8 : ffff0000d80bd1c0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000db5b4800 x0 : ffff0000c9930000 Call trace: btrfs_free_block_groups+0xa64/0xb44 fs/btrfs/block-group.c:4013 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:1139 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146 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: 427340 hardirqs last enabled at (427339): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (427339): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4784 hardirqs last disabled at (427340): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (427314): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (427314): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (427303): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (427303): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (427303): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (427303): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 3dd6165fa3b91dbc ]--- BTRFS info (device loop4): space_info 5 has 3043328 free, is not full BTRFS info (device loop4): space_info total=3276800, used=57344, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop4): global_block_rsv: size 0 reserved 0 BTRFS info (device loop4): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop4): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop4): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop4): delayed_refs_rsv: size 0 reserved 0 VFS: Busy inodes after unmount of loop4. Self-destruct in 5 seconds. Have a nice day...