BTRFS info (device loop0): at unmount dio bytes count 12288 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4328 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: 4328 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (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 : ffff80001f857830 x29: ffff80001f857830 x28: 1fffe00019545b2c x27: ffff0000caa2a1d0 x26: dfff800000000000 x25: ffff800014851340 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000caa2d800 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000caa2d800 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d6488 x15: 0000000000000003 x14: 00000000ffff8000 x13: 0000000014a883f6 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a02fde4 x8 : ffff0000d7991b40 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a02fbc8 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:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 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: 4633856 hardirqs last enabled at (4633855): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (4633856): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (4630888): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (4630886): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace e848e25cb67caee9 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4328 at fs/btrfs/block-group.c:4000 btrfs_free_block_groups+0x830/0xb44 fs/btrfs/block-group.c:4001 Modules linked in: CPU: 0 PID: 4328 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (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 : ffff80001f857860 x29: ffff80001f857880 x28: 1fffe00018f12a20 x27: ffff0000caa299d0 x26: dfff800000000000 x25: ffff0000c78959d0 x24: 0000000000028000 x23: ffff0000caa2a000 x22: ffff0000caa2a0a8 x21: 0000000000000000 x20: ffff0000c7895100 x19: ffff0000c7894000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d6488 x15: 0000000000000003 x14: 00000000111c92a8 x13: 1ffff0000283206b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a04329c x8 : ffff0000d7991b40 x7 : ffff80000a02aad0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000caa2a000 x0 : ffff0000c7894000 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:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 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: 4634024 hardirqs last enabled at (4634023): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (4634024): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (4633974): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (4633974): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (4633859): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (4633859): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (4633859): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (4633859): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace e848e25cb67caeea ]--- BTRFS info (device loop0): space_info 5 has 3043328 free, is not full BTRFS info (device loop0): space_info total=3276800, used=57344, 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: 4328 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: 4328 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (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 : ffff80001f857860 x29: ffff80001f857880 x28: 1fffe00018f12a20 x27: ffff0000caa299d0 x26: dfff800000000000 x25: ffff0000c78959d0 x24: 0000000000003000 x23: ffff0000caa2a000 x22: ffff0000caa2a0a8 x21: 0000000000000000 x20: ffff0000c7895100 x19: ffff0000c7894000 x18: 0000000000000003 x17: 0000000000000000 x16: ffff8000082d6488 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a043274 x8 : ffff0000d7991b40 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001f856e58 x4 : ffff80001426f520 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000caa2a000 x0 : ffff0000c7894000 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:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 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: 4634398 hardirqs last enabled at (4634397): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (4634398): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (4634334): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (4634334): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (4634185): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (4634185): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (4634185): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (4634185): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace e848e25cb67caeeb ]--- BTRFS info (device loop0): space_info 5 has 3043328 free, is not full BTRFS info (device loop0): space_info total=3276800, used=57344, 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...