------------[ cut here ]------------ WARNING: CPU: 1 PID: 4248 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: 4248 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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 : ffff80001f317830 x29: ffff80001f317830 x28: 1fffe0001afcb02c x27: ffff0000d7e5d1d0 x26: dfff800000000000 x25: ffff800014971740 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000d7e58000 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000d7e58000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d8c18 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001afcb033 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a05f7c4 x8 : ffff0000cbf71b40 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a05f5a8 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:4505 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: 803036 hardirqs last enabled at (803035): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (803036): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (802682): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (802682): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (802665): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (802665): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (802665): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (802665): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace e2c4eefa8e5c605d ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4248 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: 4248 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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 : ffff80001f317860 x29: ffff80001f317880 x28: 1fffe0001b59ea20 x27: ffff0000d7e5e1d0 x26: dfff800000000000 x25: ffff0000dacf59d0 x24: 0000000000028000 x23: ffff0000d7e5d000 x22: ffff0000d7e5d0a8 x21: 0000000000000000 x20: ffff0000dacf5100 x19: ffff0000dacf4000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d8c18 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001afcba00 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a072d48 x8 : ffff0000cbf71b40 x7 : ffff80000a05a4c0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d7e5d000 x0 : ffff0000dacf4000 Call trace: btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 close_ctree+0x618/0x834 fs/btrfs/disk-io.c:4505 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: 803206 hardirqs last enabled at (803205): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (803206): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (803156): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (803156): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (803039): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (803039): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (803039): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (803039): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace e2c4eefa8e5c605e ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4248 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: 4248 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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 : ffff80001f317860 x29: ffff80001f317880 x28: 1fffe0001b59ea20 x27: ffff0000d7e5e1d0 x26: dfff800000000000 x25: ffff0000dacf59d0 x24: 0000000000003000 x23: ffff0000d7e5d000 x22: ffff0000d7e5d0a8 x21: 0000000000000000 x20: ffff0000dacf5100 x19: ffff0000dacf4000 x18: 0000000000000002 x17: 0000000000000000 x16: ffff8000082d8c18 x15: 0000000000000063 x14: 0000000000000001 x13: 1fffe0001afcba00 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a072d20 x8 : ffff0000cbf71b40 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000d7e5d000 x0 : ffff0000dacf4000 Call trace: btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 close_ctree+0x618/0x834 fs/btrfs/disk-io.c:4505 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: 803266 hardirqs last enabled at (803265): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (803265): [] _raw_spin_unlock_irqrestore+0xa8/0x14c kernel/locking/spinlock.c:194 hardirqs last disabled at (803266): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (803246): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (803246): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (803209): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (803209): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (803209): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (803209): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace e2c4eefa8e5c605f ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...