BTRFS info (device loop0): at unmount dio bytes count 12288 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4313 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: 4313 Comm: syz-executor.0 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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 : ffff8000204b7750 x29: ffff8000204b7750 x28: dfff800000000000 x27: ffff800015239d00 x26: 0000000000000002 x25: 0000000000000001 x24: ffff0000d8935000 x23: 0000000000000000 x22: 1fffe0001b126a2c x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000d8935000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000824ec08 x15: 0000000000000003 x14: 00000000ffff8000 x13: 000000004a7a2abe x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000dcc78000 x8 : ffff80000a2af9f0 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff80000a2af7d4 x2 : 0000000000000001 x1 : 0000000000003000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x248/0x288 fs/btrfs/block-group.c:142 btrfs_free_block_groups+0x730/0xb54 fs/btrfs/block-group.c:3978 close_ctree+0x654/0x898 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/0x74 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2391 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 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+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 2406302 hardirqs last enabled at (2406301): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (2406302): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (2404842): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (2404842): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (2404767): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (2404767): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (2404767): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (2404767): [] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 ---[ end trace a40b93da2de65bf4 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4313 at fs/btrfs/block-group.c:3996 btrfs_free_block_groups+0x850/0xb54 fs/btrfs/block-group.c:3995 Modules linked in: CPU: 0 PID: 4313 Comm: syz-executor.0 Tainted: G W 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0x850/0xb54 fs/btrfs/block-group.c:3995 lr : btrfs_free_block_groups+0xa8c/0xb54 fs/btrfs/block-group.c:3995 sp : ffff8000204b7780 x29: ffff8000204b77a0 x28: dfff800000000000 x27: ffff800015239d00 x26: 1fffe0001a45ca20 x25: 0000000000000001 x24: 0000000000028000 x23: ffff0000d8933800 x22: ffff0000d89338a8 x21: ffff0000d22e59d0 x20: ffff0000d22e5100 x19: ffff0000d22e4000 x18: 1fffe0001b12670a x17: 0000000000000000 x16: ffff80000824ec08 x15: 0000000000000003 x14: 1ffff0000296e06c x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000dcc78000 x8 : ffff80000a2c44fc x7 : ffff80000a2aa31c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008305a14 x2 : 0000000000000001 x1 : 0000000000028000 x0 : 0000000000000000 Call trace: btrfs_free_block_groups+0x850/0xb54 fs/btrfs/block-group.c:3995 close_ctree+0x654/0x898 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/0x74 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2391 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 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+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 2406522 hardirqs last enabled at (2406521): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (2406522): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (2406472): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (2406472): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (2406305): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (2406305): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (2406305): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (2406305): [] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 ---[ end trace a40b93da2de65bf5 ]--- 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: 0 PID: 4313 at fs/btrfs/block-group.c:4008 btrfs_free_block_groups+0xa5c/0xb54 fs/btrfs/block-group.c:4008 Modules linked in: CPU: 0 PID: 4313 Comm: syz-executor.0 Tainted: G W 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : btrfs_free_block_groups+0xa5c/0xb54 fs/btrfs/block-group.c:4008 lr : btrfs_free_block_groups+0xa5c/0xb54 fs/btrfs/block-group.c:4008 sp : ffff8000204b7780 x29: ffff8000204b77a0 x28: dfff800000000000 x27: ffff800015239d00 x26: 1fffe0001a45ca20 x25: 0000000000000001 x24: 0000000000003000 x23: ffff0000d8933800 x22: ffff0000d89338a8 x21: ffff0000d22e59d0 x20: ffff0000d22e5100 x19: dead000000000100 x18: 1fffe0003682eb8e x17: 1fffe0003682eb8e x16: ffff8000082ec940 x15: ffff800014c0fac0 x14: 1ffff0000296e06c x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000dcc78000 x8 : ffff80000a2c44cc x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff8000082592d4 x2 : 0000000000000001 x1 : 0000000000003000 x0 : 0000000000000000 Call trace: btrfs_free_block_groups+0xa5c/0xb54 fs/btrfs/block-group.c:4008 close_ctree+0x654/0x898 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/0x74 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2391 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 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+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 2406940 hardirqs last enabled at (2406939): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (2406939): [] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:4781 hardirqs last disabled at (2406940): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (2406882): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (2406882): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (2406733): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (2406733): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (2406733): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (2406733): [] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 ---[ end trace a40b93da2de65bf6 ]--- 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...