BTRFS info (device loop0): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop0): at unmount dio bytes count 8192 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7100 at fs/btrfs/block-group.c:172 btrfs_put_block_group+0x2cc/0x364 fs/btrfs/block-group.c:172 Modules linked in: CPU: 0 UID: 0 PID: 7100 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : btrfs_put_block_group+0x2cc/0x364 fs/btrfs/block-group.c:172 lr : btrfs_put_block_group+0x2cc/0x364 fs/btrfs/block-group.c:172 sp : ffff8000a1867910 x29: ffff8000a1867910 x28: 1fffe0001b58032c x27: dfff800000000000 x26: ffff0000cdd389c0 x25: 0000000000000001 x24: ffff0000dac019a8 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000001 x20: 0000000000002000 x19: ffff0000dac01800 x18: 1fffe00033797688 x17: ffff80008f7de000 x16: ffff800080535bbc x15: 0000000000000001 x14: 1fffe0001b580335 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b580336 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d01c8000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff800082563e90 x2 : 0000000000000001 x1 : 0000000000002000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x2cc/0x364 fs/btrfs/block-group.c:172 (P) btrfs_free_block_groups+0x9a0/0xd10 fs/btrfs/block-group.c:4561 close_ctree+0x644/0x1130 fs/btrfs/disk-io.c:4424 btrfs_put_super+0x1ac/0x1c0 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_anon_super+0x4c/0x7c fs/super.c:1282 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2117 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 188076 hardirqs last enabled at (188075): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (188076): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (185980): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (185978): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7100 at fs/btrfs/block-group.c:4455 check_removing_space_info+0x10c/0x280 fs/btrfs/block-group.c:4456 Modules linked in: CPU: 0 UID: 0 PID: 7100 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : check_removing_space_info+0x10c/0x280 fs/btrfs/block-group.c:4456 lr : check_removing_space_info+0x260/0x280 fs/btrfs/block-group.c:4455 sp : ffff8000a1867910 x29: ffff8000a1867910 x28: 1fffe0001b58052c x27: dfff800000000000 x26: ffff0000dac02858 x25: 0000000000000001 x24: 1fffe00019ba7102 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000018000 x20: ffff0000e0fc0000 x19: ffff0000cdd38800 x18: 1fffe00033797688 x17: ffff80008f7de000 x16: ffff800080535bbc x15: 0000000000000001 x14: 1fffe00019ba7104 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600019ba7105 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d01c8000 x7 : ffff80008255ec7c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000cdd38800 x0 : ffff0000e0fc0000 Call trace: check_removing_space_info+0x10c/0x280 fs/btrfs/block-group.c:4456 (P) btrfs_free_block_groups+0xa80/0xd10 fs/btrfs/block-group.c:4573 close_ctree+0x644/0x1130 fs/btrfs/disk-io.c:4424 btrfs_put_super+0x1ac/0x1c0 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_anon_super+0x4c/0x7c fs/super.c:1282 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2117 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 188154 hardirqs last enabled at (188153): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (188154): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (188128): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (188128): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (188079): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 3055616 free, is not full BTRFS info (device loop0): space_info total=3276800, used=114688, pinned=0, reserved=8192, may_use=98304, 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: 7100 at fs/btrfs/block-group.c:4466 check_removing_space_info+0x248/0x280 fs/btrfs/block-group.c:4467 Modules linked in: CPU: 0 UID: 0 PID: 7100 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : check_removing_space_info+0x248/0x280 fs/btrfs/block-group.c:4467 lr : check_removing_space_info+0x238/0x280 fs/btrfs/block-group.c:4466 sp : ffff8000a1867910 x29: ffff8000a1867910 x28: 1fffe0001b58052c x27: dfff800000000000 x26: ffff0000dac02858 x25: 0000000000000001 x24: 1fffe00019ba7102 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000002000 x20: ffff0000e0fc0000 x19: ffff0000cdd38800 x18: 1fffe00033797688 x17: ffff800093524000 x16: ffff800080535bbc x15: 0000000000000001 x14: 1fffe00019ba7104 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600019ba7105 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d01c8000 x7 : ffff800080563d30 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000cdd38800 x0 : ffff0000e0fc0000 Call trace: check_removing_space_info+0x248/0x280 fs/btrfs/block-group.c:4467 (P) btrfs_free_block_groups+0xa80/0xd10 fs/btrfs/block-group.c:4573 close_ctree+0x644/0x1130 fs/btrfs/disk-io.c:4424 btrfs_put_super+0x1ac/0x1c0 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_anon_super+0x4c/0x7c fs/super.c:1282 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2117 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 188354 hardirqs last enabled at (188353): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (188353): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (188354): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (188306): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (188306): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (188157): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 3055616 free, is not full BTRFS info (device loop0): space_info total=3276800, used=114688, pinned=0, reserved=8192, may_use=98304, 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 (btrfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:653! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 7100 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651 lr : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651 sp : ffff8000a1867ba0 x29: ffff8000a1867ba0 x28: 00007dfeb32426d8 x27: ffff80008f7e2030 x26: ffffffffffffffff x25: dfff800000000000 x24: 1fffe0001b91f4f1 x23: ffff80008b505cc0 x22: dfff800000000000 x21: 0000000000000000 x20: ffff80008ff469e0 x19: ffff0000dc8fa000 x18: 1fffe00033797688 x17: ffff0001fea8c8b0 x16: ffff80008b0142f8 x15: 0000000000000001 x14: 1ffff00011f1c4c3 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000064773714 x10: 0000000000ff0100 x9 : f2907c4bce159300 x8 : f2907c4bce159300 x7 : ffff800080563d30 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000002 x1 : 0000000100000000 x0 : 000000000000002f Call trace: generic_shutdown_super+0x2b4/0x2b8 fs/super.c:651 (P) kill_anon_super+0x4c/0x7c fs/super.c:1282 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2117 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Code: b0052240 912e0000 9119c261 97ce40db (d4210000) ---[ end trace 0000000000000000 ]---