BTRFS info (device loop4): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop4): at unmount dio bytes count 12288 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6491 at fs/btrfs/block-group.c:159 btrfs_put_block_group+0x2cc/0x360 fs/btrfs/block-group.c:159 Modules linked in: CPU: 1 UID: 0 PID: 6491 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT 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+0x2cc/0x360 fs/btrfs/block-group.c:159 lr : btrfs_put_block_group+0x2cc/0x360 fs/btrfs/block-group.c:159 sp : ffff8000a27a7950 x29: ffff8000a27a7950 x28: 1fffe0001f5fc82c x27: dfff800000000000 x26: ffff0000fafe31a8 x25: 0000000000000002 x24: 0000000000000001 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000001 x20: 0000000000003000 x19: ffff0000fafe4000 x18: 1fffe0003386f276 x17: ffff80008f31e000 x16: ffff8000805290ac x15: 0000000000000001 x14: 1fffe0001f5fc835 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001f5fc836 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d67e3d00 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff8000824a9a60 x2 : 0000000000000001 x1 : 0000000000003000 x0 : 0000000000000000 Call trace: btrfs_put_block_group+0x2cc/0x360 fs/btrfs/block-group.c:159 (P) btrfs_free_block_groups+0x998/0xe18 fs/btrfs/block-group.c:4493 close_ctree+0x63c/0xae4 fs/btrfs/disk-io.c:4486 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_anon_super+0x4c/0x7c fs/super.c:1237 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2103 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438 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+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 253638 hardirqs last enabled at (253637): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (253638): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (251850): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (251848): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6491 at fs/btrfs/block-group.c:4511 btrfs_free_block_groups+0xac0/0xe18 fs/btrfs/block-group.c:4512 Modules linked in: CPU: 0 UID: 0 PID: 6491 Comm: syz-executor Tainted: G W 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Tainted: [W]=WARN 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+0xac0/0xe18 fs/btrfs/block-group.c:4512 lr : btrfs_free_block_groups+0xcf0/0xe18 fs/btrfs/block-group.c:4510 sp : ffff8000a27a7990 x29: ffff8000a27a79a0 x28: 1fffe0001f5fc72c x27: dfff800000000000 x26: 1fffe0001b735a45 x25: 0000000000100000 x24: 0000000000028000 x23: ffff0000fafe3000 x22: ffff0000fafe30b8 x21: ffff0000db9adaf0 x20: ffff0000db9ad228 x19: ffff0000db9ac000 x18: 1fffe0003386f276 x17: ffff80008f31e000 x16: ffff8000805290ac x15: 0000000000000001 x14: 1fffe0001f5fc601 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001f5fc602 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d67e3d00 x7 : ffff8000824a5068 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000fafe3000 x0 : ffff0000db9ac000 Call trace: btrfs_free_block_groups+0xac0/0xe18 fs/btrfs/block-group.c:4512 (P) close_ctree+0x63c/0xae4 fs/btrfs/disk-io.c:4486 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_anon_super+0x4c/0x7c fs/super.c:1237 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2103 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438 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+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 253884 hardirqs last enabled at (253883): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (253884): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (253858): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (253858): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (253643): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop4): space_info DATA+METADATA has 3055616 free, is not full BTRFS info (device loop4): space_info total=3276800, used=45056, 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: 6491 at fs/btrfs/block-group.c:4523 btrfs_free_block_groups+0xcd4/0xe18 fs/btrfs/block-group.c:4524 Modules linked in: CPU: 1 UID: 0 PID: 6491 Comm: syz-executor Tainted: G W 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Tainted: [W]=WARN 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+0xcd4/0xe18 fs/btrfs/block-group.c:4524 lr : btrfs_free_block_groups+0xcc4/0xe18 fs/btrfs/block-group.c:4523 sp : ffff8000a27a7990 x29: ffff8000a27a79a0 x28: 1fffe0001f5fc72c x27: dfff800000000000 x26: 1fffe0001b735a45 x25: 0000000000100000 x24: 0000000000003000 x23: ffff0000fafe3000 x22: ffff0000fafe30b8 x21: ffff0000db9adaf0 x20: ffff0000db9ad228 x19: ffff0000db9ac000 x18: 00000000ffffffff x17: ffff800092f39000 x16: ffff8000805290ac x15: 0000000000000001 x14: 1fffe0001f5fc601 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001f5fc602 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d67e3d00 x7 : ffff80008054de70 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000fafe3000 x0 : ffff0000db9ac000 Call trace: btrfs_free_block_groups+0xcd4/0xe18 fs/btrfs/block-group.c:4524 (P) close_ctree+0x63c/0xae4 fs/btrfs/disk-io.c:4486 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_anon_super+0x4c/0x7c fs/super.c:1237 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2103 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438 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+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 254040 hardirqs last enabled at (254039): [] console_trylock_spinning+0x258/0x3b0 kernel/printk/printk.c:2043 hardirqs last disabled at (254040): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (253964): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (253964): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (253889): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- BTRFS info (device loop4): space_info DATA+METADATA has 3055616 free, is not full BTRFS info (device loop4): space_info total=3276800, used=45056, 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 (btrfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:652! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 6491 Comm: syz-executor Tainted: G W 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650 lr : generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650 sp : ffff8000a27a7ba0 x29: ffff8000a27a7ba0 x28: 00007dfeb25f8ba8 x27: ffff80008f321e88 x26: ffffffffffffffff x25: dfff800000000000 x24: 1fffe0001aa7c4f0 x23: ffff80008b295600 x22: dfff800000000000 x21: 0000000000000000 x20: ffff80008fa717e0 x19: ffff0000d53e2000 x18: 1fffe0003386aa76 x17: ffff80008f31e000 x16: ffff80008adbe9e4 x15: 0000000000000001 x14: 1ffff000144f4ee0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7000144f4ee1 x10: 0000000000ff0100 x9 : 8e4046889be94000 x8 : 8e4046889be94000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a27a7538 x4 : ffff80008f415ba0 x3 : ffff800082fbf044 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000002f Call trace: generic_shutdown_super+0x2b4/0x2b8 fs/super.c:650 (P) kill_anon_super+0x4c/0x7c fs/super.c:1237 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2103 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1431 __cleanup_mnt+0x20/0x30 fs/namespace.c:1438 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+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: 900511a0 913d0000 9119a261 97cf8f28 (d4210000) ---[ end trace 0000000000000000 ]---