------------[ cut here ]------------ WARNING: CPU: 0 PID: 4277 at fs/btrfs/block-group.c:142 btrfs_put_block_group+0x248/0x280 fs/btrfs/block-group.c:142 Modules linked in: CPU: 0 PID: 4277 Comm: syz-executor.3 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 : ffff80001f2b7830 x29: ffff80001f2b7830 x28: 1fffe0001baac72c x27: ffff0000dd5621d0 x26: dfff800000000000 x25: ffff800014971740 x24: 0000000000000002 x23: 0000000000000001 x22: ffff0000dd563800 x21: dfff800000000000 x20: 0000000000003000 x19: ffff0000dd563800 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d8c18 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001baac733 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a05f7c4 x8 : ffff0000d4abd1c0 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: 129130 hardirqs last enabled at (129129): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (129130): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (129120): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (129120): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (129075): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (129075): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (129075): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (129075): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 484cdf337575dc61 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4277 at fs/btrfs/block-group.c:4000 btrfs_free_block_groups+0x828/0xb3c fs/btrfs/block-group.c:4001 Modules linked in: CPU: 0 PID: 4277 Comm: syz-executor.3 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 : ffff80001f2b7860 x29: ffff80001f2b7880 x28: 1fffe0001cd6ea20 x27: ffff0000dd5619d0 x26: dfff800000000000 x25: ffff0000e6b759d0 x24: 0000000000028000 x23: ffff0000dd562000 x22: ffff0000dd5620a8 x21: 0000000000000000 x20: ffff0000e6b75100 x19: ffff0000e6b74000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d8c18 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001baac400 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a072d48 x8 : ffff0000d4abd1c0 x7 : ffff80000a05a4c0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dd562000 x0 : ffff0000e6b74000 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: 129338 hardirqs last enabled at (129337): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (129338): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (129310): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (129310): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (129133): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (129133): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (129133): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (129133): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 484cdf337575dc62 ]--- BTRFS info (device loop3): space_info 5 has 3043328 free, is not full BTRFS info (device loop3): space_info total=3276800, used=57344, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop3): global_block_rsv: size 0 reserved 0 BTRFS info (device loop3): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop3): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop3): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop3): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4277 at fs/btrfs/block-group.c:4012 btrfs_free_block_groups+0xa5c/0xb3c fs/btrfs/block-group.c:4013 Modules linked in: CPU: 0 PID: 4277 Comm: syz-executor.3 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 : ffff80001f2b7860 x29: ffff80001f2b7880 x28: 1fffe0001cd6ea20 x27: ffff0000dd5619d0 x26: dfff800000000000 x25: ffff0000e6b759d0 x24: 0000000000003000 x23: ffff0000dd562000 x22: ffff0000dd5620a8 x21: 0000000000000000 x20: ffff0000e6b75100 x19: ffff0000e6b74000 x18: 1fffe000341ee196 x17: 1fffe000341ee196 x16: ffff8000112695d4 x15: ffff8000089721bc x14: 0000000000000003 x13: 1ffff00003e56e24 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a072d20 x8 : ffff0000d4abd1c0 x7 : 0000000000000000 x6 : ffff800008971df4 x5 : ffff0000db216888 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff0000dd562000 x0 : ffff0000e6b74000 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: 129548 hardirqs last enabled at (129547): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (129548): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (129534): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (129534): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (129527): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (129527): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (129527): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (129527): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 484cdf337575dc63 ]--- BTRFS info (device loop3): space_info 5 has 3043328 free, is not full BTRFS info (device loop3): space_info total=3276800, used=57344, pinned=0, reserved=12288, may_use=163840, readonly=0 zone_unusable=0 BTRFS info (device loop3): global_block_rsv: size 0 reserved 0 BTRFS info (device loop3): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop3): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop3): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop3): delayed_refs_rsv: size 0 reserved 0 VFS: Busy inodes after unmount of loop3. Self-destruct in 5 seconds. Have a nice day...