------------[ cut here ]------------ btrfs_abort_should_print_stack(__error) WARNING: fs/btrfs/block-group.c:3881 at do_chunk_alloc fs/btrfs/block-group.c:3881 [inline], CPU#0: kworker/u8:5/15670 WARNING: fs/btrfs/block-group.c:3881 at btrfs_chunk_alloc+0x1501/0x1550 fs/btrfs/block-group.c:4106, CPU#0: kworker/u8:5/15670 Modules linked in: CPU: 0 UID: 0 PID: 15670 Comm: kworker/u8:5 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Workqueue: events_unbound btrfs_async_reclaim_data_space RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:3881 [inline] RIP: 0010:btrfs_chunk_alloc+0x1501/0x1550 fs/btrfs/block-group.c:4106 Code: c1 0f 8c 79 fa ff ff 48 8b 7c 24 10 e8 98 ea f1 fd e9 6a fa ff ff e8 0e 19 7b fd eb 10 e8 07 19 7b fd eb 09 e8 00 19 7b fd 90 <0f> 0b 90 89 e9 f7 d9 e9 63 fb ff ff e8 ee 18 7b fd eb 10 e8 e7 18 RSP: 0018:ffffc90006f9f7a0 EFLAGS: 00010293 RAX: ffffffff844e0170 RBX: ffff888029ae0001 RCX: ffff88802ef05dc0 RDX: 0000000000000000 RSI: ffffffff90821a30 RDI: 00000000fffffffe RBP: 00000000fffffffe R08: ffff88802ef05dc0 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000000 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff888077355490 R15: 00000000fffffffe FS: 0000000000000000(0000) GS:ffff888123413000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e7d4d3fe18 CR3: 000000007a616000 CR4: 00000000003526f0 Call Trace: flush_space+0x3df/0xde0 fs/btrfs/space-info.c:908 do_async_reclaim_data_space+0x137/0x550 fs/btrfs/space-info.c:1455 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1519 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245