------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/block-group.c:4268 at do_chunk_alloc fs/btrfs/block-group.c:4268 [inline], CPU#0: kworker/u4:9/1144
WARNING: fs/btrfs/block-group.c:4268 at btrfs_chunk_alloc+0x1501/0x1550 fs/btrfs/block-group.c:4493, CPU#0: kworker/u4:9/1144
Modules linked in:
CPU: 0 UID: 0 PID: 1144 Comm: kworker/u4:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4268 [inline]
RIP: 0010:btrfs_chunk_alloc+0x1501/0x1550 fs/btrfs/block-group.c:4493
Code: c1 0f 8c 79 fa ff ff 48 8b 7c 24 10 e8 98 00 f6 fd e9 6a fa ff ff e8 9e 66 83 fd eb 10 e8 97 66 83 fd eb 09 e8 90 66 83 fd 90 <0f> 0b 90 89 e9 f7 d9 e9 63 fb ff ff e8 7e 66 83 fd eb 10 e8 77 66
RSP: 0018:ffffc90000f477a0 EFLAGS: 00010293
RAX: ffffffff8444c370 RBX: ffff888053f1c001 RCX: ffff8880349b0000
RDX: 0000000000000000 RSI: ffffffff904132f0 RDI: 00000000fffffffe
RBP: 00000000fffffffe R08: ffff8880349b0000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88804436f028 R15: 00000000fffffffe
FS:  0000000000000000(0000) GS:ffff88808b09e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000045959000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 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:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 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
 </TASK>