------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/block-group.c:3865 at do_chunk_alloc fs/btrfs/block-group.c:3865 [inline], CPU#0: kworker/u4:7/181
WARNING: fs/btrfs/block-group.c:3865 at btrfs_chunk_alloc+0x1313/0x1550 fs/btrfs/block-group.c:4106, CPU#0: kworker/u4:7/181
Modules linked in:
CPU: 0 UID: 0 PID: 181 Comm: kworker/u4:7 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:3865 [inline]
RIP: 0010:btrfs_chunk_alloc+0x1313/0x1550 fs/btrfs/block-group.c:4106
Code: 8d f0 ff ff be 08 00 00 00 4c 89 e7 e8 06 39 f1 fd e9 7b f0 ff ff e8 cc e7 77 fd eb 10 e8 c5 e7 77 fd eb 09 e8 be e7 77 fd 90 <0f> 0b 90 44 89 f9 f7 d9 49 bd 00 00 00 00 00 fc ff df e9 a1 fc ff
RSP: 0018:ffffc90001a477a0 EFLAGS: 00010293
RAX: ffffffff84514a72 RBX: ffff888038fc8000 RCX: ffff888034ad0000
RDX: 0000000000000000 RSI: ffffffff90825e80 RDI: 00000000ffffffe4
RBP: 00000000ffffff01 R08: ffff888034ad0000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: ffff888045abad98
R13: dffffc0000000000 R14: ffff8880547dc000 R15: ffffffffffffffe4
FS:  0000000000000000(0000) GS:ffff88808a9f9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffce6e24000 CR3: 0000000041197000 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: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
 </TASK>