------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: CPU: 0 PID: 31 at fs/btrfs/block-group.c:4000 do_chunk_alloc fs/btrfs/block-group.c:4000 [inline]
WARNING: CPU: 0 PID: 31 at fs/btrfs/block-group.c:4000 btrfs_chunk_alloc+0xf9d/0x1460 fs/btrfs/block-group.c:4241
Modules linked in:
CPU: 0 UID: 0 PID: 31 Comm: kworker/u4:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4000 [inline]
RIP: 0010:btrfs_chunk_alloc+0xf9d/0x1460 fs/btrfs/block-group.c:4241
Code: b8 fd 84 c0 0f 84 63 01 00 00 e8 6e 44 d2 fd e9 8c 03 00 00 e8 64 44 d2 fd 90 48 c7 c7 20 08 d0 8b 44 89 f6 e8 c4 d0 95 fd 90 <0f> 0b 90 90 e9 3e fc ff ff e8 45 44 d2 fd eb 05 e8 3e 44 d2 fd e8
RSP: 0018:ffffc90000527778 EFLAGS: 00010246
RAX: efb30b1c009c5300 RBX: ffff888053028001 RCX: ffff888030f82440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: dffffc0000000000
R13: ffff88805258f800 R14: ffffffffffffffe4 R15: ffff888043bc2de0
FS:  0000000000000000(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ba98210480 CR3: 0000000051889000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 flush_space+0x30b/0xcd0 fs/btrfs/space-info.c:861
 do_async_reclaim_metadata_space+0x144/0x390 fs/btrfs/space-info.c:1158
 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1226
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>