------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/block-group.c:2951 at btrfs_create_pending_block_groups+0x13f6/0x15e0 fs/btrfs/block-group.c:2951, CPU#0: kworker/u4:7/176
Modules linked in:
CPU: 0 UID: 0 PID: 176 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_metadata_space
RIP: 0010:btrfs_create_pending_block_groups+0x13f6/0x15e0 fs/btrfs/block-group.c:2951
Code: 00 fc ff df eb 09 e8 c9 e3 8d fd 90 0f 0b 90 f7 db e9 47 fd ff ff e8 b9 e3 8d fd eb 10 e8 b2 e3 8d fd eb 09 e8 ab e3 8d fd 90 <0f> 0b 90 48 8b 5c 24 18 44 89 e1 f7 d9 e9 47 fc ff ff e8 93 e3 8d
RSP: 0018:ffffc900018bf540 EFLAGS: 00010293
RAX: ffffffff84393f15 RBX: ffff8880124c8001 RCX: ffff888033172540
RDX: 0000000000000000 RSI: ffffffff8f1fcb90 RDI: 00000000ffffffe4
RBP: ffffc900018bf7c0 R08: ffff888033172540 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 00000000ffffffe4
R13: fffff52000317ec4 R14: dffffc0000000000 R15: ffff8880409ee358
FS:  0000000000000000(0000) GS:ffff88808c540000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564be793de18 CR3: 0000000012c29000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __btrfs_end_transaction+0x140/0x640 fs/btrfs/transaction.c:1092
 flush_space+0x3e9/0xde0 fs/btrfs/space-info.c:912
 do_async_reclaim_metadata_space+0x3e8/0x940 fs/btrfs/space-info.c:1211
 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1278
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 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>