------------[ 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/u4:5/73
Modules linked in:
CPU: 0 UID: 0 PID: 73 Comm: kworker/u4:5 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 39 59 8d fd 90 0f 0b 90 f7 db e9 47 fd ff ff e8 29 59 8d fd eb 10 e8 22 59 8d fd eb 09 e8 1b 59 8d fd 90 <0f> 0b 90 48 8b 5c 24 18 44 89 e1 f7 d9 e9 47 fc ff ff e8 03 59 8d
RSP: 0018:ffffc90000cd7540 EFLAGS: 00010293
RAX: ffffffff8439ba15 RBX: ffff88800e7d8001 RCX: ffff888000a14b00
RDX: 0000000000000000 RSI: ffffffff8f1fbbf0 RDI: 00000000ffffffe4
RBP: ffffc90000cd77c0 R08: ffff888000a14b00 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 00000000ffffffe4
R13: fffff5200019aec4 R14: dffffc0000000000 R15: ffff8880511ea358
FS:  0000000000000000(0000) GS:ffff88808c534000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564480e5c694 CR3: 0000000012cd9000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __btrfs_end_transaction+0x140/0x640 fs/btrfs/transaction.c:1092
 flush_space+0x608/0xde0 fs/btrfs/space-info.c:-1
 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>