BTRFS warning (device loop0): Skipping commit of aborted transaction.
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: CPU: 0 PID: 1043 at fs/btrfs/transaction.c:2020 cleanup_transaction fs/btrfs/transaction.c:2020 [inline]
WARNING: CPU: 0 PID: 1043 at fs/btrfs/transaction.c:2020 btrfs_commit_transaction+0x2f67/0x3950 fs/btrfs/transaction.c:2611
Modules linked in:
CPU: 0 UID: 0 PID: 1043 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~bpo12+1 04/01/2014
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
RIP: 0010:cleanup_transaction fs/btrfs/transaction.c:2020 [inline]
RIP: 0010:btrfs_commit_transaction+0x2f67/0x3950 fs/btrfs/transaction.c:2611
Code: 9f 2a d8 fd 84 c0 74 2b e8 56 f0 f1 fd eb 73 e8 4f f0 f1 fd 90 48 c7 c7 00 7f ae 8b 8b 5c 24 18 89 de e8 ac fd b4 fd 89 d9 90 <0f> 0b 90 90 e9 1a 01 00 00 e8 6b b5 7f 07 89 c3 31 ff 89 c6 e8 60
RSP: 0018:ffffc900025974e0 EFLAGS: 00010246
RAX: 6a79afffdd197900 RBX: 00000000ffffffe4 RCX: 00000000ffffffe4
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002597810 R08: ffff88801fc24293 R09: 1ffff11003f84852
R10: dffffc0000000000 R11: ffffed1003f84853 R12: ffff888032bfb738
R13: ffff888052474000 R14: ffff888052474000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808d301000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558a00636710 CR3: 0000000042530000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 flush_space+0x48b/0xcd0 fs/btrfs/space-info.c:888
 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:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>