BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 299008 free, is full
BTRFS info (device loop0): space_info total=11534336, used=1994752, pinned=0, reserved=0, may_use=983040, readonly=8257536 zone_unusable=0
BTRFS info (device loop0): global_block_rsv: size 983040 reserved 978944
BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0
BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0
BTRFS info (device loop0): remap_block_rsv: size 0 reserved 0
BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0
BTRFS info (device loop0): delayed_refs_rsv: size 0 reserved 0
BTRFS info (device loop0): block group 5242880 has 1638400 bytes, 1523712 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (114688 bytes available) 
BTRFS critical (device loop0): entry offset 5255168, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5267456, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5308416, bytes 8192, bitmap no
BTRFS critical (device loop0): entry offset 5328896, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5357568, bytes 12288, bitmap no
BTRFS critical (device loop0): entry offset 5378048, bytes 8192, bitmap no
BTRFS critical (device loop0): entry offset 5398528, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5582848, bytes 8192, bitmap no
BTRFS critical (device loop0): entry offset 5779456, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5791744, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5799936, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5963776, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 5980160, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6156288, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6184960, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6258688, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6279168, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6287360, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6311936, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6340608, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6709248, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6721536, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 6836224, bytes 4096, bitmap no
BTRFS info (device loop0): block group has cluster?: no
BTRFS info (device loop0): 23 free space entries at or bigger than 4096 bytes
BTRFS info (device loop0): block group 6881280 has 1638400 bytes, 471040 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (1167360 bytes available) 
BTRFS critical (device loop0): entry offset 6885376, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 7106560, bytes 4096, bitmap no
BTRFS critical (device loop0): entry offset 7114752, bytes 12288, bitmap no
BTRFS critical (device loop0): entry offset 7241728, bytes 16384, bitmap no
BTRFS critical (device loop0): entry offset 7389184, bytes 1130496, bitmap no
BTRFS info (device loop0): block group has cluster?: no
BTRFS info (device loop0): 5 free space entries at or bigger than 4096 bytes
BTRFS info (device loop0): block group 8519680 has 8257536 bytes, 0 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (8257536 bytes available) 
BTRFS critical (device loop0): entry offset 8519680, bytes 8257536, bitmap no
BTRFS info (device loop0): block group has cluster?: no
BTRFS info (device loop0): 1 free space entries at or bigger than 4096 bytes
BTRFS info (device loop0): 9539584 bytes available across all block groups
BTRFS warning (device loop0): Skipping commit of aborted transaction.
------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/transaction.c:2073 at cleanup_transaction+0x727/0x7c0 fs/btrfs/transaction.c:2073, CPU#0: kworker/u4:1/13
Modules linked in:
CPU: 0 UID: 0 PID: 13 Comm: kworker/u4:1 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:cleanup_transaction+0x727/0x7c0 fs/btrfs/transaction.c:2073
Code: 08 74 1a 41 83 fc fb 74 0d 41 83 fc f4 75 15 e8 ff 6e ad fd eb 17 e8 f8 6e ad fd eb 10 e8 f1 6e ad fd eb 09 e8 ea 6e ad fd 90 <0f> 0b 90 41 f7 dc e9 44 fa ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000026f440 EFLAGS: 00010293
RAX: ffffffff841a7e26 RBX: ffff88801f7fd000 RCX: ffff88801b770000
RDX: 0000000000000000 RSI: ffffffff8f3dbdb0 RDI: 00000000ffffffe4
RBP: ffffc9000026f570 R08: ffff88801b770000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 00000000ffffffe4
R13: ffff88801fcef490 R14: ffff88801fcef4f0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb273f6df58 CR3: 000000001249b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x2627/0x3170 fs/btrfs/transaction.c:2675
 flush_space+0x28a/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:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 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>