BTRFS info (device loop8): block group 1048576 has 4194304 bytes, 4096 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (4190208 bytes available) [readonly]
BTRFS info (device loop8): block group has cluster?: no
BTRFS info (device loop8): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop8): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4012 at do_chunk_alloc fs/btrfs/block-group.c:4012 [inline], CPU#1: kworker/u8:11/1363
WARNING: fs/btrfs/block-group.c:4012 at btrfs_chunk_alloc+0x1029/0x15e0 fs/btrfs/block-group.c:4253, CPU#1: kworker/u8:11/1363
Modules linked in:
CPU: 1 UID: 0 PID: 1363 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4012 [inline]
RIP: 0010:btrfs_chunk_alloc+0x102b/0x15e0 fs/btrfs/block-group.c:4253
Code: ab d1 d3 fd e9 6d 01 00 00 e8 c1 c4 b9 fd 84 c0 74 22 e8 98 d1 d3 fd e9 5a 01 00 00 e8 8e d1 d3 fd 48 8d 3d b7 46 f8 0a 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 c6 bb e5 06 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc9000507f730 EFLAGS: 00010293
RAX: ffffffff83ebdaa2 RBX: ffffffffffffffe4 RCX: ffff8880279f0000
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8ee42160
RBP: 0000000000000000 R08: ffff8880279f0000 R09: 0000000000000003
R10: 0000000000000100 R11: 00000000fffffffb R12: 1ffff1100b559b1e
R13: ffff88805f840fd8 R14: ffff88802442c001 R15: ffff8880384fc800
FS:  0000000000000000(0000) GS:ffff888126def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c376034 CR3: 0000000038a04000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 flush_space+0x355/0xd20 fs/btrfs/space-info.c:894
 do_async_reclaim_data_space+0x145/0x520 fs/btrfs/space-info.c:1421
 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1485
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	ab                   	stos   %eax,%es:(%rdi)
   1:	d1 d3                	rcl    %ebx
   3:	fd                   	std
   4:	e9 6d 01 00 00       	jmp    0x176
   9:	e8 c1 c4 b9 fd       	call   0xfdb9c4cf
   e:	84 c0                	test   %al,%al
  10:	74 22                	je     0x34
  12:	e8 98 d1 d3 fd       	call   0xfdd3d1af
  17:	e9 5a 01 00 00       	jmp    0x176
  1c:	e8 8e d1 d3 fd       	call   0xfdd3d1af
  21:	48 8d 3d b7 46 f8 0a 	lea    0xaf846b7(%rip),%rdi        # 0xaf846df
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 b3 fc ff ff       	jmp    0xfffffce7
  34:	e8 c6 bb e5 06       	call   0x6e5bbff
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi