BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop0): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4105 at do_chunk_alloc fs/btrfs/block-group.c:4105 [inline], CPU#1: kworker/u8:9/1122
WARNING: fs/btrfs/block-group.c:4105 at btrfs_chunk_alloc+0x1029/0x15f0 fs/btrfs/block-group.c:4346, CPU#1: kworker/u8:9/1122
Modules linked in:
CPU: 1 UID: 0 PID: 1122 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4105 [inline]
RIP: 0010:btrfs_chunk_alloc+0x102b/0x15f0 fs/btrfs/block-group.c:4346
Code: db a7 bb fd e9 6d 01 00 00 e8 c1 a9 a0 fd 84 c0 74 22 e8 c8 a7 bb fd e9 5a 01 00 00 e8 be a7 bb fd 48 8d 3d 87 b2 6a 0b 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 96 38 1a 07 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc9000572f790 EFLAGS: 00010293
RAX: ffffffff8408cf62 RBX: ffffffffffffffe4 RCX: ffff888027de0000
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8f7381f0
RBP: 0000000000000000 R08: ffff888027de0000 R09: 0000000000000003
R10: 0000000000000100 R11: 00000000fffffffb R12: 1ffff110079b3f1e
R13: ffff88804c56a768 R14: ffff888032918001 R15: ffff88806603c800
FS:  0000000000000000(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a995d90a0 CR3: 0000000030970000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 flush_space+0x353/0xd80 fs/btrfs/space-info.c:896
 do_async_reclaim_data_space+0x145/0x520 fs/btrfs/space-info.c:1423
 btrfs_async_reclaim_data_space+0x41/0x90 fs/btrfs/space-info.c:1487
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	db a7 bb fd e9 6d    	(bad) 0x6de9fdbb(%rdi)
   6:	01 00                	add    %eax,(%rax)
   8:	00 e8                	add    %ch,%al
   a:	c1 a9 a0 fd 84 c0 74 	shrl   $0x74,-0x3f7b0260(%rcx)
  11:	22 e8                	and    %al,%ch
  13:	c8 a7 bb fd          	enter  $0xbba7,$0xfd
  17:	e9 5a 01 00 00       	jmp    0x176
  1c:	e8 be a7 bb fd       	call   0xfdbba7df
  21:	48 8d 3d 87 b2 6a 0b 	lea    0xb6ab287(%rip),%rdi        # 0xb6ab2af
  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 96 38 1a 07       	call   0x71a38cf
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi