BTRFS info (device loop4): block group has cluster?: no
BTRFS info (device loop4): 0 free space entries at or bigger than 4096 bytes
BTRFS info (device loop4): 4190208 bytes available across all block groups
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:4097 at do_chunk_alloc fs/btrfs/block-group.c:4097 [inline], CPU#1: kworker/u8:3/50
WARNING: fs/btrfs/block-group.c:4097 at btrfs_chunk_alloc+0x101d/0x15e0 fs/btrfs/block-group.c:4338, CPU#1: kworker/u8:3/50
Modules linked in:
CPU: 1 UID: 0 PID: 50 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4097 [inline]
RIP: 0010:btrfs_chunk_alloc+0x101f/0x15e0 fs/btrfs/block-group.c:4338
Code: a7 66 bb fd e9 6d 01 00 00 e8 fd 81 a0 fd 84 c0 74 22 e8 94 66 bb fd e9 5a 01 00 00 e8 8a 66 bb fd 48 8d 3d 23 39 f0 0b 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 b2 7d 91 07 41 89 c6 31 ff 89 c6
RSP: 0018:ffffc90000bb7730 EFLAGS: 00010293
RAX: ffffffff8408e6c6 RBX: ffffffffffffffe4 RCX: ffff8880212b1e40
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8ff91ff0
RBP: 0000000000000000 R08: ffff8880212b1e40 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: 1ffff1100a531f16
R13: ffff888032d18e40 R14: ffff88807ce4c001 R15: ffff888028427000
FS:  0000000000000000(0000) GS:ffff8881257df000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c360f5f CR3: 0000000033ead000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 flush_space+0x353/0xd30 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:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 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:	a7                   	cmpsl  %es:(%rdi),%ds:(%rsi)
   1:	66 bb fd e9          	mov    $0xe9fd,%bx
   5:	6d                   	insl   (%dx),%es:(%rdi)
   6:	01 00                	add    %eax,(%rax)
   8:	00 e8                	add    %ch,%al
   a:	fd                   	std
   b:	81 a0 fd 84 c0 74 22 	andl   $0x6694e822,0x74c084fd(%rax)
  12:	e8 94 66
  15:	bb fd e9 5a 01       	mov    $0x15ae9fd,%ebx
  1a:	00 00                	add    %al,(%rax)
  1c:	e8 8a 66 bb fd       	call   0xfdbb66ab
  21:	48 8d 3d 23 39 f0 0b 	lea    0xbf03923(%rip),%rdi        # 0xbf0394b
  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 b2 7d 91 07       	call   0x7917deb
  39:	41 89 c6             	mov    %eax,%r14d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi