BTRFS info (device loop0): balance: start -sconvert=raid0,soft,drange=1580..7
BTRFS info (device loop0): relocating block group 8519680 flags system
BTRFS info (device loop0): relocating block group 1048576 flags system
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/volumes.c:3477 at btrfs_remove_chunk+0xe12/0x15b0 fs/btrfs/volumes.c:3477, CPU#0: syz.0.0/5336
Modules linked in:
CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 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
RIP: 0010:btrfs_remove_chunk+0xe19/0x15b0 fs/btrfs/volumes.c:3477
Code: fe 00 00 00 e8 c8 24 af fd 84 c0 74 27 e8 ef 1d ca fd e9 eb 00 00 00 e8 e5 1d ca fd 48 8d 3d 6e 25 3e 0c 48 8b 5c 24 18 89 de <67> 48 0f b9 3a e9 12 01 00 00 e8 48 d2 ad 07 89 c3 31 ff 89 c6 e8
RSP: 0018:ffffc9000e3cf940 EFLAGS: 00010287
RAX: ffffffff83fba83b RBX: ffffffffffffffe4 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000ffffffe4 RDI: ffffffff9039cdb0
RBP: ffffc9000e3cfa90 R08: ffff88801f822540 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: ffff888012f74700
R13: ffff888011e84060 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f0f5dc9a6c0(0000) GS:ffff88808c895000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003740 CR3: 000000003550a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_relocate_chunk_finish fs/btrfs/volumes.c:3565 [inline]
 btrfs_relocate_chunk+0x3ed/0x820 fs/btrfs/volumes.c:3619
 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4509
 btrfs_balance+0xaf3/0x11b0 fs/btrfs/volumes.c:4896
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3453
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f5cd9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0f5dc99fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0f5d016090 RCX: 00007f0f5cd9ce59
RDX: 0000200000000780 RSI: 00000000c4009420 RDI: 0000000000000007
RBP: 00007f0f5ce32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0f5d016128 R14: 00007f0f5d016090 R15: 00007ffd61a18ff8
 </TASK>
----------------
Code disassembly (best guess):
   0:	fe 00                	incb   (%rax)
   2:	00 00                	add    %al,(%rax)
   4:	e8 c8 24 af fd       	call   0xfdaf24d1
   9:	84 c0                	test   %al,%al
   b:	74 27                	je     0x34
   d:	e8 ef 1d ca fd       	call   0xfdca1e01
  12:	e9 eb 00 00 00       	jmp    0x102
  17:	e8 e5 1d ca fd       	call   0xfdca1e01
  1c:	48 8d 3d 6e 25 3e 0c 	lea    0xc3e256e(%rip),%rdi        # 0xc3e2591
  23:	48 8b 5c 24 18       	mov    0x18(%rsp),%rbx
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 12 01 00 00       	jmp    0x146
  34:	e8 48 d2 ad 07       	call   0x7add281
  39:	89 c3                	mov    %eax,%ebx
  3b:	31 ff                	xor    %edi,%edi
  3d:	89 c6                	mov    %eax,%esi
  3f:	e8                   	.byte 0xe8