BTRFS info (device loop0): balance: start -sconvert=raid0,soft
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:3338 at 0x0, CPU#0: syz.0.0/5355
Modules linked in:
CPU: 0 UID: 0 PID: 5355 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~bpo12+1 04/01/2014
RIP: 0010:btrfs_remove_chunk+0x1775/0x2020 fs/btrfs/volumes.c:3338
Code: f3 e3 fd e9 12 01 00 00 e8 f8 cc c9 fd 84 c0 74 28 e8 8f f3 e3 fd e9 ff 00 00 00 e8 85 f3 e3 fd 48 8d 3d 5e c0 cc 0b 44 89 ee <67> 48 0f b9 3a e9 3e f9 ff ff e8 5c 83 7e 07 e8 d7 8a 7e 07 41 89
RSP: 0018:ffffc9000d7978c0 EFLAGS: 00010293
RAX: ffffffff83ddcd0b RBX: 0000000000000000 RCX: ffff888041484980
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8faa8d70
RBP: ffffc9000d797ab0 R08: ffff888041484980 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffffffffffe4 R14: ffff88804099c001 R15: ffff88804728b818
FS:  00007f498bfb36c0(0000) GS:ffff88808d23e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f504dfd5b50 CR3: 00000000431e4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_relocate_chunk+0x29b/0x5c0 fs/btrfs/volumes.c:3469
 __btrfs_balance+0x18ff/0x24e0 fs/btrfs/volumes.c:4197
 btrfs_balance+0xac2/0x11b0 fs/btrfs/volumes.c:4571
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3525
 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+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f498fb8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f498bfb3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f498fde6180 RCX: 00007f498fb8f7c9
RDX: 0000200000000780 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f498fc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f498fde6218 R14: 00007f498fde6180 R15: 00007ffcc6d42098
 </TASK>
----------------
Code disassembly (best guess):
   0:	f3 e3 fd             	repz jrcxz 0x0
   3:	e9 12 01 00 00       	jmp    0x11a
   8:	e8 f8 cc c9 fd       	call   0xfdc9cd05
   d:	84 c0                	test   %al,%al
   f:	74 28                	je     0x39
  11:	e8 8f f3 e3 fd       	call   0xfde3f3a5
  16:	e9 ff 00 00 00       	jmp    0x11a
  1b:	e8 85 f3 e3 fd       	call   0xfde3f3a5
  20:	48 8d 3d 5e c0 cc 0b 	lea    0xbccc05e(%rip),%rdi        # 0xbccc085
  27:	44 89 ee             	mov    %r13d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 3e f9 ff ff       	jmp    0xfffff972
  34:	e8 5c 83 7e 07       	call   0x77e8395
  39:	e8 d7 8a 7e 07       	call   0x77e8b15
  3e:	41                   	rex.B
  3f:	89                   	.byte 0x89