BTRFS info (device loop6): balance: start -sconvert=dup,soft,usage=8,limit=2
BTRFS info (device loop6): relocating block group 1048576 flags system
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/volumes.c:3470 at btrfs_remove_chunk+0xe0d/0x15f0, CPU#0: syz.6.92/6655
Modules linked in:
CPU: 0 UID: 0 PID: 6655 Comm: syz.6.92 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:btrfs_remove_chunk+0xe10/0x15f0
Code: 93 cf fd e9 ee 00 00 00 e8 cd a6 b4 fd 84 c0 74 23 e8 64 93 cf fd e9 db 00 00 00 e8 5a 93 cf fd 48 8d 3d 13 e0 24 0c 44 89 ee <67> 48 0f b9 3a e9 02 01 00 00 e8 61 4a b8 07 89 c3 31 ff 89 c6 e8
RSP: 0018:ffffc90003f57940 EFLAGS: 00010283
RAX: ffffffff83f60d86 RBX: ffff88810b648001 RCX: 0000000000080000
RDX: ffffc900083b1000 RSI: 00000000ffffffe4 RDI: ffffffff901aeda0
RBP: ffffc90003f57a90 R08: ffff88816b278000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: ffff88811e0d25c8
R13: ffffffffffffffe4 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fc00847e6c0(0000) GS:ffff88818de60000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc0075e9e80 CR3: 000000016f416000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 btrfs_relocate_chunk+0x3ed/0x820
 __btrfs_balance+0x1db0/0x2ae0
 btrfs_balance+0xafa/0x11f0
 btrfs_ioctl_balance+0x3d3/0x610
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc00759c799
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:00007fc00847e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc007815fa0 RCX: 00007fc00759c799
RDX: 0000200000000780 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007fc007632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc007816038 R14: 00007fc007815fa0 R15: 00007ffdb6d30718
 </TASK>
