loop0: detected capacity change from 0 to 32768
BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5318)
BTRFS info (device loop0): first mount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop0): using sha256 checksum algorithm
BTRFS info (device loop0): rebuilding free space tree
BTRFS info (device loop0): setting nodatasum
BTRFS info (device loop0): setting nodatacow
BTRFS info (device loop0): turning off barriers
BTRFS info (device loop0): turning on sync discard
BTRFS info (device loop0): enabling free space tree
BTRFS info (device loop0): force clearing of disk cache
BTRFS info (device loop0): balance: start -sconvert=raid0,usage=0..9
BTRFS info (device loop0): relocating block group 1048576 flags system
------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/volumes.c:3608 at btrfs_remove_chunk+0xc9b/0x1070 fs/btrfs/volumes.c:3608, CPU#0: syz.0.0/5318
Modules linked in:
CPU: 0 UID: 0 PID: 5318 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+0xc9b/0x1070 fs/btrfs/volumes.c:3608
Code: 24 fb 74 12 83 3c 24 f4 75 1a e8 50 c7 a0 fd eb 1c e8 a9 6a c3 07 e8 44 c7 a0 fd eb 10 e8 3d c7 a0 fd eb 09 e8 36 c7 a0 fd 90 <0f> 0b 90 48 8b 04 24 89 c1 f7 d9 e9 43 fc ff ff 44 89 f1 80 e1 07
RSP: 0018:ffffc9000e52f960 EFLAGS: 00010287
RAX: ffffffff842759ea RBX: ffffffffffffffe4 RCX: 0000000000100000
RDX: ffffc9000eeb2000 RSI: 0000000000020027 RDI: 0000000000020028
RBP: ffffc9000e52fa98 R08: ffff888013074b00 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 1ffff92001ca5f3c
R13: ffff888052f24000 R14: ffff888052f24001 R15: dffffc0000000000
FS:  00007fecd36e66c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f50ec30d120 CR3: 000000000bf98000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_relocate_chunk_finish fs/btrfs/volumes.c:3696 [inline]
 btrfs_relocate_chunk+0x3e5/0x810 fs/btrfs/volumes.c:3750
 __btrfs_balance+0x1b5f/0x29d0 fs/btrfs/volumes.c:4668
 btrfs_balance+0xaa6/0x1180 fs/btrfs/volumes.c:5055
 btrfs_ioctl_balance+0x3da/0x640 fs/btrfs/ioctl.c:3494
 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:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fecd279e1d9
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:00007fecd36e5fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fecd2a25fa0 RCX: 00007fecd279e1d9
RDX: 0000200000000780 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007fecd2835888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fecd2a26038 R14: 00007fecd2a25fa0 R15: 00007ffc51b760b8
 </TASK>