loop0: detected capacity change from 0 to 32768
BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5325)
BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
BTRFS info (device loop0): using crc32c checksum algorithm
BTRFS info (device loop0): setting nodatasum
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): disabling tree log
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
BTRFS info (device loop0): max_inline set to 0
BTRFS info (device loop0): balance: start -s
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.0.0/5325
Modules linked in:
CPU: 0 UID: 0 PID: 5325 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 70 8d a0 fd eb 1c e8 49 e8 c3 07 e8 64 8d a0 fd eb 10 e8 5d 8d a0 fd eb 09 e8 56 8d 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:ffffc9000f917960 EFLAGS: 00010283
RAX: ffffffff8427ac9a RBX: ffffffffffffffe4 RCX: 0000000000100000
RDX: ffffc9000ef09000 RSI: 000000000001e2a7 RDI: 000000000001e2a8
RBP: ffffc9000f917a98 R08: ffff888035b28000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 1ffff92001f22f3c
R13: ffff8880544a0000 R14: ffff8880544a0001 R15: dffffc0000000000
FS:  00007f929e0c06c0(0000) GS:ffff88808b0b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7cf6d020 CR3: 00000000457fc000 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: 0033:0x7f929d19f559
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:00007f929e0bffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f929d425fa0 RCX: 00007f929d19f559
RDX: 0000200000021ec0 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f929d236b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f929d426038 R14: 00007f929d425fa0 R15: 00007ffc31b3cf98
 </TASK>