loop0: detected capacity change from 0 to 32768
btrfs: Deprecated parameter 'usebackuproot'
BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead
BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5327)
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): rebuilding free space tree
BTRFS info (device loop0): setting nodatasum
BTRFS info (device loop0): allowing degraded mounts
BTRFS info (device loop0): setting nodatacow
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): using spread ssd allocation scheme
BTRFS info (device loop0): turning on flush-on-commit
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
BTRFS info (device loop0): force clearing of disk cache
BTRFS info (device loop0): trying to use backup root at mount time
BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
BTRFS warning (device loop0): Skipping commit of aborted transaction.
------------[ cut here ]------------
btrfs_abort_should_print_stack(__error)
WARNING: fs/btrfs/transaction.c:2068 at cleanup_transaction+0x727/0x7c0 fs/btrfs/transaction.c:2068, CPU#0: syz.0.0/5327
Modules linked in:
CPU: 0 UID: 0 PID: 5327 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:cleanup_transaction+0x727/0x7c0 fs/btrfs/transaction.c:2068
Code: 08 74 1a 41 83 fc fb 74 0d 41 83 fc f4 75 15 e8 1f a8 ce fd eb 17 e8 18 a8 ce fd eb 10 e8 11 a8 ce fd eb 09 e8 0a a8 ce fd 90 <0f> 0b 90 41 f7 dc e9 44 fa ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000d5c7420 EFLAGS: 00010287
RAX: ffffffff83f7ca06 RBX: ffff888012fc4000 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000297c9 RDI: 00000000000297ca
RBP: ffffc9000d5c7550 R08: ffff88803f7c2540 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 00000000ffffffe4
R13: ffff888052c44bc0 R14: ffff888052c44c20 R15: dffffc0000000000
FS:  00007fe16dd7f6c0(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe168bafec0 CR3: 0000000043b58000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x262c/0x30b0 fs/btrfs/transaction.c:2664
 prepare_to_relocate+0x3db/0x4e0 fs/btrfs/relocation.c:3541
 relocate_block_group+0x141/0xe90 fs/btrfs/relocation.c:3566
 do_nonremap_reloc+0xa7/0x560 fs/btrfs/relocation.c:5323
 btrfs_relocate_block_group+0x6e2/0xaf0 fs/btrfs/relocation.c:5490
 btrfs_relocate_chunk+0x114/0x810 fs/btrfs/volumes.c:3647
 __btrfs_balance+0x1b5f/0x29d0 fs/btrfs/volumes.c:4586
 btrfs_balance+0xaa6/0x1180 fs/btrfs/volumes.c:4973
 btrfs_ioctl_balance+0x3da/0x640 fs/btrfs/ioctl.c:3474
 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: 0033:0x7fe16cf9de59
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:00007fe16dd7efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe16d225fa0 RCX: 00007fe16cf9de59
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000007
RBP: 00007fe16d033e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe16d226038 R14: 00007fe16d225fa0 R15: 00007ffdc4ad5978
 </TASK>