loop0: detected capacity change from 0 to 32768
BTRFS: device fsid e417788f-7a09-42b2-9266-8ddc5d5d35d2 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5347)
BTRFS info (device loop0): first mount of filesystem e417788f-7a09-42b2-9266-8ddc5d5d35d2
BTRFS info (device loop0): using xxhash64 checksum algorithm
BTRFS warning (device loop0): space cache v1 is being deprecated and will be removed in a future release, please use -o space_cache=v2
BTRFS info (device loop0): rebuilding free space tree
BTRFS info (device loop0): disabling free space tree
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
BTRFS info (device loop0): setting nodatasum
BTRFS info (device loop0): allowing degraded mounts
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling disk space caching
BTRFS info (device loop0): force clearing of disk cache
BTRFS info (device loop0): force zlib compression, level 3
BTRFS info (device loop0): balance: start -s
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/block-group.c:2880 at btrfs_create_pending_block_groups+0x14ae/0x1b40 fs/btrfs/block-group.c:2880, CPU#0: syz.0.0/5347
Modules linked in:
CPU: 0 UID: 0 PID: 5347 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_create_pending_block_groups+0x14b0/0x1b40 fs/btrfs/block-group.c:2880
Code: 86 58 b1 fd e9 fc 01 00 00 e8 4c 56 96 fd 84 c0 74 22 e8 73 58 b1 fd e9 e9 01 00 00 e8 69 58 b1 fd 48 8d 3d 62 29 07 0c 89 de <67> 48 0f b9 3a e9 bc fc ff ff e8 e1 4b 9d 07 41 89 c4 31 ff 89 c6
RSP: 0018:ffffc9000e317700 EFLAGS: 00010293
RAX: ffffffff84147c07 RBX: 00000000ffffffe4 RCX: ffff88803fa68000
RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff901ba570
RBP: ffffc9000e317978 R08: ffff88803fa68000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000000 R12: dffffc0000000000
R13: fffff52001c62efc R14: 0000000000000000 R15: ffff888039018001
FS:  00007f3f78cd16c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf570ef00 CR3: 0000000044a0b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __btrfs_end_transaction+0x140/0x640 fs/btrfs/transaction.c:1080
 btrfs_inc_block_group_ro+0x647/0x7c0 fs/btrfs/block-group.c:3181
 btrfs_relocate_block_group+0x39e/0xbc0 fs/btrfs/relocation.c:5367
 btrfs_relocate_chunk+0x115/0x820 fs/btrfs/volumes.c:3590
 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4501
 btrfs_balance+0xafa/0x11f0 fs/btrfs/volumes.c:4888
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3452
 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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f77d9c819
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:00007f3f78cd0fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3f78015fa0 RCX: 00007f3f77d9c819
RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000007
RBP: 00007f3f77e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3f78016038 R14: 00007f3f78015fa0 R15: 00007ffdf570f6d8
 </TASK>
----------------
Code disassembly (best guess):
   0:	86 58 b1             	xchg   %bl,-0x4f(%rax)
   3:	fd                   	std
   4:	e9 fc 01 00 00       	jmp    0x205
   9:	e8 4c 56 96 fd       	call   0xfd96565a
   e:	84 c0                	test   %al,%al
  10:	74 22                	je     0x34
  12:	e8 73 58 b1 fd       	call   0xfdb1588a
  17:	e9 e9 01 00 00       	jmp    0x205
  1c:	e8 69 58 b1 fd       	call   0xfdb1588a
  21:	48 8d 3d 62 29 07 0c 	lea    0xc072962(%rip),%rdi        # 0xc07298a
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 bc fc ff ff       	jmp    0xfffffcf0
  34:	e8 e1 4b 9d 07       	call   0x79d4c1a
  39:	41 89 c4             	mov    %eax,%r12d
  3c:	31 ff                	xor    %edi,%edi
  3e:	89 c6                	mov    %eax,%esi