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 (5341)
BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
BTRFS info (device loop0): using crc32c (crc32c-lib) checksum algorithm
BTRFS info (device loop0): setting nodatasum
BTRFS info (device loop0): allowing degraded mounts
BTRFS info (device loop0): disabling tree log
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
fuse: Bad value for 'user_id'
fuse: Bad value for 'user_id'
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: Transaction aborted (error -28)
WARNING: fs/btrfs/transaction.c:2036 at cleanup_transaction fs/btrfs/transaction.c:2036 [inline], CPU#0: syz.0.0/5341
WARNING: fs/btrfs/transaction.c:2036 at btrfs_commit_transaction+0x30f7/0x3b10 fs/btrfs/transaction.c:2629, CPU#0: syz.0.0/5341
Modules linked in:
CPU: 0 UID: 0 PID: 5341 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~bpo12+1 04/01/2014
RIP: 0010:cleanup_transaction fs/btrfs/transaction.c:2036 [inline]
RIP: 0010:btrfs_commit_transaction+0x30ff/0x3b10 fs/btrfs/transaction.c:2629
Code: 97 20 ef fd eb 7d e8 00 16 d5 fd 84 c0 74 25 e8 87 20 ef fd eb 6d e8 80 20 ef fd 48 8d 3d 09 39 b9 0b 44 8b 6c 24 38 44 89 ee <67> 48 0f b9 3a e9 24 f9 ff ff e8 92 bf 89 07 89 c3 31 ff 89 c6 e8
RSP: 0018:ffffc9000e0474e0 EFLAGS: 00010283
RAX: ffffffff83d1e6e0 RBX: ffff8880428cc001 RCX: 0000000000100000
RDX: ffffc90020f12000 RSI: 00000000ffffffe4 RDI: ffffffff8f8b1ff0
RBP: ffffc9000e047808 R08: ffff888032fd8000 R09: 0000000000000003
R10: 00000000fffffffb R11: 0000000000000002 R12: 1ffff110024b0d0d
R13: 00000000ffffffe4 R14: 0000000000000000 R15: ffff8880428cc000
FS:  00007f94c09f56c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94b85ff000 CR3: 000000001f36d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 prepare_to_relocate+0x39f/0x490 fs/btrfs/relocation.c:3479
 relocate_block_group+0x132/0xd70 fs/btrfs/relocation.c:3504
 btrfs_relocate_block_group+0x6b6/0xc70 fs/btrfs/relocation.c:3966
 btrfs_relocate_chunk+0x12f/0x5c0 fs/btrfs/volumes.c:3424
 __btrfs_balance+0x18ff/0x24e0 fs/btrfs/volumes.c:4197
 btrfs_balance+0xac2/0x11b0 fs/btrfs/volumes.c:4571
 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3525
 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+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94c458f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f94c09f5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f94c47e5fa0 RCX: 00007f94c458f7c9
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f94c4613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94c47e6038 R14: 00007f94c47e5fa0 R15: 00007ffc7c1cec68
 </TASK>
----------------
Code disassembly (best guess):
   0:	97                   	xchg   %eax,%edi
   1:	20 ef                	and    %ch,%bh
   3:	fd                   	std
   4:	eb 7d                	jmp    0x83
   6:	e8 00 16 d5 fd       	call   0xfdd5160b
   b:	84 c0                	test   %al,%al
   d:	74 25                	je     0x34
   f:	e8 87 20 ef fd       	call   0xfdef209b
  14:	eb 6d                	jmp    0x83
  16:	e8 80 20 ef fd       	call   0xfdef209b
  1b:	48 8d 3d 09 39 b9 0b 	lea    0xbb93909(%rip),%rdi        # 0xbb9392b
  22:	44 8b 6c 24 38       	mov    0x38(%rsp),%r13d
  27:	44 89 ee             	mov    %r13d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 24 f9 ff ff       	jmp    0xfffff958
  34:	e8 92 bf 89 07       	call   0x789bfcb
  39:	89 c3                	mov    %eax,%ebx
  3b:	31 ff                	xor    %edi,%edi
  3d:	89 c6                	mov    %eax,%esi
  3f:	e8                   	.byte 0xe8