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 info (device loop0): found 11 extents, stage: move data extents
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5314 at fs/btrfs/extent-tree.c:842 lookup_inline_extent_backref+0x14eb/0x1a00 fs/btrfs/extent-tree.c:842
Modules linked in:
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:lookup_inline_extent_backref+0x14eb/0x1a00 fs/btrfs/extent-tree.c:842
Code: fb c0 00 00 00 73 7d e8 53 2f e8 fd bb f5 ff ff ff e9 96 00 00 00 e8 44 2f e8 fd eb 6c e8 3d 2f e8 fd eb 65 e8 36 2f e8 fd 90 <0f> 0b 90 48 8b 44 24 68 42 80 3c 28 00 74 08 4c 89 ff e8 ce 96 4e
RSP: 0018:ffffc9000d3d6840 EFLAGS: 00010287
RAX: ffffffff83b744fa RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000f14b000 RSI: 0000000000069ce3 RDI: 0000000000069ce4
RBP: ffffc9000d3d6a90 R08: ffffffff83b734cc R09: 1ffffd400021e608
R10: dffffc0000000000 R11: fffff9400021e609 R12: 0000000000000009
R13: dffffc0000000000 R14: ffff888045d8e000 R15: ffff88804224c4d0
FS:  00007f6d7e6256c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d7e603fe0 CR3: 00000000401a0000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 insert_inline_extent_backref+0xd9/0x2b0 fs/btrfs/extent-tree.c:1213
 __btrfs_inc_extent_ref+0x262/0x790 fs/btrfs/extent-tree.c:1511
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2007 [inline]
 __btrfs_run_delayed_refs+0x1078/0x4310 fs/btrfs/extent-tree.c:2077
 btrfs_run_delayed_refs+0x188/0x2c0 fs/btrfs/extent-tree.c:2189
 qgroup_account_snapshot+0xaf/0x3d0 fs/btrfs/transaction.c:1565
 create_pending_snapshot+0x1270/0x2a10 fs/btrfs/transaction.c:1848
 create_pending_snapshots+0x195/0x1d0 fs/btrfs/transaction.c:1919
 btrfs_commit_transaction+0xf11/0x3720 fs/btrfs/transaction.c:2398
 prepare_to_relocate+0x3c4/0x4c0 fs/btrfs/relocation.c:3586
 relocate_block_group+0x16c/0xd40 fs/btrfs/relocation.c:3611
 btrfs_relocate_block_group+0x77d/0xd90 fs/btrfs/relocation.c:4081
 btrfs_relocate_chunk+0x12c/0x3b0 fs/btrfs/volumes.c:3494
 __btrfs_balance+0x1b0f/0x26b0 fs/btrfs/volumes.c:4278
 btrfs_balance+0xbdc/0x10c0 fs/btrfs/volumes.c:4655
 btrfs_ioctl_balance+0x493/0x7c0 fs/btrfs/ioctl.c:3670
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d7d785d29
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:00007f6d7e625038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6d7d976080 RCX: 00007f6d7d785d29
RDX: 0000000020000180 RSI: 00000000c4009420 RDI: 0000000000000006
RBP: 00007f6d7d801aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6d7d976080 R15: 00007ffd73d25cf8
 </TASK>