BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
BTRFS info (device loop0): checking UUID tree
BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4792 at fs/btrfs/volumes.c:3259 btrfs_remove_chunk+0x14a2/0x19c0 fs/btrfs/volumes.c:3259
Modules linked in:
CPU: 1 PID: 4792 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:btrfs_remove_chunk+0x14a2/0x19c0 fs/btrfs/volumes.c:3259
Code: e9 5b fb ff ff e8 de 90 30 fe 0f 1f 44 00 00 e8 d4 90 30 fe eb 16 e8 cd 90 30 fe 48 c7 c7 00 74 4b 8a 44 89 f6 e8 fe ed 56 06 <0f> 0b 4c 89 e7 48 c7 c6 60 77 4b 8a ba bb 0c 00 00 e9 20 fb ff ff
RSP: 0018:ffffc9000316f920 EFLAGS: 00010246
RAX: 101ac4a461150000 RBX: ffff888021de0001 RCX: ffff88802b723b80
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000316fad8 R08: dffffc0000000000 R09: ffffed1017224f24
R10: ffffed1017224f24 R11: 1ffff11017224f23 R12: ffff888073a0c840
R13: dffffc0000000000 R14: ffffffffffffffe4 R15: 1ffff1100437b9f0
FS:  00007f89f1cab6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89f1c8ad58 CR3: 000000007861d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_relocate_chunk+0x1f5/0x290 fs/btrfs/volumes.c:3376
 __btrfs_balance+0x1641/0x2250 fs/btrfs/volumes.c:4079
 btrfs_balance+0xd89/0x1520 fs/btrfs/volumes.c:4469
 btrfs_ioctl_balance+0x674/0x810 fs/btrfs/ioctl.c:4152
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f89f2929ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f89f1cab0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f89f2a48f80 RCX: 00007f89f2929ae9
RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007f89f297547a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f89f2a48f80 R15: 00007ffd27ad13d8
 </TASK>