BTRFS info (device loop0): using xxhash64 (xxhash64-generic) checksum algorithm
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): balance: start -susage=34359738372,drange=7..526332,limit=0..6
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5133 at fs/btrfs/block-group.c:2441 btrfs_create_pending_block_groups+0xca1/0xec0 fs/btrfs/block-group.c:2441
Modules linked in:
CPU: 0 PID: 5133 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:btrfs_create_pending_block_groups+0xca1/0xec0 fs/btrfs/block-group.c:2441
Code: e8 e4 b2 13 fe 48 8b 5c 24 28 0f 1f 44 00 00 e8 d5 b2 13 fe eb 4a e8 ce b2 13 fe 48 c7 c7 20 1e 6d 8a 44 89 fe e8 8f 57 4c 06 <0f> 0b 48 8b 7c 24 30 48 c7 c6 a0 1e 6d 8a ba 89 09 00 00 44 89 f9
RSP: 0018:ffffc90002e4f780 EFLAGS: 00010246
RAX: ad8ffbfc255f3a00 RBX: 1ffff11004b1550b RCX: ffff888020631dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002e4f9a0 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffff8880258aa9b0
R13: ffff8880258aa850 R14: ffff8880258aa858 R15: 00000000ffffffe4
FS:  00007fef07de06c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005598ef113a10 CR3: 000000007b05a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __btrfs_end_transaction+0x154/0x650 fs/btrfs/transaction.c:1017
 btrfs_inc_block_group_ro+0x59d/0x600 fs/btrfs/block-group.c:2664
 btrfs_relocate_block_group+0x38d/0xad0 fs/btrfs/relocation.c:4074
 btrfs_relocate_chunk+0xaa/0x290 fs/btrfs/volumes.c:3338
 __btrfs_balance+0x15f4/0x22b0 fs/btrfs/volumes.c:4085
 btrfs_balance+0xda6/0x1540 fs/btrfs/volumes.c:4475
 btrfs_ioctl_balance+0x674/0x810 fs/btrfs/ioctl.c:4150
 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: 0033:0x7fef0877c379
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:00007fef07de0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fef089b7fa0 RCX: 00007fef0877c379
RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003
RBP: 00007fef0880fd68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fef089b8038 R14: 00007fef089b7fa0 R15: 00007fff3aec0658
 </TASK>