BTRFS info (device loop1): balance: start -s ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4386 at fs/btrfs/block-group.c:2441 btrfs_create_pending_block_groups+0xc1c/0xe50 fs/btrfs/block-group.c:2441 Modules linked in: CPU: 0 PID: 4386 Comm: syz.1.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:btrfs_create_pending_block_groups+0xc1c/0xe50 fs/btrfs/block-group.c:2441 Code: ed 19 fe eb 27 e8 34 ed 19 fe 0f 1f 44 00 00 e8 2a ed 19 fe eb 4a e8 23 ed 19 fe 48 c7 c7 e0 0a 4d 8a 44 89 fe e8 f4 c8 40 06 <0f> 0b 48 8b 7c 24 20 48 c7 c6 60 0b 4d 8a ba 89 09 00 00 44 89 f9 RSP: 0018:ffffc900046c7780 EFLAGS: 00010246 RAX: d8c0a58fb103f200 RBX: 1ffff1100f851a0b RCX: 0000000000080000 RDX: ffffc90005119000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc900046c79a0 R08: dffffc0000000000 R09: ffffed1017224f2c R10: ffffed1017224f2c R11: 1ffff11017224f2b R12: ffff88807c28d1b0 R13: ffff88807c28d050 R14: ffff88807c28d058 R15: 00000000ffffffe4 FS: 00007fcad1eb16c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32323ff8 CR3: 000000005a9f0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __btrfs_end_transaction+0x154/0x650 fs/btrfs/transaction.c:1016 btrfs_inc_block_group_ro+0x59d/0x600 fs/btrfs/block-group.c:2664 btrfs_relocate_block_group+0x38d/0xad0 fs/btrfs/relocation.c:4061 btrfs_relocate_chunk+0xaa/0x290 fs/btrfs/volumes.c:3338 __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: 0033:0x7fcad3c49fc9 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:00007fcad1eb1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcad3ea0fa0 RCX: 00007fcad3c49fc9 RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000007 RBP: 00007fcad3cccf91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcad3ea1038 R14: 00007fcad3ea0fa0 R15: 00007fff27487fc8