BTRFS info (device loop0): balance: start -susage=34359738372,drange=7..2048,limit=0..6 ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:2911 at btrfs_create_pending_block_groups+0x14ae/0x1b40 fs/btrfs/block-group.c:2911, CPU#0: syz.0.17/5888 Modules linked in: CPU: 0 UID: 0 PID: 5888 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:btrfs_create_pending_block_groups+0x14b0/0x1b40 fs/btrfs/block-group.c:2911 Code: 36 04 b5 fd e9 fc 01 00 00 e8 bc da 99 fd 84 c0 74 22 e8 23 04 b5 fd e9 e9 01 00 00 e8 19 04 b5 fd 48 8d 3d 92 7a 84 0b 89 de <67> 48 0f b9 3a e9 bc fc ff ff e8 81 c2 18 07 41 89 c4 31 ff 89 c6 RSP: 0018:ffffc90003c7f720 EFLAGS: 00010293 RAX: ffffffff840fc807 RBX: 00000000ffffffe4 RCX: ffff88802a0c1ec0 RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff8f9442a0 RBP: ffffc90003c7f988 R08: ffff88802a0c1ec0 R09: 0000000000000003 R10: 0000000000000100 R11: 00000000fffffffb R12: dffffc0000000000 R13: fffff5200078ff00 R14: 0000000000000000 R15: ffff88802910c001 FS: 00005555938b9500(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33b63fff CR3: 0000000045ad0000 CR4: 00000000003526f0 Call Trace: __btrfs_end_transaction+0x140/0x650 fs/btrfs/transaction.c:1091 btrfs_inc_block_group_ro+0x647/0x7c0 fs/btrfs/block-group.c:3212 btrfs_relocate_block_group+0x28f/0xb70 fs/btrfs/relocation.c:5377 btrfs_relocate_chunk+0x115/0x830 fs/btrfs/volumes.c:3598 __btrfs_balance+0x1dbf/0x2af0 fs/btrfs/volumes.c:4509 btrfs_balance+0xaf3/0x11b0 fs/btrfs/volumes.c:4896 btrfs_ioctl_balance+0x3d6/0x610 fs/btrfs/ioctl.c:3453 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2b3562cdd9 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:00007fff67f52638 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2b358a5fa0 RCX: 00007f2b3562cdd9 RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 RBP: 00007f2b356c2d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2b358a5fac R14: 00007f2b358a5fa0 R15: 00007f2b358a5fa0 ---------------- Code disassembly (best guess): 0: 36 04 b5 ss add $0xb5,%al 3: fd std 4: e9 fc 01 00 00 jmp 0x205 9: e8 bc da 99 fd call 0xfd99daca e: 84 c0 test %al,%al 10: 74 22 je 0x34 12: e8 23 04 b5 fd call 0xfdb5043a 17: e9 e9 01 00 00 jmp 0x205 1c: e8 19 04 b5 fd call 0xfdb5043a 21: 48 8d 3d 92 7a 84 0b lea 0xb847a92(%rip),%rdi # 0xb847aba 28: 89 de mov %ebx,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 bc fc ff ff jmp 0xfffffcf0 34: e8 81 c2 18 07 call 0x718c2ba 39: 41 89 c4 mov %eax,%r12d 3c: 31 ff xor %edi,%edi 3e: 89 c6 mov %eax,%esi