BTRFS info (device loop0): balance: start -susage=34359738372,drange=7..526332,limit=0..6 ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:2918 at btrfs_create_pending_block_groups+0x14ae/0x1b40 fs/btrfs/block-group.c:2918, CPU#0: syz.0.17/6135 Modules linked in: CPU: 0 UID: 0 PID: 6135 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:btrfs_create_pending_block_groups+0x14b0/0x1b40 fs/btrfs/block-group.c:2918 Code: 16 0d b3 fd e9 fc 01 00 00 e8 5c 39 98 fd 84 c0 74 22 e8 03 0d b3 fd e9 e9 01 00 00 e8 f9 0c b3 fd 48 8d 3d 72 51 28 0c 89 de <67> 48 0f b9 3a e9 bc fc ff ff e8 71 4b 9c 07 41 89 c4 31 ff 89 c6 RSP: 0018:ffffc90003697700 EFLAGS: 00010293 RAX: ffffffff84130e37 RBX: 00000000ffffffe4 RCX: ffff888029030000 RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: ffffffff903b5fb0 RBP: ffffc90003697970 R08: ffff888029030000 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000000 R12: dffffc0000000000 R13: fffff520006d2efc R14: 0000000000000000 R15: ffff88805ca64001 FS: 00007f84f6c646c0(0000) GS:ffff88812525c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fd78fa1998 CR3: 00000000742a6000 CR4: 00000000003526f0 Call Trace: __btrfs_end_transaction+0x140/0x640 fs/btrfs/transaction.c:1091 btrfs_inc_block_group_ro+0x647/0x7c0 fs/btrfs/block-group.c:3219 btrfs_relocate_block_group+0x3bb/0xc40 fs/btrfs/relocation.c:5359 btrfs_relocate_chunk+0x115/0x820 fs/btrfs/volumes.c:3598 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4509 btrfs_balance+0xaf3/0x11b0 fs/btrfs/volumes.c:4896 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3452 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/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: 0033:0x7f84f5d9c819 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:00007f84f6c64028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f84f6015fa0 RCX: 00007f84f5d9c819 RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 RBP: 00007f84f5e32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f84f6016038 R14: 00007f84f6015fa0 R15: 00007fff9fa8f4a8 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0d b3 fd e9 fc or $0xfce9fdb3,%eax 5: 01 00 add %eax,(%rax) 7: 00 e8 add %ch,%al 9: 5c pop %rsp a: 39 98 fd 84 c0 74 cmp %ebx,0x74c084fd(%rax) 10: 22 e8 and %al,%ch 12: 03 0d b3 fd e9 e9 add -0x1616024d(%rip),%ecx # 0xe9e9fdcb 18: 01 00 add %eax,(%rax) 1a: 00 e8 add %ch,%al 1c: f9 stc 1d: 0c b3 or $0xb3,%al 1f: fd std 20: 48 8d 3d 72 51 28 0c lea 0xc285172(%rip),%rdi # 0xc285199 27: 89 de mov %ebx,%esi * 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2e: e9 bc fc ff ff jmp 0xfffffcef 33: e8 71 4b 9c 07 call 0x79c4ba9 38: 41 89 c4 mov %eax,%r12d 3b: 31 ff xor %edi,%edi 3d: 89 c6 mov %eax,%esi