Implements Linux Landlock sandboxing to restrict filesystem access when
ComfyUI is running. This provides defense-in-depth against malicious
custom nodes or workflows that attempt to access sensitive files.
How it works:
- Uses Linux Landlock LSM (kernel 5.13+) via direct syscalls
- Restricts write access to specific directories (output, input, temp, user)
- Restricts read access to only what's needed (codebase, models, system libs)
- Handles ABI versions 1-5, including IOCTL_DEV for GPU access on v5+
- Exits with error if --enable-landlock is set but Landlock unavailable
Write access granted to:
- ComfyUI output, input, temp, and user directories
- System temp directory (for torch/backends)
- SQLite database directory (if configured)
- Paths specified via --landlock-allow-writable
Read access granted to:
- ComfyUI codebase directory
- All configured model directories (including extra_model_paths.yaml)
- Python installation and site-packages
- System libraries (/usr, /lib, /lib64, /opt, /etc, /proc, /sys)
- /nix (on NixOS systems)
- /dev (with ioctl for GPU access)
- Paths specified via --landlock-allow-readable
Usage:
python main.py --enable-landlock
python main.py --enable-landlock --landlock-allow-writable /extra/dir
python main.py --enable-landlock --landlock-allow-readable ~/.cache/huggingface
Requirements:
- Linux with kernel 5.13+ (fails with error on unsupported systems)
- Once enabled, restrictions cannot be lifted for the process lifetime
- Network access is not restricted (Landlock FS only)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
