UPSTREAM PR #1156: fix(server): sanitize LoRA paths and enable dynamic loading #2
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- Implement `sanitize_lora_path` in `SDGenerationParams` to prevent directory traversal attacks via LoRA tags in prompts. - Restrict LoRA paths to be relative and strictly within the configured LoRA directory (no subdirectories allowed, optional? drawback: users cannot organize their LoRAs into subfolders.). - Update server example to pass `lora_model_dir` to `process_and_check`, enabling LoRA extraction from prompts. - Force `LORA_APPLY_AT_RUNTIME` in the server to allow applying LoRAs dynamically per request without reloading the model.
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- Remove the restriction that LoRA models must be in the root of the LoRA directory, allowing them to be organized in subfolders. - Refactor the directory containment check to use `std::mismatch` instead of `lexically_relative` to verify the path is inside the allowed root. - Remove redundant `lexically_normal()` call when resolving file extensions.
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Mirrored from leejet/stable-diffusion.cpp#1156
sanitize_lora_pathinSDGenerationParamsto prevent directory traversal attacks via LoRA tags in prompts.lora_model_dirtoprocess_and_check, enabling LoRA extraction from prompts.LORA_APPLY_AT_RUNTIMEin the server to allow applying LoRAs dynamically per request without reloading the model and avoiding weight accumulation.