hacnho/joblib-inline-array-shape-allocation-poc

Joblib inline shape allocation PoC

This repository contains a benign security research proof of concept for a tiny Joblib artifact that triggers a large allocation attempt during normal joblib.load() parsing.

Files:

• joblib-inline-shape-1200m.joblib
• build_poc.py

Reproduction:

OPENBLAS_NUM_THREADS=1 OMP_NUM_THREADS=1 MKL_NUM_THREADS=1 bash -lc '
ulimit -v 300000
python3 - <<'"'"'PY'"'"'
import joblib
joblib.load("joblib-inline-shape-1200m.joblib")
PY
'

Expected observable:

• joblib.load() raises an allocation failure for about 1.12 GiB
• on a looser memory limit, the same path later reaches EOF: reading array data, showing validation happens after allocation

This repository is for defensive security validation and triage only.