# Run the automated test script (with timeout protection)
chmod +x test_pypdf.sh
./test_pypdf.sh

# This will:
# 1. Install the vulnerable version of pypdf
# 2. Run test with 15-second timeout
# 3. Show memory consumption behavior

# Install pypdf (vulnerable version 6.6.0)
pip install "pypdf==6.6.0"

# Run with timeout
timeout 10s python3 simple_read_pdf.py malicious_circular_outline.pdf

# Install pypdf (vulnerable version 6.6.0)
pip install "pypdf==6.6.0"

# Run without timeout
python3 simple_read_pdf.py malicious_circular_outline.pdf

def _get_outline(self, node, outline=None):
    while True:  # ❌ NO cycle detection!
        outline_obj = self._build_outline_item(node)
        if outline_obj:
            outline.append(outline_obj)  # ❌ Heap allocation in loop!
        
        if "/Next" not in node:
            break
        node = node["/Next"]  # ❌ Follows circular references