devdanzin/structseq_null_deref.md

Created March 18, 2026 10:07

Star (0) You must be signed in to star a gist
Fork (0) You must be signed in to fork a gist

Select an option

Learn more about clone URLs
Clone this repository at <script src="https://gist.github.com/devdanzin/4fe9c3299dd2269bd849bba147ade0b4.js"></script>
Save devdanzin/4fe9c3299dd2269bd849bba147ade0b4 to your computer and use it in GitHub Desktop.

Download ZIP

structseq.c: NULL dereference in get_type_attr_as_size

Raw

structseq_null_deref.md

structseq.c: NULL dereference in get_type_attr_as_size

Summary

When PyDict_GetItemWithError returns NULL due to error (not missing key), code falls through to PyLong_AsSsize_t(NULL) at line 37 → segfault. Affects PyStructSequence_New, structseq_new_impl, etc.

Fix

Add early return when v == NULL && PyErr_Occurred().

devdanzin/structseq_null_deref.md

Select an option

No results found

Select an option

No results found

structseq.c: NULL dereference in get_type_attr_as_size

Summary

Fix