devdanzin/ceval_stackref_oom.md

Created March 18, 2026 10:06

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/55ed5cf0d452eb6ce881e7a8fad30ddb.js"></script>
Save devdanzin/55ed5cf0d452eb6ce881e7a8fad30ddb to your computer and use it in GitHub Desktop.

Download ZIP

ceval.c: Missing PyErr_NoMemory in _PyObjectArray_FromStackRefArray + PyEval_GetLocals NULL deref

Raw

ceval_stackref_oom.md

ceval.c: Missing PyErr_NoMemory in _PyObjectArray_FromStackRefArray + PyEval_GetLocals NULL deref

Summary

_PyObjectArray_FromStackRefArray (line 1112): PyMem_Malloc returns NULL without exception. Affects ~10 vectorcall functions → SystemError.
PyEval_GetLocals (line 2622): _PyFrame_GetFrameObject can return NULL, immediately dereferenced → segfault.

Fix

Add PyErr_NoMemory() after PyMem_Malloc failure.
Add NULL check after _PyFrame_GetFrameObject.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment