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gh-95876: Fix format string in pegen error location code (#95877)

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Christian Heimes 2022-08-11 10:55:57 +02:00 committed by GitHub
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commit b4c857d0fd
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2 changed files with 5 additions and 1 deletions
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Misc/NEWS.d/next/Core and Builtins/2022-08-11-09-19-55.gh-issue-95876.YpQfoV.rst Normal file
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@ -0,0 +1,4 @@
Fix format string in ``_PyPegen_raise_error_known_location`` that can lead
to memory corruption on some 64bit systems. The function was building a
tuple with ``i`` (int) instead of ``n`` (Py_ssize_t) for Py_ssize_t
arguments.

2
Parser/pegen_errors.c
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@ -371,7 +371,7 @@ _PyPegen_raise_error_known_location(Parser *p, PyObject *errtype,
} }
} }
} }
tmp = Py_BuildValue("(OiiNii)", p->tok->filename, lineno, col_number, error_line, end_lineno, end_col_number); tmp = Py_BuildValue("(OnnNnn)", p->tok->filename, lineno, col_number, error_line, end_lineno, end_col_number);
if (!tmp) { if (!tmp) {
goto error; goto error;
} }