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Check the result of PySet_Contains() for error in Python/symtable.c (GH-109146)

This commit is contained in:
Serhiy Storchaka 2023-09-08 19:57:41 +03:00 committed by GitHub
parent 501f2dc527
commit 87a7faf6b6
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 57 additions and 15 deletions
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72
Python/symtable.c
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@ -523,6 +523,7 @@ analyze_name(PySTEntryObject *ste, PyObject *scopes, PyObject *name, long flags,
PyObject *bound, PyObject *local, PyObject *free,
PyObject *global, PyObject *type_params, PySTEntryObject *class_entry)
{
int contains;
if (flags & DEF_GLOBAL) {
if (flags & DEF_NONLOCAL) {
PyErr_Format(PyExc_SyntaxError,
@ -543,14 +544,22 @@ analyze_name(PySTEntryObject *ste, PyObject *scopes, PyObject *name, long flags,
"nonlocal declaration not allowed at module level");
return error_at_directive(ste, name);
}
if (!PySet_Contains(bound, name)) {
contains = PySet_Contains(bound, name);
if (contains < 0) {
return 0;
}
if (!contains) {
PyErr_Format(PyExc_SyntaxError,
"no binding for nonlocal '%U' found",
name);
return error_at_directive(ste, name);
}
if (PySet_Contains(type_params, name)) {
contains = PySet_Contains(type_params, name);
if (contains < 0) {
return 0;
}
if (contains) {
PyErr_Format(PyExc_SyntaxError,
"nonlocal binding not allowed for type parameter '%U'",
name);
@ -599,17 +608,29 @@ analyze_name(PySTEntryObject *ste, PyObject *scopes, PyObject *name, long flags,
Note that having a non-NULL bound implies that the block
is nested.
*/
if (bound && PySet_Contains(bound, name)) {
SET_SCOPE(scopes, name, FREE);
ste->ste_free = 1;
return PySet_Add(free, name) >= 0;
if (bound) {
contains = PySet_Contains(bound, name);
if (contains < 0) {
return 0;
}
if (contains) {
SET_SCOPE(scopes, name, FREE);
ste->ste_free = 1;
return PySet_Add(free, name) >= 0;
}
}
/* If a parent has a global statement, then call it global
explicit? It could also be global implicit.
*/
if (global && PySet_Contains(global, name)) {
SET_SCOPE(scopes, name, GLOBAL_IMPLICIT);
return 1;
if (global) {
contains = PySet_Contains(global, name);
if (contains < 0) {
return 0;
}
if (contains) {
SET_SCOPE(scopes, name, GLOBAL_IMPLICIT);
return 1;
}
}
if (ste->ste_nested)
ste->ste_free = 1;
@ -712,8 +733,19 @@ analyze_cells(PyObject *scopes, PyObject *free, PyObject *inlined_cells)
scope = PyLong_AS_LONG(v);
if (scope != LOCAL)
continue;
if (!PySet_Contains(free, name) && !PySet_Contains(inlined_cells, name))
continue;
int contains = PySet_Contains(free, name);
if (contains < 0) {
goto error;
}
if (!contains) {
contains = PySet_Contains(inlined_cells, name);
if (contains < 0) {
goto error;
}
if (!contains) {
continue;
}
}
/* Replace LOCAL with CELL for this name, and remove
from free. It is safe to replace the value of name
in the dict, because it will not cause a resize.
@ -764,7 +796,11 @@ update_symbols(PyObject *symbols, PyObject *scopes,
long scope, flags;
assert(PyLong_Check(v));
flags = PyLong_AS_LONG(v);
if (PySet_Contains(inlined_cells, name)) {
int contains = PySet_Contains(inlined_cells, name);
if (contains < 0) {
return 0;
}
if (contains) {
flags |= DEF_COMP_CELL;
}
v_scope = PyDict_GetItemWithError(scopes, name);
@ -822,9 +858,15 @@ update_symbols(PyObject *symbols, PyObject *scopes,
goto error;
}
/* Handle global symbol */
if (bound && !PySet_Contains(bound, name)) {
Py_DECREF(name);
continue; /* it's a global */
if (bound) {
int contains = PySet_Contains(bound, name);
if (contains < 0) {
goto error;
}
if (!contains) {
Py_DECREF(name);
continue; /* it's a global */
}
}
/* Propagate new free symbol up the lexical stack */
if (PyDict_SetItem(symbols, name, v_free) < 0) {