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| author | Christian Heimes <christian@python.org> | 2016-09-08 22:22:28 (GMT) |
|---|---|---|
| committer | Christian Heimes <christian@python.org> | 2016-09-08 22:22:28 (GMT) |
| commit | 45af0c83da093ac8f6756d98c36e064e7c01b19b (patch) | |
| tree | d0a7f44d22680fd5dc774f931db5bcef38809a34 /Python/symtable.c | |
| parent | bb0b0d9ff0c8521ce0e96006ce5382f09ac07c33 (diff) | |
| download | cpython-45af0c83da093ac8f6756d98c36e064e7c01b19b.zip cpython-45af0c83da093ac8f6756d98c36e064e7c01b19b.tar.gz cpython-45af0c83da093ac8f6756d98c36e064e7c01b19b.tar.bz2 | |
Fix potential NULL pointer dereference in update_symbols()
symtable_analyze() calls analyze_block() with bound=NULL. Theoretically
that NULL can be passed down to update_symbols(). update_symbols() may
deference NULL and pass it to PySet_Contains()
Diffstat (limited to 'Python/symtable.c')
| -rw-r--r-- | Python/symtable.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Python/symtable.c b/Python/symtable.c index 3f03184..45a8c2c 100644 --- a/Python/symtable.c +++ b/Python/symtable.c @@ -652,7 +652,7 @@ update_symbols(PyObject *symbols, PyObject *scopes, continue; } /* Handle global symbol */ - if (!PySet_Contains(bound, name)) { + if (bound && !PySet_Contains(bound, name)) { Py_DECREF(name); continue; /* it's a global */ } |