From 4a757609d131a29ef52eddcae108b7052e13d31b Mon Sep 17 00:00:00 2001 From: Benjamin Peterson Date: Tue, 6 Sep 2016 19:03:40 -0700 Subject: [PATCH] do not memcpy from NULL --- Modules/hashtable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Modules/hashtable.c b/Modules/hashtable.c index 133f3133ef371e..fdddc19cff1bf9 100644 --- a/Modules/hashtable.c +++ b/Modules/hashtable.c @@ -327,7 +327,8 @@ _Py_hashtable_set(_Py_hashtable_t *ht, const void *key, entry->key_hash = key_hash; assert(data_size == ht->data_size); - memcpy(_Py_HASHTABLE_ENTRY_DATA(entry), data, data_size); + if (data) + memcpy(_Py_HASHTABLE_ENTRY_DATA(entry), data, data_size); _Py_slist_prepend(&ht->buckets[index], (_Py_slist_item_t*)entry); ht->entries++;