core options, runahead: check three small allocations

core_option_manager_parse_variable and _parse_option wrote each value's
hash through an unchecked malloc; a failure now fails that option, as
the functions' other failures do. runahead_input_state_set_last read
input_state_list->size after mylist_create could leave it NULL; it now
returns. Not reproduced: needs a failing allocator.

Closes #19838

core_option_manager.c

@@ -724,6 +724,9 @@ static bool core_option_manager_parse_variable(
       const char *value_label = core_option_manager_parse_value_label(
             value, NULL);
 
+      if (!value_hash)
+         goto error;
+
       /* Set value hash */
       *value_hash                     = core_option_manager_hash_string(value);
       option->vals->elems[i].userdata = (void*)value_hash;
@@ -1001,6 +1004,9 @@ static bool core_option_manager_parse_option(
       uint32_t *value_hash    = (uint32_t *)malloc(sizeof(uint32_t));
       const char *value_label = values[i].label;
 
+      if (!value_hash)
+         return false;
+
       /* Append value string
        * > We know that 'value' is always valid */
       string_list_append(option->vals, value, attr);

runahead.c

@@ -1395,6 +1395,8 @@ static void runahead_input_state_set_last(
       mylist_create(&runloop_st->input_state_list, 16,
             input_list_element_constructor,
             input_list_element_destructor);
+   if (!runloop_st->input_state_list)
+      return;
 
    /* Find list item */
    for (i = 0; i < (unsigned)runloop_st->input_state_list->size; i++)