void *xt_copy_counters_from_user(const void __user *user, unsigned int len,
struct xt_counters_info *info, bool compat);
+struct xt_counters *xt_counters_alloc(unsigned int counters);
struct xt_table *xt_register_table(struct net *net,
const struct xt_table *table,
struct arpt_entry *iter;
ret = 0;
- counters = vzalloc(num_counters * sizeof(struct xt_counters));
+ counters = xt_counters_alloc(num_counters);
if (!counters) {
ret = -ENOMEM;
goto out;
struct ipt_entry *iter;
ret = 0;
- counters = vzalloc(num_counters * sizeof(struct xt_counters));
+ counters = xt_counters_alloc(num_counters);
if (!counters) {
ret = -ENOMEM;
goto out;
struct ip6t_entry *iter;
ret = 0;
- counters = vzalloc(num_counters * sizeof(struct xt_counters));
+ counters = xt_counters_alloc(num_counters);
if (!counters) {
ret = -ENOMEM;
goto out;
return 0;
}
+struct xt_counters *xt_counters_alloc(unsigned int counters)
+{
+ struct xt_counters *mem;
+
+ if (counters == 0 || counters > INT_MAX / sizeof(*mem))
+ return NULL;
+
+ counters *= sizeof(*mem);
+ if (counters > XT_MAX_TABLE_SIZE)
+ return NULL;
+
+ return vzalloc(counters);
+}
+EXPORT_SYMBOL(xt_counters_alloc);
+
struct xt_table_info *
xt_replace_table(struct xt_table *table,
unsigned int num_counters,