- const int lopt_size = sizeof(struct listen_sock) +
- nr_table_entries * sizeof(struct request_sock *);
- struct listen_sock *lopt = kmalloc(lopt_size, GFP_KERNEL);
-
+ size_t lopt_size = sizeof(struct listen_sock);
+ struct listen_sock *lopt;
+
+ nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog);
+ nr_table_entries = max_t(u32, nr_table_entries, 8);
+ nr_table_entries = roundup_pow_of_two(nr_table_entries + 1);
+ lopt_size += nr_table_entries * sizeof(struct request_sock *);
+ if (lopt_size > PAGE_SIZE)
+ lopt = __vmalloc(lopt_size,
+ GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
+ PAGE_KERNEL);
+ else
+ lopt = kzalloc(lopt_size, GFP_KERNEL);