diff options
Diffstat (limited to 'net/netfilter/xt_RATEEST.c')
| -rw-r--r-- | net/netfilter/xt_RATEEST.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/netfilter/xt_RATEEST.c b/net/netfilter/xt_RATEEST.c index d80b8192e0d4..d16d55df4f61 100644 --- a/net/netfilter/xt_RATEEST.c +++ b/net/netfilter/xt_RATEEST.c @@ -11,6 +11,7 @@ #include <linux/jhash.h> #include <linux/rtnetlink.h> #include <linux/random.h> +#include <linux/slab.h> #include <net/gen_stats.h> #include <net/netlink.h> @@ -23,6 +24,7 @@ static DEFINE_MUTEX(xt_rateest_mutex); #define RATEEST_HSIZE 16 static struct hlist_head rateest_hash[RATEEST_HSIZE] __read_mostly; static unsigned int jhash_rnd __read_mostly; +static bool rnd_inited __read_mostly; static unsigned int xt_rateest_hash(const char *name) { @@ -93,6 +95,11 @@ static bool xt_rateest_tg_checkentry(const struct xt_tgchk_param *par) struct gnet_estimator est; } cfg; + if (unlikely(!rnd_inited)) { + get_random_bytes(&jhash_rnd, sizeof(jhash_rnd)); + rnd_inited = true; + } + est = xt_rateest_lookup(info->name); if (est) { /* @@ -164,7 +171,6 @@ static int __init xt_rateest_tg_init(void) for (i = 0; i < ARRAY_SIZE(rateest_hash); i++) INIT_HLIST_HEAD(&rateest_hash[i]); - get_random_bytes(&jhash_rnd, sizeof(jhash_rnd)); return xt_register_target(&xt_rateest_tg_reg); } |