diff options
Diffstat (limited to 'net/netfilter/xt_hashlimit.c')
| -rw-r--r-- | net/netfilter/xt_hashlimit.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 10d48234f5f4c..5da8746f7b88f 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -35,6 +35,7 @@ #include <linux/netfilter_ipv6/ip6_tables.h> #include <linux/netfilter/xt_hashlimit.h> #include <linux/mutex.h> +#include <linux/kernel.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); @@ -279,7 +280,7 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg, size = cfg->size; } else { size = (totalram_pages << PAGE_SHIFT) / 16384 / - sizeof(struct list_head); + sizeof(struct hlist_head); if (totalram_pages > 1024 * 1024 * 1024 / PAGE_SIZE) size = 8192; if (size < 16) @@ -287,7 +288,7 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg, } /* FIXME: don't use vmalloc() here or anywhere else -HW */ hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) + - sizeof(struct list_head) * size); + sizeof(struct hlist_head) * size); if (hinfo == NULL) return -ENOMEM; *out_hinfo = hinfo; @@ -527,12 +528,12 @@ static u64 user2rate(u64 user) } } -static u64 user2rate_bytes(u64 user) +static u64 user2rate_bytes(u32 user) { u64 r; - r = user ? 0xFFFFFFFFULL / user : 0xFFFFFFFFULL; - r = (r - 1) << 4; + r = user ? U32_MAX / user : U32_MAX; + r = (r - 1) << XT_HASHLIMIT_BYTE_SHIFT; return r; } @@ -588,7 +589,8 @@ static void rateinfo_init(struct dsthash_ent *dh, dh->rateinfo.prev_window = 0; dh->rateinfo.current_rate = 0; if (hinfo->cfg.mode & XT_HASHLIMIT_BYTES) { - dh->rateinfo.rate = user2rate_bytes(hinfo->cfg.avg); + dh->rateinfo.rate = + user2rate_bytes((u32)hinfo->cfg.avg); if (hinfo->cfg.burst) dh->rateinfo.burst = hinfo->cfg.burst * dh->rateinfo.rate; @@ -870,7 +872,7 @@ static int hashlimit_mt_check_common(const struct xt_mtchk_param *par, /* Check for overflow. */ if (revision >= 3 && cfg->mode & XT_HASHLIMIT_RATE_MATCH) { - if (cfg->avg == 0) { + if (cfg->avg == 0 || cfg->avg > U32_MAX) { pr_info("hashlimit invalid rate\n"); return -ERANGE; } |