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Diffstat (limited to 'net')
-rw-r--r--net/netfilter/xt_hashlimit.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 962ea4a63d9f..5da8746f7b88 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>");
@@ -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;
}