netfilter: xt_recent: check for unsupported user space flags

[pandora-kernel.git] / net / netfilter / xt_recent.c

diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index b65eca9..d2e7c80 100644 (file)
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -319,6 +319,11 @@ static bool recent_mt_check(const struct xt_mtchk_param *par)
                get_random_bytes(&hash_rnd, sizeof(hash_rnd));
                hash_rnd_inited = true;
        }
+       if (info->check_set & ~XT_RECENT_VALID_FLAGS) {
+               pr_info(KBUILD_MODNAME ": Unsupported user space flags "
+                       "(%08x)\n", info->check_set);
+               return false;
+       }
        if (hweight8(info->check_set &
                     (XT_RECENT_SET | XT_RECENT_REMOVE |
                      XT_RECENT_CHECK | XT_RECENT_UPDATE)) != 1)