pktgen: Dont leak kernel memory

[safe/jmp/linux-2.6] / net / netfilter / xt_TCPMSS.c

diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index b868f99..eda64c1 100644 (file)
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -73,11 +73,11 @@ tcpmss_mangle_packet(struct sk_buff *skb,
        }
 
        if (info->mss == XT_TCPMSS_CLAMP_PMTU) {
-               if (dst_mtu(skb->dst) <= minlen) {
+               if (dst_mtu(skb_dst(skb)) <= minlen) {
                        if (net_ratelimit())
                                printk(KERN_ERR "xt_TCPMSS: "
                                       "unknown or invalid path-MTU (%u)\n",
-                                      dst_mtu(skb->dst));
+                                      dst_mtu(skb_dst(skb)));
                        return -1;
                }
                if (in_mtu <= minlen) {
@@ -86,7 +86,7 @@ tcpmss_mangle_packet(struct sk_buff *skb,
                                       "invalid path-MTU (%u)\n", in_mtu);
                        return -1;
                }
-               newmss = min(dst_mtu(skb->dst), in_mtu) - minlen;
+               newmss = min(dst_mtu(skb_dst(skb)), in_mtu) - minlen;
        } else
                newmss = info->mss;
 
@@ -174,15 +174,13 @@ static u_int32_t tcpmss_reverse_mtu(const struct sk_buff *skb,
 }
 
 static unsigned int
-tcpmss_tg4(struct sk_buff *skb, const struct net_device *in,
-           const struct net_device *out, unsigned int hooknum,
-           const struct xt_target *target, const void *targinfo)
+tcpmss_tg4(struct sk_buff *skb, const struct xt_target_param *par)
 {
        struct iphdr *iph = ip_hdr(skb);
        __be16 newlen;
        int ret;
 
-       ret = tcpmss_mangle_packet(skb, targinfo,
+       ret = tcpmss_mangle_packet(skb, par->targinfo,
                                   tcpmss_reverse_mtu(skb, PF_INET),
                                   iph->ihl * 4,
                                   sizeof(*iph) + sizeof(struct tcphdr));
@@ -199,9 +197,7 @@ tcpmss_tg4(struct sk_buff *skb, const struct net_device *in,
 
 #if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
 static unsigned int
-tcpmss_tg6(struct sk_buff *skb, const struct net_device *in,
-           const struct net_device *out, unsigned int hooknum,
-           const struct xt_target *target, const void *targinfo)
+tcpmss_tg6(struct sk_buff *skb, const struct xt_target_param *par)
 {
        struct ipv6hdr *ipv6h = ipv6_hdr(skb);
        u8 nexthdr;
@@ -212,7 +208,7 @@ tcpmss_tg6(struct sk_buff *skb, const struct net_device *in,
        tcphoff = ipv6_skip_exthdr(skb, sizeof(*ipv6h), &nexthdr);
        if (tcphoff < 0)
                return NF_DROP;
-       ret = tcpmss_mangle_packet(skb, targinfo,
+       ret = tcpmss_mangle_packet(skb, par->targinfo,
                                   tcpmss_reverse_mtu(skb, PF_INET6),
                                   tcphoff,
                                   sizeof(*ipv6h) + sizeof(struct tcphdr));
@@ -241,16 +237,13 @@ static inline bool find_syn_match(const struct xt_entry_match *m)
        return false;
 }
 
-static bool
-tcpmss_tg4_check(const char *tablename, const void *entry,
-                 const struct xt_target *target, void *targinfo,
-                 unsigned int hook_mask)
+static bool tcpmss_tg4_check(const struct xt_tgchk_param *par)
 {
-       const struct xt_tcpmss_info *info = targinfo;
-       const struct ipt_entry *e = entry;
+       const struct xt_tcpmss_info *info = par->targinfo;
+       const struct ipt_entry *e = par->entryinfo;
 
        if (info->mss == XT_TCPMSS_CLAMP_PMTU &&
-           (hook_mask & ~((1 << NF_INET_FORWARD) |
+           (par->hook_mask & ~((1 << NF_INET_FORWARD) |
                           (1 << NF_INET_LOCAL_OUT) |
                           (1 << NF_INET_POST_ROUTING))) != 0) {
                printk("xt_TCPMSS: path-MTU clamping only supported in "
@@ -264,16 +257,13 @@ tcpmss_tg4_check(const char *tablename, const void *entry,
 }
 
 #if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
-static bool
-tcpmss_tg6_check(const char *tablename, const void *entry,
-                 const struct xt_target *target, void *targinfo,
-                 unsigned int hook_mask)
+static bool tcpmss_tg6_check(const struct xt_tgchk_param *par)
 {
-       const struct xt_tcpmss_info *info = targinfo;
-       const struct ip6t_entry *e = entry;
+       const struct xt_tcpmss_info *info = par->targinfo;
+       const struct ip6t_entry *e = par->entryinfo;
 
        if (info->mss == XT_TCPMSS_CLAMP_PMTU &&
-           (hook_mask & ~((1 << NF_INET_FORWARD) |
+           (par->hook_mask & ~((1 << NF_INET_FORWARD) |
                           (1 << NF_INET_LOCAL_OUT) |
                           (1 << NF_INET_POST_ROUTING))) != 0) {
                printk("xt_TCPMSS: path-MTU clamping only supported in "