netfilter: xtables: fix mangle tables

In POST_ROUTING hook, calling dev_net(in) is going to oops.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/ipv4/netfilter/iptable_mangle.c b/net/ipv4/netfilter/iptable_mangle.c
index 58d7097..c833330 100644 (file)
--- a/net/ipv4/netfilter/iptable_mangle.c
+++ b/net/ipv4/netfilter/iptable_mangle.c
@@ -87,7 +87,9 @@ iptable_mangle_hook(unsigned int hook,
 {
        if (hook == NF_INET_LOCAL_OUT)
                return ipt_local_hook(hook, skb, in, out, okfn);
 {
        if (hook == NF_INET_LOCAL_OUT)
                return ipt_local_hook(hook, skb, in, out, okfn);

-
+       if (hook == NF_INET_POST_ROUTING)
+               return ipt_do_table(skb, hook, in, out,
+                                   dev_net(out)->ipv4.iptable_mangle);

        /* PREROUTING/INPUT/FORWARD: */
        return ipt_do_table(skb, hook, in, out,
                            dev_net(in)->ipv4.iptable_mangle);
        /* PREROUTING/INPUT/FORWARD: */
        return ipt_do_table(skb, hook, in, out,
                            dev_net(in)->ipv4.iptable_mangle);

diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index dc803b7..b6216de 100644 (file)
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -81,7 +81,9 @@ ip6table_mangle_hook(unsigned int hook, struct sk_buff *skb,
 {
        if (hook == NF_INET_LOCAL_OUT)
                return ip6t_local_out_hook(hook, skb, out, okfn);
 {
        if (hook == NF_INET_LOCAL_OUT)
                return ip6t_local_out_hook(hook, skb, out, okfn);

-
+       if (hook == NF_INET_POST_ROUTING)
+               return ip6t_do_table(skb, hook, in, out,
+                                    dev_net(out)->ipv6.ip6table_mangle);

        /* INPUT/FORWARD */
        return ip6t_do_table(skb, hook, in, out,
                             dev_net(in)->ipv6.ip6table_mangle);
        /* INPUT/FORWARD */
        return ip6t_do_table(skb, hook, in, out,
                             dev_net(in)->ipv6.ip6table_mangle);