1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index bc59d0d6e89e..91d5ea1dbbc9 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -102,6 +102,10 @@ ip_nat_fn(unsigned int hooknum,
                 return NF_ACCEPT;
         }
 
+        /* Don't try to NAT if this packet is not conntracked */
+        if (ct == &ip_conntrack_untracked)
+                return NF_ACCEPT;
+
         switch (ctinfo) {
         case IP_CT_RELATED:
         case IP_CT_RELATED+IP_CT_IS_REPLY: