2 files changed, 14 insertions, 1 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 6ae4bc5ce8a7..65ea31348631 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -957,6 +957,15 @@ struct sec_path {
         struct xfrm_state       *xvec[XFRM_MAX_DEPTH];
 };
 
+static inline int secpath_exists(struct sk_buff *skb)
+{
+#ifdef CONFIG_XFRM
+        return skb->sp != NULL;
+#else
+        return 0;
+#endif
+}
+
 static inline struct sec_path *
 secpath_get(struct sec_path *sp)
 {
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index f162f84b8d6d..22524716fe70 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -44,6 +44,7 @@
 #include <net/arp.h>
 #include <net/ip_fib.h>
 #include <net/rtnetlink.h>
+#include <net/xfrm.h>
 
 #ifndef CONFIG_IP_MULTIPLE_TABLES
 
@@ -211,7 +212,10 @@ int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, u8 tos,
         in_dev = __in_dev_get_rcu(dev);
         if (in_dev) {
                 no_addr = in_dev->ifa_list == NULL;
-                rpf = IN_DEV_RPFILTER(in_dev);
+
+                /* Ignore rp_filter for packets protected by IPsec. */
+                rpf = secpath_exists(skb) ? 0 : IN_DEV_RPFILTER(in_dev);
+
                 accept_local = IN_DEV_ACCEPT_LOCAL(in_dev);
                 fl4.flowi4_mark = IN_DEV_SRC_VMARK(in_dev) ? skb->mark : 0;
         }