1 files changed, 23 insertions, 11 deletions

diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index cfb249cc0a58..1e589b91605e 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1989,6 +1989,10 @@ static struct node *fib_trie_get_next(struct fib_trie_iter *iter)
         unsigned cindex = iter->index;
         struct tnode *p;
 
+        /* A single entry routing table */
+        if (!tn)
+                return NULL;
+
         pr_debug("get_next iter={node=%p index=%d depth=%d}\n",
                  iter->tnode, iter->index, iter->depth);
 rescan:
@@ -2037,11 +2041,18 @@ static struct node *fib_trie_get_first(struct fib_trie_iter *iter,
         if(!iter)
                 return NULL;
 
-        if (n && IS_TNODE(n)) {
-                iter->tnode = (struct tnode *) n;
-                iter->trie = t;
-                iter->index = 0;
-                iter->depth = 1;
+        if (n) {
+                if (IS_TNODE(n)) {
+                        iter->tnode = (struct tnode *) n;
+                        iter->trie = t;
+                        iter->index = 0;
+                        iter->depth = 1;
+                } else {
+                        iter->tnode = NULL;
+                        iter->trie  = t;
+                        iter->index = 0;
+                        iter->depth = 0;
+                }
                 return n;
         }
         return NULL;
@@ -2279,16 +2290,17 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
         if (v == SEQ_START_TOKEN)
                 return 0;
 
+        if (!NODE_PARENT(n)) {
+                if (iter->trie == trie_local)
+                        seq_puts(seq, "<local>:\n");
+                else
+                        seq_puts(seq, "<main>:\n");
+        }
+
         if (IS_TNODE(n)) {
                 struct tnode *tn = (struct tnode *) n;
                 __be32 prf = htonl(MASK_PFX(tn->key, tn->pos));
 
-                if (!NODE_PARENT(n)) {
-                        if (iter->trie == trie_local)
-                                seq_puts(seq, "<local>:\n");
-                        else
-                                seq_puts(seq, "<main>:\n");
-                } 
                 seq_indent(seq, iter->depth-1);
                 seq_printf(seq, "  +-- %d.%d.%d.%d/%d %d %d %d\n",
                            NIPQUAD(prf), tn->pos, tn->bits, tn->full_children,