fib: Fix fib zone and its hash leak on namespace stop

When we stop a namespace we flush the table and free one, but the
added fn_zone-s (and their hashes if grown) are leaked. Need to free.
Tries releases all its stuff in the flushing code.

Shame on us - this bug exists since the very first make-fib-per-net
patches in 2.6.27 :(

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index b232375a0b75..b3acb0417b21 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -716,6 +716,24 @@ int fib_table_flush(struct fib_table *tb)
         return found;
 }
 
+void fib_free_table(struct fib_table *tb)
+{
+        struct fn_hash *table = (struct fn_hash *) tb->tb_data;
+        struct fn_zone *fz, *next;
+
+        next = table->fn_zone_list;
+        while (next != NULL) {
+                fz = next;
+                next = fz->fz_next;
+
+                if (fz->fz_hash != fz->fz_embedded_hash)
+                        fz_hash_free(fz->fz_hash, fz->fz_divisor);
+
+                kfree(fz);
+        }
+
+        kfree(tb);
+}
 
 static inline int
 fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,