dpif-netlink: Fix potential leak of a malformed meters netlink reply.

If netlink transaction returns malformed or otherwise not parsable
reply, it should be freed, as callers will not do that on failure.

Found while reading the code.

Fixes: 80738e5 ("dpif-netlink: Add meter support.")
Acked-by: Aaron Conole <[email protected]>
Signed-off-by: Ilya Maximets <[email protected]>

Author: igsilya

lib/dpif-netlink.c

@@ -4083,6 +4083,7 @@ dpif_netlink_meter_transact(struct ofpbuf *request, struct ofpbuf **replyp,
         static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
         VLOG_DBG_RL(&rl,
                     "Kernel module response to meter tranaction is invalid");
+        ofpbuf_delete(*replyp);
         return EINVAL;
     }
     return 0;