diff options
| -rw-r--r-- | core/dnsserver/server.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/core/dnsserver/server.go b/core/dnsserver/server.go index f24b1dd60..721fd216e 100644 --- a/core/dnsserver/server.go +++ b/core/dnsserver/server.go @@ -179,6 +179,13 @@ func (s *Server) Address() string { return s.Addr } // defined in the request so that the correct zone // (configuration and plugin stack) will handle the request. func (s *Server) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) { + // our dns library protects us against really invalid packets, we can still + // get semi valid packets. Drop them here. + if r == nil || len(r.Question) == 0 { + DefaultErrorFunc(w, r, dns.RcodeServerFailure) + return + } + if !s.debug { defer func() { // In case the user doesn't enable error plugin, we still |