From f8b88c417cf04c2609d484e7d1d81e6357acab9f Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Mon, 30 Dec 2024 17:13:49 +0100
Subject: [PATCH] dnsdist: Don't dereference a null pointer when accessing
 DoH{,3} headers via the FFI interface

---
 pdns/dnsdistdist/dnsdist-lua-ffi.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pdns/dnsdistdist/dnsdist-lua-ffi.cc b/pdns/dnsdistdist/dnsdist-lua-ffi.cc
index 79ee928428..9ed635a522 100644
--- a/pdns/dnsdistdist/dnsdist-lua-ffi.cc
+++ b/pdns/dnsdistdist/dnsdist-lua-ffi.cc
@@ -452,6 +452,10 @@ size_t dnsdist_ffi_dnsquestion_get_http_headers(dnsdist_ffi_dnsquestion_t* dq, c
   }
 #endif /* HAVE_DNS_OVER_HTTP3 */
 
+  if (!dq->httpHeadersVect) {
+    return 0;
+  }
+
   if (!dq->httpHeadersVect->empty()) {
     *out = dq->httpHeadersVect->data();
   }
-- 
2.47.2