From 72022049165472c09fa7b65fa04978ade29e4f47 Mon Sep 17 00:00:00 2001
From: Gustavo Almeida <gustavo.abcdef@hotmail.com>
Date: Fri, 19 Sep 2025 13:16:02 +0100
Subject: [PATCH] fix: add some log and protection on nua_client_request_unref

---
 libsofia-sip-ua/nua/nua_client.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libsofia-sip-ua/nua/nua_client.c b/libsofia-sip-ua/nua/nua_client.c
index 37ea07d29..167de5cb2 100644
--- a/libsofia-sip-ua/nua/nua_client.c
+++ b/libsofia-sip-ua/nua/nua_client.c
@@ -251,6 +251,17 @@ nua_client_request_t *nua_client_request_ref(nua_client_request_t *cr)
 
 int nua_client_request_unref(nua_client_request_t *cr)
 {
+
+  if(!cr)
+    return -1;
+
+  #if MEMCHECK != 0
+    if (cr->cr_refs == UINT32_C(0xAAAAAAAA)) {
+        SU_DEBUG_0(("Warning! double unref detected for cr=%p\n", cr));
+        return -1;
+    }
+  #endif
+
   if (cr->cr_refs > 1) {
     cr->cr_refs--;
     return 0;