From d1b85bc49c5dd0e2c2eaf06027b5520152317f62 Mon Sep 17 00:00:00 2001
From: Stefan Eissing <stefan@eissing.org>
Date: Mon, 1 Dec 2025 14:05:39 +0100
Subject: [PATCH] memdebug: log before free

add the debug log before freeing the memory, otherwise another thread
might allocate and log it before the free is logged.

Follow-up to a7bebd8502914f1652f423
Closes #19787
---
 lib/memdebug.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/memdebug.c b/lib/memdebug.c
index 1dda6d785c..b6c2d854c3 100644
--- a/lib/memdebug.c
+++ b/lib/memdebug.c
@@ -337,6 +337,9 @@ void curl_dbg_free(void *ptr, int line, const char *source)
   if(ptr) {
     struct memdebug *mem;
 
+  if(source)
+    curl_dbg_log("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
+
 #ifdef __INTEL_COMPILER
 #  pragma warning(push)
 #  pragma warning(disable:1684)
@@ -352,9 +355,6 @@ void curl_dbg_free(void *ptr, int line, const char *source)
     /* free for real */
     (Curl_cfree)(mem);
   }
-
-  if(source && ptr)
-    curl_dbg_log("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
 }
 
 curl_socket_t curl_dbg_socket(int domain, int type, int protocol,
-- 
2.47.3