From 80acb76f461c77a0ec7f3fc9a7a0817724831dc3 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Sat, 24 Jan 2026 23:59:06 +0000
Subject: [PATCH] Don't start malloc() logging until the log system is
 configured.

---
 src/dnsmasq.c |  3 +++
 src/dnsmasq.h |  1 +
 src/util.c    | 15 +++++++++------
 3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/src/dnsmasq.c b/src/dnsmasq.c
index 31dd1e3..f6daae6 100644
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -864,6 +864,9 @@ int main (int argc, char **argv)
     }
 #endif
 
+   /* Don't start logging malloc before logging is set up. */
+  daemon->log_malloc = option_bool(OPT_LOG_MALLOC);
+  
   if (daemon->port == 0)
     my_syslog(LOG_INFO, _("started, version %s DNS disabled"), VERSION);
   else 
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index 80e9304..b9062e3 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1208,6 +1208,7 @@ extern struct daemon {
   int log_fac; /* log facility */
   char *log_file; /* optional log file */
   int max_logs;  /* queue limit */
+  int log_malloc; /* log malloc/realloc/free */
   int randport_limit; /* Maximum number of source ports for query. */
   int cachesize, ftabsize;
   int port, query_port, min_port, max_port;
diff --git a/src/util.c b/src/util.c
index 1f925e7..b5c961b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -938,7 +938,7 @@ void *whine_malloc_real(const char *func, unsigned int line, size_t size)
   
   if (!ret)
     my_syslog(LOG_ERR, _("failed to allocate %d bytes"), (int) size);
-  else if (option_bool(OPT_LOG_MALLOC))
+  else if (daemon->log_malloc)
     my_syslog(LOG_INFO, _("malloc: %s:%u %zu bytes at %x"), func, line, size, hash_ptr(ret));
 
   return ret;
@@ -951,17 +951,20 @@ void *whine_realloc_real(const char *func, unsigned int line, void *ptr, size_t
   
   if (!ret)
     my_syslog(LOG_ERR, _("failed to reallocate %d bytes"), (int) size);
-  else if (option_bool(OPT_LOG_MALLOC))
+  else if (daemon->log_malloc)
     my_syslog(LOG_INFO, _("realloc: %s:%u %zu bytes from %x to %x"), func, line, size, old, hash_ptr(ret));
   
   return ret;
 }
 
+#undef free
 void free_real(const char *func, unsigned int line, void *ptr)
 {
-  if (ptr && option_bool(OPT_LOG_MALLOC))
-    my_syslog(LOG_INFO, _("free: %s:%u block at %x"), func, line, hash_ptr(ptr));
+  if (ptr)
+    {
+      if (daemon->log_malloc)
+	my_syslog(LOG_INFO, _("free: %s:%u block at %x"), func, line, hash_ptr(ptr));
   
-#undef free
-  free(ptr);
+      free(ptr);
+    }
 }