Patch-Source: https://src.fedoraproject.org/rpms/dnsmasq/blob/f36/f/0009-Address-coverity-issues-detected-in-util.c.patch (backport from upstream)
--
From 7b975696a7bda5b86fcf168644f177544adb6fe9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Fri, 3 Sep 2021 17:38:26 +0200
Subject: [PATCH 09/15] Address coverity issues detected in util.c

diff --git a/src/util.c b/src/util.c
index 1425764..8e69d55 100644
--- a/src/util.c
+++ b/src/util.c
@@ -208,6 +208,8 @@ char *canonicalise(char *in, int *nomem)
   /* older libidn2 strips underscores, so don't do IDN processing
      if the name has an underscore (check_name() returned 2) */
   if (rc != 2)
+#else
+  (void)rc;
 #endif
 #if defined(HAVE_IDN) || defined(HAVE_LIBIDN2)
     {
@@ -235,11 +237,14 @@ char *canonicalise(char *in, int *nomem)
       return ret;
     }
 #endif
-  
+
+#if !defined(HAVE_LIBIDN2) || (defined(HAVE_LIBIDN2) && (!defined(IDN2_VERSION_NUMBER) || IDN2_VERSION_NUMBER < 0x02000003))
+  /* If recent libidn2 is used, it cannot reach this code. */
   if ((ret = whine_malloc(strlen(in)+1)))
     strcpy(ret, in);
   else if (nomem)
-    *nomem = 1;    
+    *nomem = 1;
+#endif
 
   return ret;
 }
@@ -528,7 +533,7 @@ void prettyprint_time(char *buf, unsigned int t)
       if ((x = (t/60)%60))
 	p += sprintf(&buf[p], "%um", x);
       if ((x = t%60))
-	p += sprintf(&buf[p], "%us", x);
+	sprintf(&buf[p], "%us", x);
     }
 }
 
@@ -574,7 +579,7 @@ int parse_hex(char *in, unsigned char *out, int maxlen,
 		  int j, bytes = (1 + (r - in))/2;
 		  for (j = 0; j < bytes; j++)
 		    { 
-		      char sav = sav;
+		      char sav;
 		      if (j < bytes - 1)
 			{
 			  sav = in[(j+1)*2];
-- 
2.31.1