Patch-Source: https://src.fedoraproject.org/rpms/dnsmasq/blob/f36/f/0011-Fix-coverity-detected-issue-in-radv.c.patch (backport from upstream)
--
From 9c088b29dcdb8a3e013120d8272a6e0314a8f3df 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 19:29:23 +0200
Subject: [PATCH 11/15] Fix coverity detected issue in radv.c

diff --git a/src/radv.c b/src/radv.c
index 3255904..6d6fa32 100644
--- a/src/radv.c
+++ b/src/radv.c
@@ -746,6 +746,8 @@ static int add_lla(int index, unsigned int type, char *mac, size_t maclen, void
 	 add 7 to round up */
       int len = (maclen + 9) >> 3;
       unsigned char *p = expand(len << 3);
+      if (!p)
+	return 1;
       memset(p, 0, len << 3);
       *p++ = ICMP6_OPT_SOURCE_MAC;
       *p++ = len;
-- 
2.31.1