From f98ca529d4573591b4826866940f8fd29dac936e Mon Sep 17 00:00:00 2001
From: Sergey Fionov <sfionov@adguard.com>
Date: Sat, 27 Apr 2024 08:53:05 +0300
Subject: [PATCH] Add test for out-of-bound access in ip6addr_ntoa_r()

---
 test/unit/ip6/test_ip6.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/test/unit/ip6/test_ip6.c b/test/unit/ip6/test_ip6.c
index a030ee5a0..abd879106 100644
--- a/test/unit/ip6/test_ip6.c
+++ b/test/unit/ip6/test_ip6.c
@@ -268,15 +268,18 @@ END_TEST
 
 struct test_addr_and_str {
   ip_addr_t addr;
+  u32_t bytes_after;
   const char *str;
 };
 
 START_TEST(test_ip6_ntoa)
 {
   struct test_addr_and_str tests[] = {
-    {IPADDR6_INIT_HOST(0xfe800000, 0x00000000, 0xb2a1a2ff, 0xfea3a4a5), "FE80::B2A1:A2FF:FEA3:A4A5"}, /* test shortened zeros */
-    {IPADDR6_INIT_HOST(0xfe800000, 0xff000000, 0xb2a1a2ff, 0xfea3a4a5), "FE80:0:FF00:0:B2A1:A2FF:FEA3:A4A5"}, /* don't omit single zero blocks */
-    {IPADDR6_INIT_HOST(0xfe800000, 0xff000000, 0xb2000000, 0x0000a4a5), "FE80:0:FF00:0:B200::A4A5"}, /* omit longest zero block */
+    {IPADDR6_INIT_HOST(0xfe800000, 0x00000000, 0xb2a1a2ff, 0xfea3a4a5), 0, "FE80::B2A1:A2FF:FEA3:A4A5"}, /* test shortened zeros */
+    {IPADDR6_INIT_HOST(0xfe800000, 0xff000000, 0xb2a1a2ff, 0xfea3a4a5), 0, "FE80:0:FF00:0:B2A1:A2FF:FEA3:A4A5"}, /* don't omit single zero blocks */
+    {IPADDR6_INIT_HOST(0xfe800000, 0xff000000, 0xb2000000, 0x0000a4a5), 0, "FE80:0:FF00:0:B200::A4A5"}, /* omit longest zero block */
+    {IPADDR6_INIT_HOST(0x20010db8, 0x00010002, 0x00030004, 0x00050000), 0, "2001:DB8:1:2:3:4:5:0"}, /* do not omit last zero due to out-of-bounds bug */
+    {IPADDR6_INIT_HOST(0x20010db8, 0x00010002, 0x00030004, 0x00050000), ~0, "2001:DB8:1:2:3:4:5:0"}, /* do not omit last zero due to out-of-bounds bug */
   };
   char buf[128];
   char *str;