From 99400e4659fbd84adecdf621f213e0f7f329556c Mon Sep 17 00:00:00 2001
From: yinbin <yinbin8@huawei.com>
Date: Mon, 14 Oct 2024 09:19:26 +0800
Subject: [PATCH 2/3] IPV6: fix array out of bounds in function ip6_ntoa_r

---
 src/core/ipv6/ip6_addr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/ipv6/ip6_addr.c b/src/core/ipv6/ip6_addr.c
index 6e0ac86..dfcc5b1 100644
--- a/src/core/ipv6/ip6_addr.c
+++ b/src/core/ipv6/ip6_addr.c
@@ -278,7 +278,7 @@ ip6addr_ntoa_r(const ip6_addr_t *addr, char *buf, int buflen)
         }
         break;
       }
-      if (empty_block_flag == 0) {
+      if (empty_block_flag == 0 && current_block_value < 7) {
         /* generate empty block "::", but only if more than one contiguous zero block,
          * according to current formatting suggestions RFC 5952. */
         next_block_value = lwip_htonl(addr->addr[(current_block_index + 1) >> 1]);
-- 
2.34.1

