From 598c3094045da95afd184b4dbb8577c396ef359c Mon Sep 17 00:00:00 2001
From: Caisking <Casiking@zhihuishixun.com>
Date: Fri, 26 Dec 2025 21:18:58 +0800
Subject: [PATCH] =?utf8?q?=E4=BC=98=E5=8C=96NMEA=E7=9A=84=E8=B6=8A?=
 =?utf8?q?=E7=95=8C=E9=A3=8E=E9=99=A9?=
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---
 code/sdk/zhihui/services/gnss/src/NMEA0183.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/code/sdk/zhihui/services/gnss/src/NMEA0183.c b/code/sdk/zhihui/services/gnss/src/NMEA0183.c
index 46bd78f2d..d45ad1309 100644
--- a/code/sdk/zhihui/services/gnss/src/NMEA0183.c
+++ b/code/sdk/zhihui/services/gnss/src/NMEA0183.c
@@ -144,6 +144,11 @@ static unsigned char nmea_term_complete(gps_nmea_t* pnmea, gps_data_t* pdata)
     // handle the last term in a message
     if (pnmea->is_checksum_term)
 	{
+        // 检查校验和字段长度，防止数组越界访问
+        if (pnmea->term_offset < 2) {
+            // 校验和字段长度不足，返回0表示解析失败
+            return 0;
+        }
         unsigned char checksum = 16 * from_hex(pnmea->term[0]) + from_hex(pnmea->term[1]);
         
         /* 检验信息段是否完整无错，如果校验通过，则将解析得到的数据保存，并提供给用户调用*/
-- 
2.17.1