From 430c92c88f480bd3ca0c01c655d8cffdfce10f6b Mon Sep 17 00:00:00 2001
From: yuqing <qing.yu@yundongpai.net>
Date: Thu, 16 Aug 2018 18:24:30 +0800
Subject: [PATCH] correct vsnprintf for log_plus

---
 src/sf_util.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sf_util.c b/src/sf_util.c
index 73c0072..b726f1c 100644
--- a/src/sf_util.c
+++ b/src/sf_util.c
@@ -52,6 +52,9 @@ void log_plus(const int priority, const char* file,
     va_start(ap, fmt);
     hlen += vsnprintf(buf+hlen, sizeof(buf)-hlen, fmt, ap);
     va_end(ap);
+    if (hlen >= sizeof(buf)) {
+        hlen = sizeof(buf) - 1;
+    }
     log_it_ex1(&g_log_context, priority, buf, hlen);
 }