From b247c1a1939ca976366e5c050e7506d59408d1e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=86=B7=E9=92=A6=E8=A1=97?= <15390014138@163.com>
Date: Mon, 29 Mar 2021 11:57:42 +0800
Subject: [PATCH] update ability/sbuf/src/hdf_sbuf.c.

---
 ability/sbuf/src/hdf_sbuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ability/sbuf/src/hdf_sbuf.c b/ability/sbuf/src/hdf_sbuf.c
index 57b4944a3..60341b0da 100644
--- a/ability/sbuf/src/hdf_sbuf.c
+++ b/ability/sbuf/src/hdf_sbuf.c
@@ -414,7 +414,7 @@ struct HdfSBuf *HdfSBufCopy(const struct HdfSBuf *sbuf)
     new->capacity = sbuf->capacity;
     new->readPos = 0;
     new->writePos = sbuf->writePos;
-    if (memcpy_s(new->data, new->capacity, sbuf->data, sbuf->capacity) != EOK) {
+    if (memcpy_s(new->data, new->capacity, sbuf->data, sbuf->writePos) != EOK) {
         HdfSBufRecycle(new);
         return NULL;
     }
-- 
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