diff --git a/crypto/sm2/sm2_oct.c b/crypto/sm2/sm2_oct.c
old mode 100644
new mode 100755
index 6f951e77..f9ca4cfb
--- a/crypto/sm2/sm2_oct.c
+++ b/crypto/sm2/sm2_oct.c
@@ -274,7 +274,9 @@ SM2CiphertextValue *o2i_SM2CiphertextValue(const EC_GROUP *group,
 	ret = cv;
 
 end:
-	SM2CiphertextValue_free(cv);
+	if ((cv != *pout) && (!ret))
+		SM2CiphertextValue_free(cv);
+
 	EC_POINT_free(point);
 	BN_CTX_free(bn_ctx);
 	return ret;
diff --git a/crypto/sm3/sm3.c b/crypto/sm3/sm3.c
old mode 100644
new mode 100755
index 17994f94..fdbcab1f
--- a/crypto/sm3/sm3.c
+++ b/crypto/sm3/sm3.c
@@ -110,8 +110,8 @@ void sm3_final(sm3_ctx_t *ctx, unsigned char *digest)
 		memset(ctx->block, 0, SM3_BLOCK_SIZE - 8);
 	}
 
-	count[0] = cpu_to_be32((ctx->nblocks) >> 23);
-	count[1] = cpu_to_be32((ctx->nblocks << 9) + (ctx->num << 3));
+	count[0] = cpu_to_be32((uint32_t)(ctx->nblocks >> 23));
+	count[1] = cpu_to_be32((uint32_t)(ctx->nblocks << 9) + (ctx->num << 3));
 
 	sm3_compress(ctx->digest, ctx->block);
 	for (i = 0; i < sizeof(ctx->digest)/sizeof(ctx->digest[0]); i++) {
diff --git a/include/openssl/sm3.h b/include/openssl/sm3.h
old mode 100644
new mode 100755
index 29ce397b..96ef60f2
--- a/include/openssl/sm3.h
+++ b/include/openssl/sm3.h
@@ -70,7 +70,7 @@ extern "C" {
 
 typedef struct {
 	uint32_t digest[8];
-	int nblocks;
+	uint64_t nblocks;
 	unsigned char block[64];
 	int num;
 } sm3_ctx_t;