!696 iSulad: initialization buf before readlink()

Merge pull request !696 from zhangxiaoyu/master

test/image/oci/registry/registry_ut.cc

@@ -56,7 +56,7 @@ using ::testing::Invoke;
 
 std::string get_dir()
 {
-    char abs_path[PATH_MAX];
+    char abs_path[PATH_MAX] { 0x00 };
     int ret = readlink("/proc/self/exe", abs_path, sizeof(abs_path));
     if (ret < 0 || (size_t)ret >= sizeof(abs_path)) {
         return "";

test/image/oci/storage/images/storage_images_ut.cc

@@ -47,7 +47,7 @@ using ::testing::_;
 
 std::string GetDirectory()
 {
-    char abs_path[PATH_MAX];
+    char abs_path[PATH_MAX] { 0x00 };
     int ret = readlink("/proc/self/exe", abs_path, sizeof(abs_path));
     if (ret < 0 || (size_t)ret >= sizeof(abs_path)) {
         return "";

test/image/oci/storage/layers/storage_driver_ut.cc

@@ -42,7 +42,7 @@ using ::testing::FLAGS_gmock_catch_leaked_mocks;
 
 std::string GetDirectory()
 {
-    char abs_path[PATH_MAX];
+    char abs_path[PATH_MAX] { 0x00 };
     int ret = readlink("/proc/self/exe", abs_path, sizeof(abs_path));
     if (ret < 0 || (size_t)ret >= sizeof(abs_path)) {
         return "";

test/image/oci/storage/layers/storage_layers_ut.cc

@@ -43,7 +43,7 @@ using ::testing::_;
 
 std::string GetDirectory()
 {
-    char abs_path[PATH_MAX];
+    char abs_path[PATH_MAX] { 0x00 };
     int ret = readlink("/proc/self/exe", abs_path, sizeof(abs_path));
     if (ret < 0 || (size_t)ret >= sizeof(abs_path)) {
         return "";

test/image/oci/storage/rootfs/storage_rootfs_ut.cc

@@ -35,7 +35,7 @@ std::string META_DATA_CONTENT = "metadata test";
 
 std::string GetDirectory()
 {
-    char abs_path[PATH_MAX];
+    char abs_path[PATH_MAX] { 0x00 };
     int ret = readlink("/proc/self/exe", abs_path, sizeof(abs_path));
     if (ret < 0 || (size_t)ret >= sizeof(abs_path)) {
         return "";