diff --git a/interfaces/innerkits/fs_manager/fstab.c b/interfaces/innerkits/fs_manager/fstab.c
index d3befdeb433edeb2ae63e382c8862f5cb07674f7..a4463ed29ff51f3f4ecdc7878326bd234f5c7a74 100755
--- a/interfaces/innerkits/fs_manager/fstab.c
+++ b/interfaces/innerkits/fs_manager/fstab.c
@@ -298,13 +298,13 @@ char *GetFstabFile(void)
             return NULL;
         }
     } else {
-        char hardware[MAX_CMDLINE_VALUE_LEN] = {0};
+        char hardware[MAX_BUFFER_LEN] = {0};
         char *buffer = ReadFileData("/proc/cmdline");
         if (buffer == NULL) {
             FSMGR_LOGE("Failed read \"/proc/cmdline\"");
             return NULL;
         }
-        int ret = GetProcCmdlineValue("hardware", buffer, hardware, MAX_CMDLINE_VALUE_LEN);
+        int ret = GetProcCmdlineValue("hardware", buffer, hardware, MAX_BUFFER_LEN);
         free(buffer);
         if (ret != 0) {
             FSMGR_LOGE("Failed get hardware from cmdline");
diff --git a/services/include/init_utils.h b/services/include/init_utils.h
index 586c01411b932ef86028eb606758c58078df78a7..115ece873c1d63e0afeda7d38b4c4357e9af5395 100755
--- a/services/include/init_utils.h
+++ b/services/include/init_utils.h
@@ -29,7 +29,7 @@ extern "C" {
 #define OCTAL_BASE 8
 #define DECIMAL_BASE 10
 #define WAIT_MAX_COUNT 10
-#define MAX_CMDLINE_VALUE_LEN 96
+#define MAX_BUFFER_LEN 256
 #define ARRAY_LENGTH(array) (sizeof((array)) / sizeof((array)[0]))
 uid_t DecodeUid(const char *name);
 char *ReadFileToBuf(const char *configFile);