diff --git a/fs/hmdfs/inode_local.c b/fs/hmdfs/inode_local.c
index ef36f5e33240ffd7a7a5d66741047ec56f4655be..69853b8c84d48a7a40bcdfb0a75a4b8b1e3e72e6 100644
--- a/fs/hmdfs/inode_local.c
+++ b/fs/hmdfs/inode_local.c
@@ -742,17 +742,18 @@ int hmdfs_rename_local(struct inode *old_dir, struct dentry *old_dentry,
 
 static bool symname_is_allowed(const char *symname)
 {
-	size_t symname_len = strlen(symname);
-	int i;
-
-	if (symname_len == 1)
-		return true;
-
-	for (i = 0; i < symname_len - 1; i++)
-		if (symname[i] == '.' && symname[i + 1] == '.') {
-			hmdfs_err("Prohibited link path");
-			return false;
-		}
+	char *p;
+	size_t symname_len;
+
+	symname_len = strnlen(symname, PATH_MAX);
+	if (symname_len >= PATH_MAX)
+		return false;
+
+	p = strstr(symname, "/../");
+	if (p)
+		return false;
+	if (symname[0] == '.' && symname[1] == '.' && symname[2] == '/')
+		return false;
 
 	return true;
 }