diff --git a/.gitignore b/.gitignore
index 211686a..d9ee186 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.cmake
+linux_kernel/.main.o.d
diff --git a/linux_kernel/main.c b/linux_kernel/main.c
index e627626..a234bc0 100644
--- a/linux_kernel/main.c
+++ b/linux_kernel/main.c
@@ -110,8 +110,10 @@ int cleanup(void) {
     }
     destory_dev();
     cleanup_msg();
+
     return -1;
 }
+
 static int __init driver_entry(void) {
     printk(KERN_WARNING "[DebugMessage] safe duck init\n");
 
diff --git a/linux_kernel/network.c b/linux_kernel/network.c
index 23f6480..3cd2c60 100644
--- a/linux_kernel/network.c
+++ b/linux_kernel/network.c
@@ -20,7 +20,6 @@ void block_ip_address(size_t ip_address, size_t time_sec) {
 bool check_is_blacklist_ip(size_t ip_address) {
     struct ip_hashmap_node_t *data = get_ipdata_by_hashmap(ip_address);
     if (data == NULL) {
-        printk(KERN_ERR "Failed to get ip data from hashmap\n");
         return false;
     }
     return data->info.ip_meta_info.is_attack;