diff --git a/kernel/tkernel/killblock/kill_block.c b/kernel/tkernel/killblock/kill_block.c
index 50e8484bd51d3af5426ad422aa7fa80886c9f95c..9d4a95eea56df8de8f854b473fe8969e1054914a 100644
--- a/kernel/tkernel/killblock/kill_block.c
+++ b/kernel/tkernel/killblock/kill_block.c
@@ -91,15 +91,9 @@ static ssize_t whitelist_write(struct file *file, const char __user *ubuf,
 		if (!rule)
 			return -ENOMEM;
 
-		cnt = min_t(size_t, TASK_COMM_LEN - 1, strlen(token[1]));
-		strncpy(rule->src_comm, token[1], cnt);
-		rule->src_comm[cnt] = '\0';
-		cnt = min_t(size_t, TASK_COMM_LEN - 1, strlen(token[2]));
-		strncpy(rule->dst_comm, token[2], cnt);
-		rule->dst_comm[cnt] = '\0';
-		cnt = min_t(size_t, KILL_BLOCK_CGRP_LEN - 1, strlen(token[3]));
-		strncpy(rule->dst_cgrp, token[3], cnt);
-		rule->dst_cgrp[cnt] = '\0';
+		strscpy(rule->src_comm, token[1], sizeof(rule->src_comm));
+		strscpy(rule->dst_comm, token[2], sizeof(rule->dst_comm));
+		strscpy(rule->dst_cgrp, token[3], sizeof(rule->dst_cgrp));
 		write_lock(&whitelist_lock);
 		list_for_each_entry(tmp, &whitelist_list, node) {
 			if (!strcasecmp(tmp->src_comm, rule->src_comm) &&
@@ -213,7 +207,7 @@ static unsigned int kill_block_get_podid_len(char *podid_start)
 	return podid_len;
 }
 
-bool kill_block_whitelist_match(struct task_struct *p, int sig,
+static bool kill_block_whitelist_match(struct task_struct *p, int sig,
 			       char *src_cgrp_path, char *src_cgrp_name,
 			       char *dst_cgrp_path, char *dst_cgrp_name)
 {
diff --git a/kernel/tkernel/killprotect/kill_protect.c b/kernel/tkernel/killprotect/kill_protect.c
index 4474cad05b140197c9946ebb83267f625af47780..386014342cb04bb1d9c8772a0c6ee8ce1d60750c 100644
--- a/kernel/tkernel/killprotect/kill_protect.c
+++ b/kernel/tkernel/killprotect/kill_protect.c
@@ -87,9 +87,7 @@ static ssize_t blacklist_write(struct file *file, const char __user *ubuf,
 		if (!rule)
 			return -ENOMEM;
 
-		cnt = min_t(size_t, TASK_COMM_LEN - 1, strlen(token[1]));
-		strncpy(rule->comm, token[1], cnt);
-		rule->comm[cnt] = '\0';
+		strscpy(rule->comm, token[1], sizeof(rule->comm));
 
 		write_lock(&blacklist_lock);
 		list_for_each_entry(tmp, &blacklist_list, node) {
@@ -103,9 +101,7 @@ static ssize_t blacklist_write(struct file *file, const char __user *ubuf,
 		write_unlock(&blacklist_lock);
 		atomic_inc(&kp_rule_cnt);
 	} else if (strcmp(token[0], "del") == 0) {
-		cnt = min_t(size_t, TASK_COMM_LEN - 1, strlen(token[1]));
-		strncpy(comm, token[1], cnt);
-		comm[cnt] = '\0';
+		strscpy(comm, token[1], sizeof(comm));
 
 		write_lock(&blacklist_lock);
 		list_for_each_entry_safe(rule, tmp, &blacklist_list, node) {
@@ -183,7 +179,7 @@ static int stat_proc_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-bool kill_protect_blacklist_match(struct task_struct *p, int sig)
+static bool kill_protect_blacklist_match(struct task_struct *p, int sig)
 {
 	struct kp_blacklist_rule *rule;
 	bool curr_match = false;