diff --git a/qtfs/ipc/uds_main.c b/qtfs/ipc/uds_main.c
index cea0b1a2bed8e14e781fe95407dcc11545c21f95..d559d016721e3d8beb182089423862abf0eef2ba 100644
--- a/qtfs/ipc/uds_main.c
+++ b/qtfs/ipc/uds_main.c
@@ -190,7 +190,7 @@ void uds_main_loop(int efd, struct uds_thread_arg *arg)
 		uds_event_pre_hook(p_event_var);
 		for (int i = 0; i < n; i++) {
 			udsevt = (struct uds_event *)evts[i].data.ptr;
-			uds_log("event fd:%d events:%d tofree:%d", udsevt->fd, evts[i].events, udsevt->tofree);
+			uds_log("event fd:%d events:%d tofree:%u", udsevt->fd, evts[i].events, udsevt->tofree);
 			if (udsevt->handler == NULL) {
 				uds_err("bad event, fd:%d handler is NULL.", udsevt->fd);
 				continue;
@@ -414,7 +414,6 @@ void uds_del_event(struct uds_event *evt)
 	}
 	uds_event_delete(p_uds_var->efd[hash], evt->fd);
 	free(evt);
-	evt = NULL;
 	return;
 }
 
diff --git a/qtfs/qtfs/qtfs-mod.c b/qtfs/qtfs/qtfs-mod.c
index e4fb9044f1d60acadd46501bb12e00655bf06f2c..e2648cd24880c14a0a5e66c55a8bcf2e1a2ef2c1 100644
--- a/qtfs/qtfs/qtfs-mod.c
+++ b/qtfs/qtfs/qtfs-mod.c
@@ -221,6 +221,7 @@ static int __init qtfs_init(void)
 		ret = -ENOMEM;
 		goto cache_create_err;
 	}
+	qtfs_whitelist_initset();
 	qtfs_conn_param_init();
 	g_qtfs_epoll_thread = kthread_run(qtfs_epoll_thread, NULL, "qtfs_epoll");
 	if (IS_ERR_OR_NULL(g_qtfs_epoll_thread)) {
@@ -288,7 +289,7 @@ static void __exit qtfs_exit(void)
 		kfree(qtfs_epoll_var);
 		qtfs_epoll_var = NULL;
 	}
-	qtfs_whitelist_initset();
+	qtfs_whitelist_exit();
 
 	kfree(qtfs_diag_info);
 	qtfs_diag_info = NULL;
diff --git a/qtfs/qtfs/qtfs-mod.h b/qtfs/qtfs/qtfs-mod.h
index bf38babbb6eebae5856e0deb6e8d5714bd413fe3..3939e0facdada958be458db3e456d180a853fd58 100644
--- a/qtfs/qtfs/qtfs-mod.h
+++ b/qtfs/qtfs/qtfs-mod.h
@@ -184,6 +184,7 @@ struct dentry *qtfs_fs_mount(struct file_system_type *fs_type,
 void *qtfs_remote_run(struct qtfs_conn_var_s *pvar, unsigned int type, unsigned int len);
 int qtfs_misc_register(void);
 void qtfs_misc_destroy(void);
+void qtfs_whitelist_exit(void);
 long qtfs_misc_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 int qtfs_missmsg_proc(struct qtfs_conn_var_s *pvar);
 int qtfs_utils_register(void);
diff --git a/qtfs/qtfs/sb.c b/qtfs/qtfs/sb.c
index faafa76fc9ce7a76d4c12977bcae98de7d2682a7..d1aa3db3c99f7e2341b60fcc4134214b14a6dac7 100644
--- a/qtfs/qtfs/sb.c
+++ b/qtfs/qtfs/sb.c
@@ -71,6 +71,7 @@ static void qtfs_free_inode(struct inode *inode)
 		kmem_cache_free(qtfs_inode_priv_cache, inode->i_private);
 		inode->i_private = NULL;
 	}
+	free_inode_nonrcu(inode);
 	return;
 }
 
@@ -1571,7 +1572,7 @@ int qtfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 	struct qtfs_conn_var_s *pvar = NULL;
 	struct qtreq_getattr *req;
 	struct qtrsp_getattr *rsp;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = NULL;
 	if (dentry && dentry->d_inode) {
 		if (jiffies_to_msecs(jiffies - dentry->d_time) < 2000)
 			return 1;
@@ -1596,7 +1597,12 @@ int qtfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 			return 0;
 		}
 
-		if (!inode || inode->i_ino != rsp->stat.ino || inode->i_mode != rsp->stat.mode) {
+		inode = dentry->d_inode;
+		if (inode == NULL) {
+			qtfs_conn_put_param(pvar);
+			return 0;
+		}
+		if (inode->i_ino != rsp->stat.ino || inode->i_mode != rsp->stat.mode) {
 			if (inode->i_nlink > 0)
 				drop_nlink(inode);
 			qtfs_conn_put_param(pvar);
diff --git a/qtfs/qtfs_common/conn.c b/qtfs/qtfs_common/conn.c
index cc59d5256e58ebfe845412ec985901778ba68c9f..5a4fcdf2f3b3c1b4f5d711cee35ddc40e3a5582f 100644
--- a/qtfs/qtfs_common/conn.c
+++ b/qtfs/qtfs_common/conn.c
@@ -696,7 +696,7 @@ struct qtfs_conn_var_s *qtfs_epoll_establish_conn(void)
 			ret = qtfs_sm_active(pvar);
 		}
 		if (ret) {
-			return NULL;
+			qtfs_err("qtfs_sm_active or qtfs_sm_reconnect failed with error code: %d", ret);
 		}
 		return pvar;
 	}
@@ -707,7 +707,6 @@ struct qtfs_conn_var_s *qtfs_epoll_establish_conn(void)
 		return NULL;
 	}
 	memset(pvar, 0, sizeof(struct qtfs_conn_var_s));
-	qtfs_epoll_var = pvar;
 	pvar->recv_max = QTFS_EPOLL_MSG_LEN;
 	pvar->send_max = QTFS_EPOLL_MSG_LEN;
 	pvar->user_type = QTFS_CONN_TYPE_EPOLL;
@@ -718,12 +717,12 @@ struct qtfs_conn_var_s *qtfs_epoll_establish_conn(void)
 		kfree(pvar);
 		return NULL;
 	}
+	qtfs_epoll_var = pvar;
 	pvar->state = QTCONN_INIT;
 
 	ret = qtfs_sm_active(pvar);
 	if (ret) {
 		qtfs_err("qtfs epoll get param active new param failed, ret:%d state:%s", ret, QTCONN_CUR_STATE(pvar));
-		return NULL;
 	}
 
 	qtfs_info("qtfs create new epoll param state:%s", QTCONN_CUR_STATE(pvar));
diff --git a/qtfs/qtfs_common/misc.c b/qtfs/qtfs_common/misc.c
index beff5cb06e0d4eb58a0077316c909f59e7b99124..6f84b9506c4ceb48fa921c636aaf54e9a9ef27e9 100644
--- a/qtfs/qtfs_common/misc.c
+++ b/qtfs/qtfs_common/misc.c
@@ -257,6 +257,12 @@ void qtfs_whitelist_clearall(void)
 	return;
 }
 
+void qtfs_whitelist_exit(void)
+{
+	qtfs_whitelist_clearall();
+	return;
+}
+
 long qtfs_misc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret = QTOK;
diff --git a/qtfs/qtfs_common/user_engine.c b/qtfs/qtfs_common/user_engine.c
index 31947b26457cf57d8aa76c14c7e8ab01d9471536..3337c341adc39a121ee33ef69991444e59265791 100644
--- a/qtfs/qtfs_common/user_engine.c
+++ b/qtfs/qtfs_common/user_engine.c
@@ -183,7 +183,7 @@ static void *qtfs_engine_kthread(void *arg)
 				continue;
 			}
 			ret = ioctl(qtfs_fd, QTFS_IOCTL_EXIT, 0);
-			engine_out("qtfs engine send QTFS_IOCTL_EXIT to kernel, get return value:%d.", ret);
+			engine_out("qtfs engine send QTFS_IOCTL_EXIT to kernel, get return value:%ld.", ret);
 			engine_run = 0;
 			break;
 		}
@@ -229,7 +229,7 @@ static void *qtfs_engine_epoll_thread(void *data)
 		}
 	}
 end:
-	engine_out("qtfs server epoll thread exit, ret:%d.", ret);
+	engine_out("qtfs server epoll thread exit, ret:%ld.", ret);
 
 	return NULL;
 }
@@ -354,7 +354,7 @@ static int qtfs_engine_check_port(unsigned short port, char *scid)
 	}
 	int sockfd = socket(AF_INET, SOCK_STREAM, 0);
 	if (sockfd < 0) {
-		engine_err("socket error, fd:%", sockfd);
+		engine_err("socket error, fd:%d", sockfd);
 		return -1;
 	}
 	bzero(&sin, sizeof(sin));
@@ -389,7 +389,7 @@ static int qtfs_engine_check_port(unsigned short port, char *scid)
 	
 	int sock_fd = socket(saddr.svm_family, SOCK_STREAM, 0);
 	if (bind(sock_fd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) {
-		engine_err("cid:%u port:%u bind failed, errno:%d.", cid, port, errno);
+		engine_err("cid:%ld port:%u bind failed, errno:%d.", cid, port, errno);
 		close(sock_fd);
 		return -1;
 	}
diff --git a/qtfs/qtfs_server/qtfs-server.c b/qtfs/qtfs_server/qtfs-server.c
index e6915747fbd796fb4911dcdeb8ff967367e47e3c..12d2ed0952b478e4eeea81f03640e8b44a1de053 100644
--- a/qtfs/qtfs_server/qtfs-server.c
+++ b/qtfs/qtfs_server/qtfs-server.c
@@ -46,6 +46,19 @@ struct qtfs_server_epoll_s qtfs_epoll = {
 };
 rwlock_t qtfs_epoll_rwlock;
 
+void qtfs_server_epoll_exit(void)
+{
+	write_lock(&qtfs_epoll_rwlock);
+	if (qtfs_epoll.kevents == NULL) {
+		write_unlock(&qtfs_epoll_rwlock);
+		return;
+	}
+	kfree(qtfs_epoll.kevents);
+	qtfs_epoll.kevents = NULL;
+	write_unlock(&qtfs_epoll_rwlock);
+	return;
+}
+
 long qtfs_server_epoll_thread(struct qtfs_conn_var_s *pvar)
 {
 	int n;
@@ -412,6 +425,8 @@ static void __exit qtfs_server_exit(void)
 		qtfs_fd_bitmap.nbits = 0;
 	}
 	write_unlock(&g_userp_rwlock);
+	qtfs_whitelist_exit();
+	qtfs_server_epoll_exit();
 
 	qtfs_misc_destroy();
 	qtfs_syscall_replace_stop();
diff --git a/qtfs/qtfs_server/qtfs-server.h b/qtfs/qtfs_server/qtfs-server.h
index bfab00a96bfd5f47b6c3638780d329721ea34643..8135dbbf53b2712819a7ec881ef2606f5c65ee60 100644
--- a/qtfs/qtfs_server/qtfs-server.h
+++ b/qtfs/qtfs_server/qtfs-server.h
@@ -43,6 +43,7 @@ int qtfs_conn_server_run(struct qtfs_conn_var_s *pvar);
 long qtfs_misc_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 int qtfs_misc_register(void);
 void qtfs_misc_destroy(void);
+void qtfs_whitelist_exit(void);
 long qtfs_misc_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 void qtfs_whitelist_clearall(void);
 void qtfs_whitelist_initset(void);
diff --git a/qtfs/qtinfo/qtinfo.c b/qtfs/qtinfo/qtinfo.c
index 93dbd6b1c1fcf51e0bc1229bef28223eee54f5d4..4c915aee5e51b66186d47aacc68ddc06036ece21 100644
--- a/qtfs/qtinfo/qtinfo.c
+++ b/qtfs/qtinfo/qtinfo.c
@@ -511,7 +511,7 @@ static void qtinfo_opt_z_bytype(int fd, unsigned int type)
 		ret = ioctl(fd, QTFS_IOCTL_WL_GET, &head);
 		if (ret != QTOK)
 			break;
-		qtinfo_out("  [index:%d][path:%s]", index, head.path);
+		qtinfo_out("  [index:%u][path:%s]", index, head.path);
 	}
 	return;
 }
diff --git a/qtfs/rexec/rexec.c b/qtfs/rexec/rexec.c
index a214a74b55d10d74ad521fc16e260bb0588537b9..060abc54009139be6a44cd2a4d2533a8c0aadc6e 100644
--- a/qtfs/rexec/rexec.c
+++ b/qtfs/rexec/rexec.c
@@ -577,14 +577,14 @@ static int rexec_handshake_init(int efd, int connfd)
 {
 	char *hs_read = getenv("REXEC_HANDSHAKE_RD");
 	if (hs_read == NULL) {
-		rexec_log("handshake not in effect, read:%lx", hs_read);
+		rexec_log("handshake not in effect.");
 		return 0;
 	}
 	g_rexec.rexec_hs_fd[PIPE_READ] = atoi(hs_read);
 
 	char *hs_write = getenv("REXEC_HANDSHAKE_WR");
 	if (hs_write == NULL) {
-		rexec_log("handshake not in effect, wirte:%lx", hs_write);
+		rexec_log("handshake not in effect, read:%s", hs_read);
 		g_rexec.rexec_hs_fd[PIPE_READ] = -1;
 		return 0;
 	}