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/sb.c b/qtfs/qtfs/sb.c
index faafa76fc9ce7a76d4c12977bcae98de7d2682a7..f7fdfe89ec8d36e35b14526c14b9f4ecaa373355 100644
--- a/qtfs/qtfs/sb.c
+++ b/qtfs/qtfs/sb.c
@@ -1571,7 +1571,7 @@ 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 +1596,12 @@ 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/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/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;
 	}