diff --git a/sys/netsmb/smb_dev.h b/sys/netsmb/smb_dev.h
index 8eb41f30303c..67149e1b6cec 100644
--- a/sys/netsmb/smb_dev.h
+++ b/sys/netsmb/smb_dev.h
@@ -58,9 +58,9 @@
 
 struct smbioc_ossn {
 	int		ioc_opt;
-	int		ioc_svlen;	/* size of ioc_server address */
+	uint32_t	ioc_svlen;	/* size of ioc_server address */
 	struct sockaddr*ioc_server;
-	int		ioc_lolen;	/* size of ioc_local address */
+	uint32_t	ioc_lolen;	/* size of ioc_local address */
 	struct sockaddr*ioc_local;
 	char		ioc_srvname[SMB_MAXSRVNAMELEN + 1];
 	int		ioc_timeout;
diff --git a/sys/netsmb/smb_subr.c b/sys/netsmb/smb_subr.c
index 39d3b49e09a4..ade9e17dcb7b 100644
--- a/sys/netsmb/smb_subr.c
+++ b/sys/netsmb/smb_subr.c
@@ -93,7 +93,7 @@ char *
 smb_strdup(const char *s)
 {
 	char *p;
-	int len;
+	size_t len;
 
 	len = s ? strlen(s) + 1 : 1;
 	p = malloc(len, M_SMBSTR, M_WAITOK);
@@ -108,11 +108,13 @@ smb_strdup(const char *s)
  * duplicate string from a user space.
  */
 char *
-smb_strdupin(char *s, int maxlen)
+smb_strdupin(char *s, size_t maxlen)
 {
 	char *p, bt;
-	int error, len = 0;
+	int error;
+	size_t len;
 
+	len = 0;
 	for (p = s; ;p++) {
 		if (copyin(p, &bt, 1))
 			return NULL;
@@ -135,7 +137,7 @@ smb_strdupin(char *s, int maxlen)
  * duplicate memory block from a user space.
  */
 void *
-smb_memdupin(void *umem, int len)
+smb_memdupin(void *umem, size_t len)
 {
 	char *p;
 
@@ -178,7 +180,7 @@ smb_memfree(void *s)
 }
 
 void *
-smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
+smb_zmalloc(size_t size, struct malloc_type *type, int flags)
 {
 
 	return malloc(size, type, flags | M_ZERO);
@@ -197,12 +199,12 @@ smb_strtouni(u_int16_t *dst, const char *src)
 void
 m_dumpm(struct mbuf *m) {
 	char *p;
-	int len;
+	size_t len;
 	printf("d=");
 	while(m) {
 		p=mtod(m,char *);
 		len=m->m_len;
-		printf("(%d)",len);
+		printf("(%zu)",len);
 		while(len--){
 			printf("%02x ",((int)*(p++)) & 0xff);
 		}
@@ -337,7 +339,7 @@ smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
 
 int
 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
-	int size, int caseopt)
+	size_t size, int caseopt)
 {
 	struct iconv_drv *dp = vcp->vc_toserver;
 
diff --git a/sys/netsmb/smb_subr.h b/sys/netsmb/smb_subr.h
index 12730ccaee06..76d4c0696d84 100644
--- a/sys/netsmb/smb_subr.h
+++ b/sys/netsmb/smb_subr.h
@@ -101,19 +101,19 @@ void smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred
 int  smb_td_intr(struct thread *);
 char *smb_strdup(const char *s);
 void *smb_memdup(const void *umem, int len);
-char *smb_strdupin(char *s, int maxlen);
-void *smb_memdupin(void *umem, int len);
+char *smb_strdupin(char *s, size_t maxlen);
+void *smb_memdupin(void *umem, size_t len);
 void smb_strtouni(u_int16_t *dst, const char *src);
 void smb_strfree(char *s);
 void smb_memfree(void *s);
-void *smb_zmalloc(unsigned long size, struct malloc_type *type, int flags);
+void *smb_zmalloc(size_t size, struct malloc_type *type, int flags);
 
 int  smb_calcmackey(struct smb_vc *vcp);
 int  smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN);
 int  smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN);
 int  smb_maperror(int eclass, int eno);
 int  smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp,
-	const char *src, int len, int caseopt);
+	const char *src, size_t len, int caseopt);
 int  smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp,
 	const char *src, int caseopt);
 int  smb_put_string(struct smb_rq *rqp, const char *src);