diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 13844261cd5f..ed776149261e 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -169,7 +169,7 @@ static inline int tty_copy_to_user(struct tty_struct *tty,
 {
 	struct n_tty_data *ldata = tty->disc_data;
 
-	tty_audit_add_data(tty, to, n, ldata->icanon);
+	tty_audit_add_data(tty, from, n, ldata->icanon);
 	return copy_to_user(to, from, n);
 }
 
diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index 90ca082935f6..3d245cd3d8e6 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -265,7 +265,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
  *
  *	Audit @data of @size from @tty, if necessary.
  */
-void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
+void tty_audit_add_data(struct tty_struct *tty, const void *data,
 			size_t size, unsigned icanon)
 {
 	struct tty_audit_buf *buf;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 5b04b0a5375b..5e31f1b99037 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -607,7 +607,7 @@ extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
 
 /* tty_audit.c */
 #ifdef CONFIG_AUDIT
-extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
+extern void tty_audit_add_data(struct tty_struct *tty, const void *data,
 			       size_t size, unsigned icanon);
 extern void tty_audit_exit(void);
 extern void tty_audit_fork(struct signal_struct *sig);
@@ -615,8 +615,8 @@ extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
 extern void tty_audit_push(struct tty_struct *tty);
 extern int tty_audit_push_current(void);
 #else
-static inline void tty_audit_add_data(struct tty_struct *tty,
-		unsigned char *data, size_t size, unsigned icanon)
+static inline void tty_audit_add_data(struct tty_struct *tty, const void *data,
+				      size_t size, unsigned icanon)
 {
 }
 static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)