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path: root/drivers/char/vt.c
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Diffstat (limited to 'drivers/char/vt.c')
-rw-r--r--drivers/char/vt.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 75ff028..a8239da 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -152,7 +152,7 @@ static void gotoxy(struct vc_data *vc, int new_x, int new_y);
static void save_cur(struct vc_data *vc);
static void reset_terminal(struct vc_data *vc, int do_clear);
static void con_flush_chars(struct tty_struct *tty);
-static void set_vesa_blanking(char __user *p);
+static int set_vesa_blanking(char __user *p);
static void set_cursor(struct vc_data *vc);
static void hide_cursor(struct vc_data *vc);
static void console_callback(struct work_struct *ignored);
@@ -2369,7 +2369,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
ret = __put_user(data, p);
break;
case TIOCL_SETVESABLANK:
- set_vesa_blanking(p);
+ ret = set_vesa_blanking(p);
break;
case TIOCL_GETKMSGREDIRECT:
data = kmsg_redirect;
@@ -3313,11 +3313,15 @@ postcore_initcall(vtconsole_class_init);
* Screen blanking
*/
-static void set_vesa_blanking(char __user *p)
+static int set_vesa_blanking(char __user *p)
{
- unsigned int mode;
- get_user(mode, p + 1);
- vesa_blank_mode = (mode < 4) ? mode : 0;
+ unsigned int mode;
+
+ if (get_user(mode, p + 1))
+ return -EFAULT;
+
+ vesa_blank_mode = (mode < 4) ? mode : 0;
+ return 0;
}
void do_blank_screen(int entering_gfx)