Input: keyboard - fix theoretical race on vt switch
A VT switch can theoretically change fg_console between
vc = vc_cons[fg_console].d
and
kbd = kbd_table + fg_console
Fix it by replacing the second fg_console with vc->vc_num.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
index 737be95..747683f 100644
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -1136,7 +1136,7 @@
static void kbd_rawcode(unsigned char data)
{
struct vc_data *vc = vc_cons[fg_console].d;
- kbd = kbd_table + fg_console;
+ kbd = kbd_table + vc->vc_num;
if (kbd->kbdmode == VC_RAW)
put_queue(vc, data);
}
@@ -1157,7 +1157,7 @@
tty->driver_data = vc;
}
- kbd = kbd_table + fg_console;
+ kbd = kbd_table + vc->vc_num;
if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT)
sysrq_alt = down ? keycode : 0;