[PATCH 5/26] fix checking whether new keycode fits size-wise

Vojtech Pavlik
2005-09-10T22:41:50Z

Subject: [PATCH] Input: fix checking whether new keycode fits size-wise
From: Ian Campbell <ijc@hellion.org.uk>
Date: 1125816074 -0500

When dev->keycodesize == sizeof(int) the old code produces
incorrect result.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

---

drivers/char/keyboard.c | 2 +-
drivers/input/evdev.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

4cee99564db7f65a6f88e4b752da52768cde3802
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -200,7 +200,7 @@ int setkeycode(unsigned int scancode, un
return -EINVAL;
if (keycode < 0 || keycode > KEY_MAX)
return -EINVAL;
- if (keycode >> (dev->keycodesize * 8))
+ if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
return -EINVAL;

oldkey = SET_INPUT_KEYCODE(dev, scancode, keycode);
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -320,7 +320,7 @@ static long evdev_ioctl(struct file *fil
if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
if (get_user(v, ip + 1)) return -EFAULT;
if (v < 0 || v > KEY_MAX) return -EINVAL;
- if (v >> (dev->keycodesize * 8)) return -EINVAL;
+ if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8))) return -EINVAL;
u = SET_INPUT_KEYCODE(dev, t, v);
clear_bit(u, dev->keybit);
set_bit(v, dev->keybit);