Input: check keycodesize when adjusting keymaps
When changing key mappings we need to make sure that the new keycode value can be stored in dev->keycodesize bytes. Signed-off-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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@ -198,10 +198,10 @@ int setkeycode(unsigned int scancode, unsigned int keycode)
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if (scancode >= dev->keycodemax)
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return -EINVAL;
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if (keycode > KEY_MAX)
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return -EINVAL;
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if (keycode < 0 || keycode > KEY_MAX)
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return -EINVAL;
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if (keycode >> (dev->keycodesize * 8))
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return -EINVAL;
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oldkey = SET_INPUT_KEYCODE(dev, scancode, keycode);
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@ -320,6 +320,7 @@ static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
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if (get_user(v, ip + 1)) return -EFAULT;
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if (v < 0 || v > KEY_MAX) return -EINVAL;
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if (v >> (dev->keycodesize * 8)) return -EINVAL;
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u = SET_INPUT_KEYCODE(dev, t, v);
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clear_bit(u, dev->keybit);
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set_bit(v, dev->keybit);
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