@@ -321,6 +321,9 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer,
struct input_event event;
int retval;
+ if (count < input_event_size())
+ return -EINVAL;
+
retval = mutex_lock_interruptible(&evdev->mutex);
if (retval)
return retval;
@@ -330,17 +333,16 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer,
goto out;
}
- while (retval < count) {
-
+ do {
if (input_event_from_user(buffer + retval, &event)) {
retval = -EFAULT;
goto out;
}
+ retval += input_event_size();
input_inject_event(&evdev->handle,
event.type, event.code, event.value);
- retval += input_event_size();
- }
+ } while (retval + input_event_size() <= count);
out:
mutex_unlock(&evdev->mutex);