If we pass in a device which is higher than SNDRV_RAWMIDI_DEVICES then this function just returns device + 1 which isn't helpful. I've modified it to return -EINVAL instead.
Also Smatch complains because the "device + 1" could be an integer overflow. It's harmless, but we may as well silence the warning.
Signed-off-by: Dan Carpenter error27@gmail.com --- V2: In the first version I made negative values return -EINVAL
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index eb68326..1633bac 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -829,6 +829,8 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card, if (get_user(device, (int __user *)argp)) return -EFAULT; + if (device > SNDRV_RAWMIDI_DEVICES) + return -EINVAL; mutex_lock(®ister_mutex); device = device < 0 ? 0 : device + 1; while (device < SNDRV_RAWMIDI_DEVICES) {