From a106cd3d9e88c8761bd0eac2ce402cc82bd11fea Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Sun, 20 Nov 2005 13:59:56 +0100 Subject: [PATCH] [ALSA] rawmidi: protect against invalid device number in snd_rawmidi_info_select() Modules: RawMidi Midlevel In snd_rawmidi_info_select(), check that the device identified by the passed device number actually exists. Signed-off-by: Clemens Ladisch --- sound/core/rawmidi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 7a86a9a08a15..d703545cae8a 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -573,6 +573,8 @@ int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info if (info->device >= SNDRV_RAWMIDI_DEVICES) return -ENXIO; rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device]; + if (!rmidi) + return -ENXIO; if (info->stream < 0 || info->stream > 1) return -EINVAL; pstr = &rmidi->streams[info->stream];