Commit a106cd3d authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela

[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: default avatarClemens Ladisch <clemens@ladisch.de>
parent ac09a925
......@@ -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];
......
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