[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 <clemens@ladisch.de>hifive-unleashed-5.1
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ac09a9251d
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a106cd3d9e
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@ -573,6 +573,8 @@ int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info
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if (info->device >= SNDRV_RAWMIDI_DEVICES)
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return -ENXIO;
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rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
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if (!rmidi)
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return -ENXIO;
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if (info->stream < 0 || info->stream > 1)
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return -EINVAL;
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pstr = &rmidi->streams[info->stream];
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