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[ALSA] rawmidi: protect against invalid device number in snd_rawmidi_info_select()

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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>
This commit is contained in:
Clemens Ladisch 2005-11-20 13:59:56 +01:00 committed by Jaroslav Kysela
parent ac09a9251d
commit a106cd3d9e
1 changed files with 2 additions and 0 deletions
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2
sound/core/rawmidi.c
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@ -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];