[ALSA] seq_midi_event: fix parsing of F9/FD bytes
Check for a valid event type when encoding a system real-time message to prevent the bytes F9 or FD resulting in an empty sequencer message. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
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@ -252,7 +252,7 @@ int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c,
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ev->type = status_event[ST_SPECIAL + c - 0xf0].event;
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ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
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ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
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return 1;
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return ev->type != SNDRV_SEQ_EVENT_NONE;
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}
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spin_lock_irqsave(&dev->lock, flags);
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