[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>
diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c
index a15f5e6..4641677 100644
--- a/sound/core/seq/seq_midi_event.c
+++ b/sound/core/seq/seq_midi_event.c
@@ -252,7 +252,7 @@
ev->type = status_event[ST_SPECIAL + c - 0xf0].event;
ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
- return 1;
+ return ev->type != SNDRV_SEQ_EVENT_NONE;
}
spin_lock_irqsave(&dev->lock, flags);