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From: Takashi Iwai <tiwai@suse.de>
To: alsa-devel@alsa-project.org
Cc: Andreas Steinmetz <ast@domdv.de>
Subject: [PATCH 1/2] ALSA: seq: virmidi: Fix running status after receiving sysex
Date: Mon, 16 Mar 2020 10:05:05 +0100
Message-ID: <20200316090506.23966-2-tiwai@suse.de> (raw)
In-Reply-To: <20200316090506.23966-1-tiwai@suse.de>

The virmidi driver handles sysex event exceptionally in a short-cut
snd_seq_dump_var_event() call, but this missed the reset of the
running status.  As a result, it may lead to an incomplete command
right after the sysex when an event with the same running status was
queued.

Fix it by clearing the running status properly via alling
snd_midi_event_reset_decode() for that code path.

Reported-by: Andreas Steinmetz <ast@domdv.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/3b4a4e0f232b7afbaf0a843f63d0e538e3029bfd.camel@domdv.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/seq/seq_virmidi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c
index 626d87c1539b..77d7037d1476 100644
--- a/sound/core/seq/seq_virmidi.c
+++ b/sound/core/seq/seq_virmidi.c
@@ -81,6 +81,7 @@ static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev,
 			if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
 				continue;
 			snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream);
+			snd_midi_event_reset_decode(vmidi->parser);
 		} else {
 			len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev);
 			if (len > 0)
-- 
2.16.4


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-16  9:05 [PATCH 0/2] ALSA: seq: " Takashi Iwai
2020-03-16  9:05 ` Takashi Iwai [this message]
2020-03-16  9:05 ` [PATCH 2/2] ALSA: seq: oss: " Takashi Iwai

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