diff --git a/sound/core/seq/seq_ump_client.c b/sound/core/seq/seq_ump_client.c
index 9079ccfdc866..ccd93599b493 100644
--- a/sound/core/seq/seq_ump_client.c
+++ b/sound/core/seq/seq_ump_client.c
@@ -37,6 +37,7 @@ struct seq_ump_client {
 	struct snd_ump_endpoint *ump;	/* assigned endpoint */
 	int seq_client;			/* sequencer client id */
 	int opened[2];			/* current opens for each direction */
+	rwlock_t output_lock;		/* protects out_rfile output access */
 	struct snd_rawmidi_file out_rfile; /* rawmidi for output */
 	struct seq_ump_input_buffer input; /* input parser context */
 	void *ump_info[SNDRV_UMP_MAX_BLOCKS + 1]; /* shadow of seq client ump_info */
@@ -88,6 +89,7 @@ static int seq_ump_process_event(struct snd_seq_event *ev, int direct,
 	unsigned char type;
 	int len;
 
+	guard(read_lock_irqsave)(&client->output_lock);
 	substream = client->out_rfile.output;
 	if (!substream)
 		return -ENODEV;
@@ -106,6 +108,7 @@ static int seq_ump_process_event(struct snd_seq_event *ev, int direct,
 static int seq_ump_client_open(struct seq_ump_client *client, int dir)
 {
 	struct snd_ump_endpoint *ump = client->ump;
+	struct snd_rawmidi_file rfile = {};
 	int err;
 
 	guard(mutex)(&ump->open_mutex);
@@ -113,9 +116,11 @@ static int seq_ump_client_open(struct seq_ump_client *client, int dir)
 		err = snd_rawmidi_kernel_open(&ump->core, 0,
 					      SNDRV_RAWMIDI_LFLG_OUTPUT |
 					      SNDRV_RAWMIDI_LFLG_APPEND,
-					      &client->out_rfile);
+					      &rfile);
 		if (err < 0)
 			return err;
+		scoped_guard(write_lock_irqsave, &client->output_lock)
+			client->out_rfile = rfile;
 	}
 	client->opened[dir]++;
 	return 0;
@@ -125,11 +130,19 @@ static int seq_ump_client_open(struct seq_ump_client *client, int dir)
 static int seq_ump_client_close(struct seq_ump_client *client, int dir)
 {
 	struct snd_ump_endpoint *ump = client->ump;
+	struct snd_rawmidi_file rfile = {};
 
 	guard(mutex)(&ump->open_mutex);
-	if (!--client->opened[dir])
-		if (dir == STR_OUT)
-			snd_rawmidi_kernel_release(&client->out_rfile);
+	if (!--client->opened[dir]) {
+		if (dir == STR_OUT) {
+			scoped_guard(write_lock_irqsave, &client->output_lock) {
+				rfile = client->out_rfile;
+				client->out_rfile = (struct snd_rawmidi_file){};
+			}
+			if (rfile.rmidi)
+				snd_rawmidi_kernel_release(&rfile);
+		}
+	}
 	return 0;
 }
 
@@ -467,6 +480,7 @@ static int snd_seq_ump_probe(struct snd_seq_device *dev)
 
 	INIT_WORK(&client->group_notify_work, handle_group_notify);
 	client->ump = ump;
+	rwlock_init(&client->output_lock);
 
 	client->seq_client =
 		snd_seq_create_kernel_client(card, ump->core.device,