--- x/sound/core/rawmidi.c
+++ y/sound/core/rawmidi.c
@@ -607,13 +607,19 @@ int snd_rawmidi_kernel_release(struct sn
 }
 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
 
+static DEFINE_MUTEX(rawmidi_poll_mutex);
+
 static int snd_rawmidi_release(struct inode *inode, struct file *file)
 {
 	struct snd_rawmidi_file *rfile;
 	struct snd_rawmidi *rmidi;
 	struct module *module;
 
+	mutex_lock(&rawmidi_poll_mutex);
 	rfile = file->private_data;
+	file->private_data = NULL;
+	mutex_unlock(&rawmidi_poll_mutex);
+
 	rmidi = rfile->rmidi;
 	rawmidi_release_priv(rfile);
 	kfree(rfile);
@@ -1649,7 +1655,11 @@ static __poll_t snd_rawmidi_poll(struct
 {
 	struct snd_rawmidi_file *rfile;
 	struct snd_rawmidi_runtime *runtime;
-	__poll_t mask;
+	__poll_t mask = 0;
+
+	mutex_lock(&rawmidi_poll_mutex);
+	if (!file->private_data)
+		goto out;
 
 	rfile = file->private_data;
 	if (rfile->input != NULL) {
@@ -1661,7 +1671,6 @@ static __poll_t snd_rawmidi_poll(struct
 		runtime = rfile->output->runtime;
 		poll_wait(file, &runtime->sleep, wait);
 	}
-	mask = 0;
 	if (rfile->input != NULL) {
 		if (snd_rawmidi_ready(rfile->input))
 			mask |= EPOLLIN | EPOLLRDNORM;
@@ -1670,6 +1679,8 @@ static __poll_t snd_rawmidi_poll(struct
 		if (snd_rawmidi_ready(rfile->output))
 			mask |= EPOLLOUT | EPOLLWRNORM;
 	}
+out:
+	mutex_unlock(&rawmidi_poll_mutex);
 	return mask;
 }