diff --git a/drivers/char/adsprpc.c b/drivers/char/adsprpc.c
index 0f92eab72e68..5fdd69044425 100644
--- a/drivers/char/adsprpc.c
+++ b/drivers/char/adsprpc.c
@@ -3637,6 +3637,12 @@ static int fastrpc_init_attach_process(struct fastrpc_file *fl,
 	remote_arg_t ra[1];
 	struct fastrpc_ioctl_invoke_async ioctl;
 
+	if (fl->dev_minor == MINOR_NUM_DEV) {
+		err = -ECONNREFUSED;
+		ADSPRPC_ERR(
+			"untrusted app trying to attach to privileged DSP PD\n");
+		return err;
+	}
 	/*
 	 * Prepare remote arguments for creating thread group
 	 * in guestOS/staticPD on the remote subsystem.
@@ -3911,6 +3917,13 @@ static int fastrpc_init_create_static_process(struct fastrpc_file *fl,
 		unsigned int pageslen;
 	} inbuf;
 
+	if (fl->dev_minor == MINOR_NUM_DEV) {
+		err = -ECONNREFUSED;
+		ADSPRPC_ERR(
+			"untrusted app trying to attach to audio PD\n");
+		return err;
+	}
+
 	if (!init->filelen)
 		goto bail;