From 49c6e010498f6966d7bcd7014eb90fcdda7c86bd Mon Sep 17 00:00:00 2001
From: Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
Date: Mon, 25 Jul 2022 11:35:51 +0200
Subject: [PATCH] qemu-usb: ignore invalid USB data packets

Fix genodelabs/genode#4574
---
 repos/libports/src/lib/qemu-usb/host.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/repos/libports/src/lib/qemu-usb/host.cc b/repos/libports/src/lib/qemu-usb/host.cc
index 624bf1a8ed..a1933b2b22 100644
--- a/repos/libports/src/lib/qemu-usb/host.cc
+++ b/repos/libports/src/lib/qemu-usb/host.cc
@@ -790,7 +790,8 @@ static void usb_host_handle_data(USBDevice *udev, USBPacket *p)
 		return;
 	default:
 		error("not supported data request");
-		break;
+		p->status = USB_RET_NAK;
+		return;
 	}
 
 	try {