From e440ab40efba23b49fcb9d27c796c03db57c0fe9 Mon Sep 17 00:00:00 2001
From: Christian Helmuth <christian.helmuth@genode-labs.com>
Date: Fri, 19 Jan 2024 16:29:09 +0100
Subject: [PATCH] virt/lx_emul: check for NULL urb in usb_submit_urb()

The Linux implementation also includes this check. NULL urb submission
happened with Wacom touch devices.
---
 .../src/lib/lx_emul/virt/shadow/drivers/usb/core/urb.c         | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/repos/dde_linux/src/lib/lx_emul/virt/shadow/drivers/usb/core/urb.c b/repos/dde_linux/src/lib/lx_emul/virt/shadow/drivers/usb/core/urb.c
index 621af9bc84..15e4adaf60 100644
--- a/repos/dde_linux/src/lib/lx_emul/virt/shadow/drivers/usb/core/urb.c
+++ b/repos/dde_linux/src/lib/lx_emul/virt/shadow/drivers/usb/core/urb.c
@@ -92,6 +92,9 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
 	int ret = 0;
 	unsigned timeout_jiffies = msecs_to_jiffies(10000u);
 
+	if (!urb || !urb->complete)
+		return -EINVAL;
+
 	if (!urb->dev->bus)
 		return -ENODEV;