From 106a39c50211b7c7e96ffb47ad9deae5d9be6d84 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 15 Mar 2013 11:52:37 +0100
Subject: [PATCH] usb-redir: Fix crash on migration with no client connected

If no client is connected on the src side, then we won't receive a
parser during migrate, in this case usbredir_post_load() should be a nop,
rather then to try to derefefence the NULL dev->parser pointer.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 3713e1485e6eace7d48b9c790602cfd92c616e5f)
---
 hw/usb/redirect.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index 4d23b66..bf6aaf0 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -2008,6 +2008,10 @@ static int usbredir_post_load(void *priv, int version_id)
 {
     USBRedirDevice *dev = priv;
 
+    if (dev->parser == NULL) {
+        return 0;
+    }
+
     switch (dev->device_info.speed) {
     case usb_redir_speed_low:
         dev->dev.speed = USB_SPEED_LOW;