[Qemu-devel] [PATCH 01/10] usb-redir: Fix crash on migration with no client connected

[Gerd Hoffmann <kraxel@redhat.com>]

From: Hans de Goede <hdegoede@redhat.com>

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>
---
 hw/usb/redirect.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index d02a7b9..cf66df1 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1973,6 +1973,10 @@ 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;
-- 
1.7.9.7