[tfaber] 71301: [USBHUB] - Fix memory leak in failure case of CreateDeviceIds. Patch by Víctor Martínez Calvo. CID 1102364 CORE-11208 #resolve

Author: tfaber
Date: Mon May  9 17:44:16 2016
New Revision: 71301

URL: http://svn.reactos.org/svn/reactos?rev=71301&view=rev
Log:
[USBHUB]
- Fix memory leak in failure case of CreateDeviceIds. Patch by Víctor Martínez Calvo. CID
1102364
CORE-11208 #resolve

Modified:
    trunk/reactos/drivers/usb/usbhub/fdo.c

Modified: trunk/reactos/drivers/usb/usbhub/fdo.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/usb/usbhub/fdo.c?r…
==============================================================================
--- trunk/reactos/drivers/usb/usbhub/fdo.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/usb/usbhub/fdo.c	[iso-8859-1] Mon May  9 17:44:16 2016
@@ -1035,6 +1035,9 @@
         {
             // construct instance id buffer
             Index = swprintf(Buffer, L"%04d&%s",
HubDeviceExtension->InstanceCount, SerialBuffer) + 1;
+
+            ExFreePool(SerialBuffer);
+
             UsbChildExtension->usInstanceId.Buffer =
(LPWSTR)ExAllocatePool(NonPagedPool, Index * sizeof(WCHAR));
             if (UsbChildExtension->usInstanceId.Buffer == NULL)
             {
@@ -1047,7 +1050,6 @@
             //
             RtlCopyMemory(UsbChildExtension->usInstanceId.Buffer, Buffer, Index *
sizeof(WCHAR));
             UsbChildExtension->usInstanceId.Length =
UsbChildExtension->usInstanceId.MaximumLength = Index * sizeof(WCHAR);
-            ExFreePool(SerialBuffer);
 
             DPRINT("Usb InstanceId %wZ InstanceCount %x\n",
&UsbChildExtension->usInstanceId, HubDeviceExtension->InstanceCount);
             return Status;