Microsoft KB Archive/820177

= The RNDIS Driver Leaks RAM Pages When You Remove a Network Adapter =

Article ID: 820177

Article Last Modified on 5/27/2005

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APPLIES TO


 * Microsoft Windows CE .NET 4.1

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SYMPTOMS
When you remove a Universal Serial Bus (USB) network adapter from a Windows CE .NET 4.1-based device, or when you suspend the device, a large block of memory remains allocated by the network drivers. When you reinsert the USB network adapter, or when you resume the device, the allocated memory is not reused and additional memory is allocated.



CAUSE
The Remote NDIS (RNDIS) driver does not release memory pages that are allocated to handle direct memory access (DMA) to the network adapter. 32 8-kilobyte buffers are allocated each time the network adapter is attached. Because suspending and resuming the device causes a simulated removal and reinsertion of the network adapter, the problem occurs even if you do not physically remove the network adapter.



Hotfix Information
A supported software update is now available from Microsoft as Windows CE 4.1 Core OS QFE 820177. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
Install all prior hotfixes for this version of Windows CE.

Restart Requirement
You do not have to restart your computer after you apply this hotfix.

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English version of this package has the file attributes (or later) that are listed in the following table.   Date         Time   Version    Size       File name -  21-May-2003  23:45  4.1.3.521  1,092,200  Wincepb41-030521-kb820177-armv4.exe 21-May-2003 23:45  4.1.3.521  1,096,296  Wincepb41-030521-kb820177-armv4i.exe 21-May-2003 23:45  4.1.3.521  1,092,200  Wincepb41-030521-kb820177-armv4t.exe 21-May-2003 23:44  4.1.3.521  1,063,528  Wincepb41-030521-kb820177-mips16.exe 21-May-2003 23:45  4.1.3.521  1,120,872  Wincepb41-030521-kb820177-mipsii.exe 21-May-2003 23:45  4.1.3.521  1,120,872  Wincepb41-030521-kb820177-mipsii_fp.exe 21-May-2003 23:46  4.1.3.521  1,124,968  Wincepb41-030521-kb820177-mipsiv.exe 21-May-2003 23:46  4.1.3.521  1,124,968  Wincepb41-030521-kb820177-mipsiv_fp.exe 21-May-2003 23:44  4.1.3.521  1,079,912  Wincepb41-030521-kb820177-sh3.exe 21-May-2003 23:45  4.1.3.521  1,079,912  Wincepb41-030521-kb820177-sh4.exe 21-May-2003 23:44  4.1.3.521  1,030,760  Wincepb41-030521-kb820177-x86.exe The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time                     Size    File name --  Path: Public\Common\Oak\Lib\Armv4\Debug 19-May-2003 23:22                    116,412  Natwdm.lib 19-May-2003 23:26                    449,076  Rndismp.lib 19-May-2003 23:26                    527,676  Usb8023.lib

Path: Public\Common\Oak\Lib\Armv4\Retail 19-May-2003 23:15                    100,350  Natwdm.lib 19-May-2003 23:18                    285,160  Rndismp.lib 19-May-2003 23:19                    280,984  Usb8023.lib

Path: Public\Common\Oak\Lib\Armv4i\Debug 19-May-2003 23:07                    116,608  Natwdm.lib 19-May-2003 23:11                    449,586  Rndismp.lib 19-May-2003 23:11                    528,104  Usb8023.lib

Path: Public\Common\Oak\Lib\Armv4i\Retail 19-May-2003 23:00                    100,590  Natwdm.lib 19-May-2003 23:04                    285,758  Rndismp.lib 19-May-2003 23:04                    281,434  Usb8023.lib

Path: Public\Common\Oak\Lib\Armv4t\Debug 19-May-2003 22:53                    110,198  Natwdm.lib 19-May-2003 22:56                    427,074  Rndismp.lib 19-May-2003 22:56                    510,746  Usb8023.lib

Path: Public\Common\Oak\Lib\Armv4t\Retail 19-May-2003 22:45                    100,610  Natwdm.lib 19-May-2003 22:49                    284,420  Rndismp.lib 19-May-2003 22:49                    282,056  Usb8023.lib

Path: Public\Common\Oak\Lib\Mips16\Debug 19-May-2003 23:51                    102,202  Natwdm.lib 19-May-2003 23:55                    408,932  Rndismp.lib 19-May-2003 23:55                    488,812  Usb8023.lib

Path: Public\Common\Oak\Lib\Mips16\Retail 19-May-2003 23:44                     86,770  Natwdm.lib 19-May-2003 23:48                    261,364  Rndismp.lib 19-May-2003 23:48                    264,060  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsii\Debug 19-May-2003 23:37                    112,608  Natwdm.lib 19-May-2003 23:40                    451,068  Rndismp.lib 19-May-2003 23:40                    550,316  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsii\Retail 19-May-2003 23:29                     96,082  Natwdm.lib 19-May-2003 23:33                    291,682  Rndismp.lib 19-May-2003 23:33                    288,406  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Debug 20-May-2003 00:06                    112,638  Natwdm.lib 20-May-2003 00:09                    451,174  Rndismp.lib 20-May-2003 00:09                    550,424  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsii_fp\Retail 19-May-2003 23:58                     96,130  Natwdm.lib 20-May-2003 00:02                    291,780  Rndismp.lib 20-May-2003 00:02                    288,516  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsiv\Debug 20-May-2003 01:05                    116,214  Natwdm.lib 20-May-2003 01:09                    454,160  Rndismp.lib 20-May-2003 01:09                    552,848  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsiv\Retail 20-May-2003 00:58                     99,304  Natwdm.lib 20-May-2003 01:01                    292,446  Rndismp.lib 20-May-2003 01:02                    288,974  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug 20-May-2003 00:35                    116,246  Natwdm.lib 20-May-2003 00:39                    454,266  Rndismp.lib 20-May-2003 00:39                    552,956  Usb8023.lib

Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail 20-May-2003 00:28                     99,350  Natwdm.lib 20-May-2003 00:32                    292,544  Rndismp.lib 20-May-2003 00:32                    289,084  Usb8023.lib

Path: Public\Common\Oak\Lib\Sh3\Debug 20-May-2003 00:20                    102,224  Natwdm.lib 20-May-2003 00:24                    411,406  Rndismp.lib 20-May-2003 00:24                    490,200  Usb8023.lib

Path: Public\Common\Oak\Lib\Sh3\Retail 20-May-2003 00:13                     91,912  Natwdm.lib 20-May-2003 00:17                    276,456  Rndismp.lib 20-May-2003 00:17                    276,310  Usb8023.lib

Path: Public\Common\Oak\Lib\Sh4\Debug 20-May-2003 00:50                    102,098  Natwdm.lib 20-May-2003 00:54                    411,154  Rndismp.lib 20-May-2003 00:54                    489,924  Usb8023.lib

Path: Public\Common\Oak\Lib\Sh4\Retail 20-May-2003 00:43                     91,678  Natwdm.lib 20-May-2003 00:47                    275,942  Rndismp.lib 20-May-2003 00:47                    275,830  Usb8023.lib

Path: Public\Common\Oak\Lib\X86\Debug 19-May-2003 22:38                     96,950  Natwdm.lib 19-May-2003 22:42                    394,270  Rndismp.lib 19-May-2003 22:42                    493,936  Usb8023.lib

Path: Public\Common\Oak\Lib\X86\Retail 19-May-2003 22:31                     89,064  Natwdm.lib 19-May-2003 22:35                    254,686  Rndismp.lib 19-May-2003 22:35                    261,780  Usb8023.lib



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbbug kbfix kbqfe KB820177

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