Bug 469593 - Fix for libusb hotplug garbage when serial number is empty
Summary: Fix for libusb hotplug garbage when serial number is empty
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Fedora
Classification: Fedora
Component: pcsc-lite
Version: 12
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Bob Relyea
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-11-02 23:40 UTC by Ludovic LANGE
Modified: 2009-12-21 06:50 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2009-12-21 06:50:23 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
Patch to apply to hotplug_libusb.c (94 bytes, text/plain)
2008-11-02 23:40 UTC, Ludovic LANGE
no flags Details

Description Ludovic LANGE 2008-11-02 23:40:11 UTC
Created attachment 322251 [details]
Patch to apply to hotplug_libusb.c

Description of problem:
I am writing an ifd driver for an USB smartcard reader.

It seems that this reader doesn't have an USB "serial number" property defined.

When detecting the reader, PCSC-lite adds random garbage to the reader name, and there is some memory corruption which
prevent the normal function of the PCSC stack.
(PCSC-lite is compiled with ADD_SERIAL_NUMBER)

I traced this problem back to the file hotplug_libusb.c and provide a simple fix to this problem.

With this patch, the problem is gone, the driver does function normally and there is no garbage neither in the logs
or in the reader name.

Version-Release number of selected component (if applicable):
pcsc-lite-1.4.4-3.fc9.i386

How reproducible:
Not easy : you have to use PCSC-lite with an USB Smartcard reader which DOES NOT have an USB Serial Number defined.
The reader is an Infinity USB Unlimited ( http://www.infinityusb.com/default.asp?show=productsdetail&ProductID=11 ), here is the "lsusb -v" output :
====================
Bus 005 Device 047: ID 104f:0004  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x104f 
  idProduct          0x0004 
  bcdDevice            1.00
  iManufacturer           1 WB Electronics
  iProduct                2 Infinity USB Unlimited
  iSerial                 3 
  bNumConfigurations      1
...
====================

To reproduce, you also have to have a driver for this reader, and since I haven't released one yet, it's not that easy.

Steps to Reproduce:
1. Plug the reader in
2. look at the log
  
Actual results:
(Random garbage appended to the reader name)
Nov  2 21:28:49 xps pcscd: readerfactory.c:1113:RFInitializeReader() Attempting startup of IUSB (#010¢#004¸#030¢#004¸ß<97>þ#002#010¢#004¸#010¢#004¸$<9c>O) 00 00 using /usr/lib/pcsc/drivers/ifd-iuu.bundle/Contents/Linux/libiuu.so.1.0.0

Expected results:
(No serial number)
Nov  2 21:28:49 xps pcscd: readerfactory.c:1113:RFInitializeReader() Attempting startup of IUSB 00 00 using /usr/lib/pcsc/drivers/ifd-iuu.bundle/Contents/Linux/libiuu.so.1.0.0

Additional info:
* In the patch, I completely suppress the serial number output if there is an error retrieving the serial number property (len <= 0 denotes an error or an empty string)
* I've sent the patch upstream to PCSC developpers, so may be it'll be fixed in the current sources one day.

Comment 1 Bug Zapper 2009-06-10 03:09:16 UTC
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

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plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 9's end of life.

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we may not be able to fix it before Fedora 9 is end of life.  If you 
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Comment 2 Bug Zapper 2009-11-16 09:34:40 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 12 development cycle.
Changing version to '12'.

More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Comment 3 Kalev Lember 2009-12-21 06:50:23 UTC
The patch was applied upstream in 1.5.0 release: svn://svn.debian.org/pcsclite/trunk/PCSC@3197 and is also thus in Fedora by now. Closing the ticket.


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