Bug 672720 – getting 'ctrl buffer too small' error on USB passthrough

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Bug 672720 - getting 'ctrl buffer too small' error on USB passthrough

Summary:	getting 'ctrl buffer too small' error on USB passthrough

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	qemu-kvm (Show other bugs)
Sub Component:
Version:	6.0
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Alex Williamson
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	580954
	Show dependency tree / graph

Reported:	2011-01-25 20:14 EST by Henry Maine
Modified:	2011-05-19 09:01 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	qemu-kvm-0.12.1.2-2.134.el6
Doc Type:	Bug Fix
Doc Text:	Cause: qemu-kvm buffer for USB control requests was too small for some devices (e.g. some USB cameras) when using USB passthrough. Consequence: some devices made qemu-kvm show a message like: "'husb: ctrl buffer too small (3273 > 2048)'" Fix: increased buffer for USB control requests from 2048 bytes to 8192 bytes. Consequence: some devices that didn't work using USB passthrough now work.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-19 07:20:55 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0534	normal	SHIPPED_LIVE	Important: qemu-kvm security, bug fix, and enhancement update	2011-05-19 07:20:36 EDT

Groups: None (edit)

Description Henry Maine 2011-01-25 20:14:55 EST

Description of problem:

When trying to connect a USB camera to a Windows 7 VM running on RHEL6, Windows reports an error on the USB device and the following error shows up in the VM
log file:

'husb: ctrl buffer too small (3273 > 2048)'

This appears to be the exact same issue as BZ# 627343 which was fixed for RHEL5.
Any chance we can get the patch into RHEL6?

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.113.el6_0.6.x86_64

How reproducible:

Always

Comment 6 Henry Maine 2011-02-14 19:17:49 EST

Hi Li,

I tested the updated qemu-kvm package on the system we were working with earlier when we filed the bug and it seems to have fixed the problem.

Thanks,
Henry

Comment 8 Eduardo Habkost 2011-05-03 14:57:11 EDT

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Cause: qemu-kvm buffer for USB control requests was too small for some devices (e.g. some USB cameras) when using USB passthrough.

Consequence: some devices made qemu-kvm show a message like: "'husb: ctrl buffer too small (3273 > 2048)'"

Fix: increased buffer for USB control requests from 2048 bytes to 8192 bytes.

Consequence: some devices that didn't work using USB passthrough now work.

Comment 9 errata-xmlrpc 2011-05-19 07:20:55 EDT

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html

Comment 10 errata-xmlrpc 2011-05-19 09:01:24 EDT

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html

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