Bug 826035 – host kernel panic when passing usb audio device to guest

Bug 826035 - host kernel panic when passing usb audio device to guest

Summary:	host kernel panic when passing usb audio device to guest

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.3
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Jaroslav Kysela
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2012-05-29 08:40 EDT by Gerd Hoffmann
Modified:	2013-12-13 13:23 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2013-12-13 13:23:36 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
screen shot (digicam) (4.65 MB, image/jpeg) 2012-05-29 08:44 EDT, Gerd Hoffmann	no flags	Details
serial log #1 (4.53 KB, text/plain) 2012-05-29 09:24 EDT, Gerd Hoffmann	no flags	Details
serial console log #2 (16.20 KB, text/plain) 2012-05-29 09:25 EDT, Gerd Hoffmann	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Gerd Hoffmann 2012-05-29 08:40:21 EDT

Description of problem:
host kernel panics when assigning a usb audio device (logitech usb speaker) to a kvm guest.

Version-Release number of selected component (if applicable):
kernel-2.6.32-274.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Install guest (/me used rhel6, but probably doesn't matter).
2. Boot guest.
3. Start pulseaudio volume control on the host machine.
4. Assign usb speaker to the guest (virt-manager -> add hardware -> usb host device).
  
Actual results:
host kernel panics

Expected results:
host continues to run fine

Additional info:
With pulseaudio volume control not started it works just fine.

Most likely triggered by qemu sending usbfs ioctls (USBDEVFS_DISCONNECT or USBDEVFS_RESET) to the usb speakers while they are in use by pulse.

Comment 2 Gerd Hoffmann 2012-05-29 08:44:00 EDT

Created attachment 587398 [details]
screen shot (digicam)

Comment 3 Gerd Hoffmann 2012-05-29 09:24:10 EDT

Created attachment 587408 [details]
serial log #1

Comment 4 Gerd Hoffmann 2012-05-29 09:25:46 EDT

Created attachment 587411 [details]
serial console log #2

Comment 8 Jaroslav Kysela 2012-11-23 09:54:47 EST

The ALSA USB driver was updated in recent RHEL 6.4 kernels.

Could you retest with the latest RHEL 6 kernel?

Comment 9 Gerd Hoffmann 2012-11-27 08:23:00 EST

Tested with 2.6.32-344.el6.x86_64, working fine now.

Comment 10 John W. Linville 2013-12-13 13:23:36 EST

Closing on the basis of comment 9...

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