Bug 698230

Summary: Kernel Panic on USB Audio Disconnect
Product: [Fedora] Fedora Reporter: Carsten Clasohm <clasohm>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 14CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 863470 (view as bug list) Environment:
Last Closed: 2012-08-16 13:49:19 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 863470    
Attachments:
Description Flags
kernel panic netconsole output none

Description Carsten Clasohm 2011-04-20 13:39:01 UTC
Description of problem:

When disconnecting a USB headset (Plantronics Audio 626 DSP), the machine freezes with a kernel panic. This is reproducable, but doesn't happen every time.


Version-Release number of selected component (if applicable):

kernel-2.6.35.12-88.fc14.x86_64
pulseaudio-0.9.21-7.fc14.x86_64


How reproducible:

About 1 in 5 disconnects cause a kernel panic.


Steps to Reproduce:
1. Connect a USB headset, like the Plantronics Audio 626 DSP.
2. Wait for it to be detected.
3. Disconnect the USB headset.

  
Actual results:

Computer freezes, and netconsole shows a kernel panic.


Expected results:

USB audio devices can be disconnected without crashing the machine.


Additional info:

The netconsole log messages are attached.

This looks similar to http://answerpot.com/showthread.php?2160491-ALSA%3A+usb+-+prevent+kernel+panic+on+disconnect

Comment 1 Josh Boyer 2011-08-29 15:09:01 UTC
Does this still happen on the latest f14 or f15 kernel?

Comment 2 Carsten Clasohm 2011-09-20 12:23:45 UTC
(In reply to comment #1)
> Does this still happen on the latest f14 or f15 kernel?

I don't have access to the hardware to test this with at the moment.

Comment 3 Carsten Clasohm 2011-10-08 20:00:25 UTC
(In reply to comment #1)
> Does this still happen on the latest f14 or f15 kernel?

Still happens with 2.6.35.14-97.fc14.x86_64.

Comment 4 Carsten Clasohm 2011-10-08 20:01:26 UTC
Created attachment 527044 [details]
kernel panic netconsole output

Comment 5 Fedora End Of Life 2012-08-16 13:49:22 UTC
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