Bug 49181

Summary:	USB audio module crashes the system
Product:	Drivers	Reporter:	Artem S. Tashkinov (aros)
Component:	Sound(ALSA)	Assignee:	Jaroslav Kysela (perex)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	alan, florian
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.6.2	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	Hardware/kernel information A device which causes a panic Errors preceding a crash dmesg up to a crash

Description Artem S. Tashkinov 2012-10-21 12:16:33 UTC

My system crashes when I try to enable usb-audio on my Logitech C510 webcam using Adobe Flash.

All other applications can read from the USB audio without problems.

Comment 1 Artem S. Tashkinov 2012-10-21 12:21:06 UTC

Created attachment 84141 [details]
Hardware/kernel information

Comment 2 Artem S. Tashkinov 2012-10-21 12:27:58 UTC

Created attachment 84151 [details]
A device which causes a panic

Comment 3 Artem S. Tashkinov 2012-10-21 13:13:05 UTC

Messages before the system freezes: http://imageshack.us/a/img685/9452/panicz.jpg

Comment 4 Artem S. Tashkinov 2012-10-21 13:41:43 UTC

Created attachment 84161 [details]
Errors preceding a crash

Comment 5 Artem S. Tashkinov 2012-10-21 19:42:59 UTC

Created attachment 84221 [details]
dmesg up to a crash

Comment 6 Artem S. Tashkinov 2012-11-07 21:02:23 UTC

This patch fixes this issue: https://lkml.org/lkml/2012/11/7/406

Comment 7 Florian Mickler 2012-11-11 18:45:06 UTC

A patch referencing this bug report has been merged in Linux v3.7-rc5:

commit f58161ba1b05a968e5136824b5a16b714b6a5317
Author: Takashi Iwai <tiwai@suse.de>
Date:   Thu Nov 8 08:52:45 2012 +0100

    ALSA: usb-audio: Fix crash at re-preparing the PCM stream