>Number: 156726 >Category: amd64 >Synopsis: snd_uaudio(4) fails to detach when mixer is open >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Apr 29 20:30:12 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Arnaud Lacombe >Release: 8.2-STABLE >Organization: n/a >Environment: FreeBSD shai 8.2-STABLE FreeBSD 8.2-STABLE #1: Wed Mar 9 15:22:10 EST 2011 >Description: When a userland application has an open file descriptor to /dev/pcmN, backed by an snd_uaudio(4) based device, trying to detach this device will hang the USB stack until the userland application is closed. Ultimately, this could lead to a complete stall of the USB stack.
It would be expected that every child of snd_uaudio(4) just detach themselves, letting the userland die with EIO. >How-To-Repeat: plug a snd_uaudio adapter open aumix(1) unplug the adapter >Fix: >Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 To unsubscribe, send any mail to "[email protected]"
