Date: Wed, 5 Nov 2003 21:12:59 -0800 (PST) From: kris@obsecurity.org, "Kennaway <kris"@FreeBSD.org To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/58989: vchans cause mplayer crash Message-ID: <20031106051259.B6D7769E@rot13.obsecurity.org> Resent-Message-ID: <200311060520.hA65KHS3073364@freefall.freebsd.org>
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>Number: 58989 >Category: kern >Synopsis: vchans cause mplayer crash >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Nov 05 21:20:16 PST 2003 >Closed-Date: >Last-Modified: >Originator: Kris Kennaway >Release: FreeBSD 5.1-RELEASE-p10 i386 >Organization: >Environment: System: FreeBSD rot13.obsecurity.org 5.1-RELEASE-p10 FreeBSD 5.1-RELEASE-p10 #0: Wed Oct 8 04:08:28 PDT 2003 kkenn@rot13.obsecurity.org:/usr/obj/usr/src/sys/ROT13 i386 pcm0: <AudioPCI ES1370> port 0xa400-0xa43f irq 9 at device 13.0 on pci2 >Description: When hw.snd.pcm0.vchans=1, seeking on a movie stream (e.g. pressing forward/back arror during playback) will cause mplayer to crash. There are no other applications accessing the sound driver, although vchans work as expected to multiplex the sound if I try. It is likely that the sound driver is behaving differently when vchans are enabled (e.g. returning an unexpected error), and mplayer does not handle this unexpected condition. Without further debugging I cannot tell if mplayer is at fault or the pcm driver. >How-To-Repeat: hw.snd.maxautovchans=5 hw.snd.pcm0.vchans=1 Install mplayer and use it to play a video file. Press the right arrow a few dozen times to skip through the movie. At some point mplayer will crash. >Fix: Setting hw.snd.pcm0.vchans=0 "fixes" this problem. >Release-Note: >Audit-Trail: >Unformatted:
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