From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - lib 0001571]: Segfaults when trying to specify the preamble values (iec958 plugin) Date: Wed, 23 Nov 2005 17:45:13 +0100 Message-ID: <526677800cd6f3ab333348457ddf83ce@bugtrack.alsa-project.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [85.132.177.35]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id 2F771176 for ; Wed, 23 Nov 2005 17:45:14 +0100 (MET) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: nboullis Assigned To: ====================================================================== Project: ALSA - lib Issue ID: 1571 Category: 1_pcm - digital audio Reproducibility: always Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 11-17-2005 01:51 CET Last Modified: 11-23-2005 17:45 CET ====================================================================== Summary: Segfaults when trying to specify the preamble values (iec958 plugin) Description: When I try to specify the preamble values for the iec958 plugin (see the attached .asoundrc file for an example), I get segfaults with all applications that try to use the corresponding device. If I simply comment out the 3 preamble lines, the application runs fine (well, not with the null output, but with a real S/PDIF device) but I get no sound since I'm not using the correct preamble values. (This is with version 1.0.10.) Here is a backtrace I got with valgrind (using xmms as the application): ==15761== ==15761== Thread 5: ==15761== Invalid read of size 4 ==15761== at 0x1CADD3F7: snd_config_iterator_first (conf.c:3146) ==15761== by 0x1CB373BB: _snd_pcm_iec958_open (pcm_iec958.c:623) ==15761== by 0x1CAF9CB6: snd_pcm_open_conf (pcm.c:2070) ==15761== by 0x1CAFA61A: snd_pcm_open_slave (pcm.c:2187) ==15761== by 0x1CB1A32C: _snd_pcm_plug_open (pcm_plug.c:1140) ==15761== by 0x1CAF9CB6: snd_pcm_open_conf (pcm.c:2070) ==15761== by 0x1CAFA2BD: snd_pcm_open_noupdate (pcm.c:2102) ==15761== by 0x1CAFA376: snd_pcm_open (pcm.c:2123) ==15761== by 0x1CAB0E18: (within /usr/lib/xmms/Output/libALSA.so) ==15761== by 0x1CAB09D1: alsa_open (in /usr/lib/xmms/Output/libALSA.so) ==15761== by 0x1CBB0469: (within /usr/lib/xmms/Input/libmpg123.so) ==15761== by 0x1BAFFB62: start_thread (in /lib/tls/libpthread-0.60.so) ==15761== Address 0x4 is not stack'd, malloc'd or (recently) free'd Hope this helps. ====================================================================== ---------------------------------------------------------------------- nboullis - 11-19-05 01:35 ---------------------------------------------------------------------- As asked by Takashi Iwai, I just re-did the same experiment within gdb; here is the backtrace: #0 0xb6f5b0b7 in snd_config_iterator_first () from /usr/lib/libasound.so.2 #1 0xb6fb23dc in _snd_pcm_iec958_open () from /usr/lib/libasound.so.2 #2 0xb6f75a37 in snd_async_handler_get_pcm () from /usr/lib/libasound.so.2 #3 0xb6f763ab in snd_pcm_open_slave () from /usr/lib/libasound.so.2 #4 0xb6f960f5 in _snd_pcm_plug_open () from /usr/lib/libasound.so.2 #5 0xb6f75a37 in snd_async_handler_get_pcm () from /usr/lib/libasound.so.2 #6 0xb6f7604e in snd_async_handler_get_pcm () from /usr/lib/libasound.so.2 #7 0xb6f76107 in snd_pcm_open () from /usr/lib/libasound.so.2 #8 0xb7001e19 in alsa_open () from /usr/lib/xmms/Output/libALSA.so #9 0xb70019d2 in alsa_open () from /usr/lib/xmms/Output/libALSA.so #10 0xb6ebe46a in get_iplugin_info () from /usr/lib/xmms/Input/libmpg123.so #11 0xb7d8fb63 in start_thread () from /lib/tls/libpthread.so.0 #12 0xb7bfa18a in clone () from /lib/tls/libc.so.6 (I have lost my 1.0.10 build, so this is with debian's 1.0.9-3 (with my preamble patch applied). If it is usefull, I can do it again with a clean 1.0.10 ou CVS HEAD build. ---------------------------------------------------------------------- tiwai - 11-23-05 17:45 ---------------------------------------------------------------------- OK it's a typo. The patch is attached. Issue History Date Modified Username Field Change ====================================================================== 11-17-05 01:51 nboullis New Issue 11-17-05 01:51 nboullis File Added: .asoundrc 11-17-05 01:53 nboullis Issue Monitored: nboullis 11-19-05 01:35 nboullis Note Added: 0006760 11-23-05 17:45 tiwai Note Added: 0006820 ====================================================================== ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. 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