[alsa-devel] Segfault in pulseaudio since Alsa 1.1.7

[Jaroslav Kysela]

Dne 23.10.2018 v 08:43 Hyperion napsal(a):
>    I have narrowed to the simpler patch below :
>    Â
>    Quote:
>    diff -rNaud alsa-plugins-1.1.7/a52/pcm_a52.c
>    alsa-plugins-1.1.7-new/a52/pcm_a52.c
>    --- alsa-plugins-1.1.7/a52/pcm_a52.c 2018-10-16 14:00:22.000000000
>    +0200
>    +++ alsa-plugins-1.1.7-new/a52/pcm_a52.c 2018-10-23 08:35:15.699830909
>    +0200
>    @@ -978,7 +978,8 @@
>    if ((err = a52_set_hw_constraint(rec)) < 0) {
>    snd_pcm_ioplug_delete(&rec->io);
>    - goto error;
>    + free(rec);
>    + return err;
>    }
>    *pcmp = rec->io.pcm;
>    Â

It does not appear like a correct change, because rec->slave is
initialized in previous lines (snd_pcm_open calls). Could you inspect
rec->slave in gdb ?

						Jaroslav

> 
>    Â
> 
>    22.10.2018, 23:30, "Hyperion" <h1p8r10n at yandex.com>:
> 
>      Â Â Â Hi,
>         Â
>      Â Â Â Since the upgrade to Alsa 1.1.7, I get a segfault at
>      pulseaudio
>      Â Â Â startup. This have been discussed and documented here :
>      Â Â Â [1][1]https://www.linuxquestions.org/questions/slackware-14/cu
>      rrent-fri-oc
>      Â Â Â t-19-puseaudio-segfauts-4175640773/
>         Â
>      Â Â Â It seems that I found the origin of the bug : reverting these
>      2 commits
>      Â Â Â fixes the problem :
>      Â Â Â [2][2]http://git.alsa-project.org/?p=alsa-...792dc809c908cc
>      Â Â Â [3][3]http://git.alsa-project.org/?p=alsa-...5dc6e1594291e7
>      Â Â Â Then no more segfault in pulseaudio when accessing the USB
>      soundcard.
>         Â
>      Â Â Â Please could you fix it ?
>         Â
>      Â Â Â Regards
>      Â Â Â jp
>      References
>      Â Â Â Visible links
>      Â Â Â 1.
>      [4]https://www.linuxquestions.org/questions/slackware-14/current-fri
>      -oct-19-puseaudio-segfauts-4175640773/
>      Â Â Â 2.
>      [5]http://git.alsa-project.org/?p=alsa-plugins.git;a=commitdiff;h=fc
>      3f5d51062ff438780e568995792dc809c908cc
>      Â Â Â 3.
>      [6]http://git.alsa-project.org/?p=alsa-plugins.git;a=commitdiff;h=6b
>      996865126dd559ef186002e45dc6e1594291e7
>      Â Â Â Hidden links:
>      Â Â Â 4.
>      [7]https://www.linuxquestions.org/questions/slackware-14/current-fri
>      -oct-19-puseaudio-segfauts-4175640773/
>      _______________________________________________
>      Alsa-devel mailing list
>      [8]Alsa-devel at alsa-project.org
>      [9]http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
> References
> 
>    1. https://www.linuxquestions.org/questions/slackware-14/current-fri-oc
>    2. http://git.alsa-project.org/?p=alsa-...792dc809c908cc
>    3. http://git.alsa-project.org/?p=alsa-...5dc6e1594291e7
>    4. https://www.linuxquestions.org/questions/slackware-14/current-fri-oct-19-puseaudio-segfauts-4175640773/
>    5. http://git.alsa-project.org/?p=alsa-plugins.git;a=commitdiff;h=fc3f5d51062ff438780e568995792dc809c908cc
>    6. http://git.alsa-project.org/?p=alsa-plugins.git;a=commitdiff;h=6b996865126dd559ef186002e45dc6e1594291e7
>    7. https://www.linuxquestions.org/questions/slackware-14/current-fri-oct-19-puseaudio-segfauts-4175640773/
>    8. mailto:Alsa-devel at alsa-project.org
>    9. http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> _______________________________________________
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> Alsa-devel at alsa-project.org
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> 


-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.