Bug#989103: pulseaudio crashes on startup

[Michał Mirosław]

On Wed, May 26, 2021 at 10:19:31AM -0400, Felipe Sateler wrote:
> Control: tags -1 unreproducible moreinfo
> 
> 
> On Tue, May 25, 2021 at 10:27 PM Michał Mirosław <mirq-linux at rere.qmqm.pl>
> wrote:
> 
> > Package: pulseaudio
> > Version: 14.2-2
> > Severity: grave
> > Justification: renders package unusable
> > X-Debbugs-Cc: mirq-deboogs at rere.qmqm.pl
> >
> > After upgrade to bullseye, pulseaudio crashes on startup in
> > pa_alsa_sink_new() -> find_mixer() due to mapping==NULL.
> >
> 
> You have this in your config:
> 
> load-module module-alsa-sink device=hw:1,0 control=Wave
> 
> Does it crash if you remove that line?

Indeed this is the trigger.

load-module module-alsa-sink device=hw:1,0

works ok. Adding the mixer control name argument ("control=Wave" or
"control=Wave,0") makes pulseaudio segfault on startup. Guessing from
the documentation [1] version 14.0 had changes in code supporting this
case.

[1] https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-alsa-sink

Best Regards
Michał Mirosław