[pulseaudio-tickets] [PulseAudio] #806: Bus Errors when /dev/shm is (almost) full

[PulseAudio]

#806: Bus Errors when /dev/shm is (almost) full
---------------------------+------------------------------------------------
 Reporter:  raboof         |       Owner:  lennart
     Type:  defect         |      Status:  new    
Milestone:                 |   Component:  core   
 Keywords:  bus crash shm  |  
---------------------------+------------------------------------------------
 libpulse 0.9.19

 When /dev/shm is (almost) full, which can be simulated with "dd
 if=/dev/zero of=test2 count=... bs=1M", pulseaudio tends to produce bus
 errors. The exact error is not consistent, I've seen:

 {{{
 W: pid.c: Stale PID file, overwriting.

 Program received signal SIGBUS, Bus error.
 memset () at ../sysdeps/i386/i686/memset.S:85
 85      ../sysdeps/i386/i686/memset.S: No such file or directory.
         in ../sysdeps/i386/i686/memset.S
 Current language:  auto
 The current source language is "auto; currently asm".
 (gdb) where
 #0  memset () at ../sysdeps/i386/i686/memset.S:85
 #1  0x00143910 in ?? () from /usr/lib/libpulsecore-0.9.19.so
 #2  0x00143b62 in pa_silence_memchunk_get () from
 /usr/lib/libpulsecore-0.9.19.so
 #3  0x0015b6e1 in pa_sink_new () from /usr/lib/libpulsecore-0.9.19.so
 #4  0x007e1bbf in pa_alsa_sink_new () from /usr/lib/pulse-0.9.19/modules
 /libalsa-util.so
 }}}

 or:

 {{{
 W: pid.c: Stale PID file, overwriting.

 Program received signal SIGBUS, Bus error.
 pa_atomic_load () at ./pulsecore/atomic.h:57
 57      ./pulsecore/atomic.h: No such file or directory.
         in ./pulsecore/atomic.h
 (gdb) where
 #0  pa_atomic_load () at ./pulsecore/atomic.h:57
 #1  pa_shm_cleanup () at pulsecore/shm.c:370
 #2  0x00918fed in pa_shm_create_rw (m=0x8063c60, size=67108864,
 shared=true, mode=448) at pulsecore/shm.c:109
 }}}

 While this is probably not an error that can be recovered from, it would
 be good to give a meaningful error message: the bug can manifest itself in
 unexpected places, like https://bugs.launchpad.net/ubuntu/+source/jack-
 audio-connection-kit/+bug/491329

-- 
Ticket URL: <http://pulseaudio.org/ticket/806>
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