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The Advanced Linux Sound Architecture (ALSA) - library
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Brendan Shanks 7cea8c1562 pcm: dshare: Fix overflow when slave_hw_ptr rolls over boundary 
In snd_pcm_dshare_sync_area() when 'slave_hw_ptr' rolls over
'slave_boundary', the wrong variable is checked ('dshare->slave_hw_ptr' vs
the local 'slave_hw_ptr'). In some cases, this results in 'slave_hw_ptr'
not rolling over correctly. 'slave_size' and 'size' are then much too
large, and the for loop blocks for several minutes copying samples.

This was likely only triggered on 32-bit systems, since the PCM boundary
is computed based on LONG_MAX and is much larger on 64-bit systems.

This same change was made to pcm_dmix in commit
6c7f60f7a9 ("Fix boundary overlap”) from
June 2005.

Signed-off-by: Brendan Shanks <brendan.shanks@teradek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-02-12 14:37:44 +01:00
alsalisp Change FSF address (Franklin Street) 2017-11-14 14:29:26 +01:00
aserver a set of fixes to reduce gcc warnings 2018-03-27 15:16:41 +02:00
doc doxygen: Suppress timestamp 2016-06-23 16:29:07 +02:00
include conf: rename snd_conf_load1() to _snd_config_load_with_include() 2019-01-07 13:15:34 +01:00
m4 Add the attributes.m4 macro file from xine/lscube. 2008-11-21 13:04:19 +01:00
modules modules: smixer_python - add support for python3 2018-03-27 14:51:39 +02:00
src pcm: dshare: Fix overflow when slave_hw_ptr rolls over boundary 2019-02-12 14:37:44 +01:00
test test/audio_time: remove unused variables 2018-10-24 12:07:33 +02:00
utils utils/alsa.m4: conditionally enable libdl in AM_PATH_ALSA m4 macro 2018-11-02 14:57:50 +01:00
.gitignore initial version of .travis.yml file 2018-10-24 16:07:58 +02:00
.travis.yml initial version of .travis.yml file 2018-10-24 16:07:58 +02:00
acinclude.m4 fixed for the recent autoconf. 2004-01-26 15:52:17 +00:00
ChangeLog * update to libtool 1.3.3 1999-07-22 12:18:42 +00:00
configure.ac ucm: Add ucm files for DB820c board 2019-01-29 14:33:17 +01:00
COPYING Change FSF address (Franklin Street) 2017-11-14 14:29:26 +01:00
gitcompile a set of fixes to reduce gcc warnings 2018-03-27 15:16:41 +02:00
INSTALL pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
Makefile.am autotools: update style 2014-02-26 08:16:22 +01:00
MEMORY-LEAK Initial version 2003-02-04 14:56:07 +00:00
NOTES Change assert condition in error message handler 2007-10-24 12:53:08 +02:00
README.md README.md: add link to www.alsa-project.org 2018-10-24 17:33:10 +02:00
TODO Added snd_config_load_override(). 2002-01-09 21:28:15 +00:00

README.md

alsa-lib

Advanced Linux Sound Architecture (ALSA) project

The alsa-lib is a library to interface with ALSA in the Linux kernel and virtual devices using a plugin system.

The up-to-date reference generated from sources can be accessed here:

http://www.alsa-project.org/alsa-doc/alsa-lib/

You may give a look for more information about the ALSA project to URL http://www.alsa-project.org.