Found !
* A52 plugin allocates an input buffer at pcm_a52.c:556:
if (av_samples_alloc(rec->frame->data, rec->frame->linesize,
io->channels, rec->avctx->frame_size,
rec->avctx->sample_fmt, 0) < 0)
* The last parameter which equals 0 is "align":
http://libav.org/doxygen/master/samplefmt_8h.html#a4db4c77f928d32c7d8854732f50b8c04
* The problem is in libavutil::av_samples_get_buffer_size(). The parameter
"align" is not checked if it equals 0. And the following crash, division by 0
if (nb_channels > INT_MAX / align ||
* I suggest the following patch, based on FFMpeg source code:
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavutil/samplefmt.c;h=08ecc834678eced8c3029095a824d8ae9d29406a;hb=HEAD#l137
* I tested it on Ubuntu 13.10 64 bit and it works :-)
---------------------------
Libav patch
---------------------------
--- libavutil/samplefmt_origine.c 2013-05-12 09:08:17.000000000 +0200
+++ libavutil/samplefmt.c 2014-01-21 20:04:45.272527345 +0100
@@ -104,6 +104,12 @@
if (!sample_size || nb_samples <= 0 || nb_channels <= 0)
return AVERROR(EINVAL);
+ /* auto-select alignment if not specified */
+ if (!align) {
+ align = 1;
+ nb_samples = FFALIGN(nb_samples, 32);
+ }
+
/* check for integer overflow */
if (nb_channels > INT_MAX / align ||
(int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels))
/ sample_size)
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-plugins in Ubuntu.
https://bugs.launchpad.net/bugs/1241439
Title:
[a52 plugin] no sound/audio, traps: pulseaudio[25921] trap divide
error ip:7fe46a303a57 sp:7fff825b91d0 error:0 in libavutil.so.51.22.1
Status in “alsa-plugins” package in Ubuntu:
Confirmed
Bug description:
upgraded to 13.10 64 bit
no sound at all
aplay lists the devices
syslog is full of repeating messages:
desktop kernel: [ 891.907148] traps: pulseaudio[19742] trap divide error
ip:7fde05efca57 sp:7fff94bff400 error:0 in
libavutil.so.51.22.1[7fde05ee9000+1c000]
Oct 18 00:57:11 desktop pulseaudio[19746]: [pulseaudio] pid.c: Stale PID
file, overwriting.
Oct 18 00:57:11 desktop pulseaudio[19743]: [pulseaudio] main.c: Daemon
startup failed.
had to turn off respawning in client.conf
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: pulseaudio 1:4.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p',
'/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D0c',
'/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D2c',
'/dev/snd/pcmC0D2p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Fri Oct 18 11:47:26 2013
InstallationDate: Installed on 2013-04-30 (170 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to saucy on 2013-10-17 (0 days ago)
dmi.bios.date: 08/21/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F11
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: H77-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF11:bd08/21/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH77-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
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