Public bug reported:
When I run faad on amd64 with the command line "faad -b 2 -f 2 -q -w
AAC2AC3Temp.aac" (-b 2 indicating 24 bit output), I get a segmentation
fault in fwrite. The same command on the same data works fine in a 32
bit system.
The problem is due to the write_audio_24bit() function in
frontend/audio.c, which uses a long* pointer (ie which is 8 bytes on
amd64 but only 4 on x86):
static int write_audio_24bit(audio_file *aufile, void *sample_buffer,
unsigned int samples)
{
int ret;
unsigned int i;
long *sample_buffer24 = (long*)sample_buffer;
char *data = malloc(samples*aufile->bits_per_sample*sizeof(char)/8);
Changing the definition of sample_buffer24 to make it an int* fixes the
problem.
The function write_audio_32bit needs a similar change and stops the
segfault happening if you use "-b 3" for 32 bit samples. (There is also
similar code in aacDECdrop/audio.c but I'm not sure where that is used.)
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: faad 2.7-4
Uname: Linux 2.6.36-iwlwifi-unify-scan x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
CheckboxSubmission: 1bd8e90541d49b96c13cbfcc9baf103b
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Sun Oct 24 15:21:17 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
ProcEnviron:
LANG=en_AU.utf8
SHELL=/bin/bash
SourcePackage: faad2
** Affects: faad2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug maverick
--
faad segfaults on amd64 due to incorrect pointer size
https://bugs.launchpad.net/bugs/665802
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