Subject: sox: LADSPA plugins segfault Package: sox Version: 14.3.1-1+b1 Severity: normal Tags: patch
*** Please type your report below this line *** sox will segfault when trying to use the LADSPA effect with any plugin. An example command with the ‘cmt’ package installed: sox input.wav output.wav ladspa cmt delay_1s Produces the following backtrace: #0 0x00007ffff794183c in ?? () from /usr/lib/libltdl.so.7 #1 0x00007ffff7942c28 in ?? () from /usr/lib/libltdl.so.7 #2 0x00007ffff7941096 in ?? () from /usr/lib/libltdl.so.7 #3 0x00007ffff79424d3 in ?? () from /usr/lib/libltdl.so.7 #4 0x00007ffff7942af8 in lt_dlopenadvise () from /usr/lib/libltdl.so.7 #5 0x00007ffff7942bb9 in lt_dlopenext () from /usr/lib/libltdl.so.7 #6 0x00007ffff7b7bbc2 in ?? () from /usr/lib/libsox.so.1 #7 0x00007ffff7b70e4d in sox_effect_options () from /usr/lib/libsox.so.1 #8 0x0000000000407cce in ?? () #9 0x000000000040984c in ?? () #10 0x00007ffff5e27c8d in __libc_start_main () from /lib/libc.so.6 #11 0x0000000000402be9 in ?? () #12 0x00007fffffffe208 in ?? () #13 0x000000000000001c in ?? () #14 0x0000000000000008 in ?? () #15 0x00007fffffffe515 in ?? () #16 0x00007fffffffe522 in ?? () #17 0x00007fffffffe539 in ?? () #18 0x00007fffffffe556 in ?? () #19 0x00007fffffffe55b in ?? () #20 0x00007fffffffe55e in ?? () #21 0x00007fffffffe565 in ?? () #22 0x00007fffffffe569 in ?? () #23 0x0000000000000000 in ?? () A discussion¹ of this appeared on the SoX-users mailing list in July 2010, where member ‘bl4’ discovered sox was not calling the libltdl lt_dlinit function and provided a patch. I have applied the patch and sox no longer segfaults with LADSPA plugins. ¹http://sourceforge.net/mailarchive/message.php?msg_id=25680681 -- System Information: Debian Release: 6.0.5 APT prefers stable APT policy: (900, 'stable'), (500, 'stable-updates') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages sox depends on: ii libc6 2.11.3-3 Embedded GNU C Library: Shared lib ii libgomp1 4.4.5-8 GCC OpenMP (GOMP) support library ii libgsm1 1.0.13-3 Shared libraries for GSM speech co ii libltdl7 2.2.6b-2 A system independent dlopen wrappe ii libmagic1 5.04-5+squeeze2 File type determination library us ii libopencore-amrnb0 0.1.2-1 Adaptive Multi Rate speech codec - ii libopencore-amrwb0 0.1.2-1 Adaptive Multi-Rate - Wideband spe ii libpng12-0 1.2.44-1+squeeze4 PNG library - runtime ii libsndfile1 1.0.21-3+squeeze1 Library for reading/writing audio ii libsox-fmt-alsa 14.3.1-1+b1 SoX alsa format I/O library ii libsox-fmt-ao 14.3.1-1+b1 SoX Libao format I/O library ii libsox-fmt-base 14.3.1-1+b1 Minimal set of SoX format librarie ii libsox-fmt-oss 14.3.1-1+b1 SoX OSS format I/O library ii libsox-fmt-pulse 14.3.1-1+b1 SoX PulseAudio format I/O library ii libsox1b 14.3.1-1+b1 SoX library of audio effects and p ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime sox recommends no packages. Versions of packages sox suggests: ii libsox-fmt-all 14.3.1-1+b1 All SoX format libraries -- no debconf information -- Gerald Turner Email: gtur...@unzane.com JID: gtur...@unzane.com GPG: 0xFA8CD6D5 21D9 B2E8 7FE7 F19E 5F7D 4D0C 3FA0 810F FA8C D6D5
--- sox-14.3.1/src/ladspa.c.orig 2010-07-03 14:01:30.000000000 +0200
+++ sox-14.3.1/src/ladspa.c 2010-07-04 13:42:46.000000000 +0200
@@ -103,6 +103,7 @@
path = getenv("LADSPA_PATH");
if (path == NULL)
path = LADSPA_PATH;
+ lt_dlinit();
lt_dlsetsearchpath(path);
if ((l_st->lth = lt_dlopenext(l_st->name)) == NULL) {
lsx_fail("could not open LADSPA plugin %s", l_st->name);
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