Re: Segfaulting perl

Wed, 18 Oct 2006 11:34:22 -0700 

For the archives:
I eventually found <http://www.talkaboutprogramming.com/group/ perl.libwww/messages/1556.html> and <http://lists.alioth.debian.org/ pipermail/pkg-openssl-devel/2005-October/000186.html>. It looks like a bug in p5-Crypt-SSLeay, and it not properly calling some OpenSSL routines, which causes perl to segfault. In fetchyahoo 2.10.6, it is on line 1435 of 2117, which reads: 
        $main_page = $ua->request($request);
$ua is a LWP::UserAgent object, and what's happening is that the request is redirecting to an SSL page, so even if you have SSL turned off it will end up making an SSL request.
I fixed it (very temporarily) by removing p5-Crypt-SSLeay (pkg_delete -f p5-Crypt-SSLeay). The UserAgent object sees that it can't do SSL without that package and follows the redirects but without SSL.
So obviously there is the drawback that SSL won't work, and also I have other packages that rely on that perl module (notably gnucash) that won't work with it not installed. That bug was filed with Debian a year ago (Bug#334938, Oct 20, 2005 <http://bugs.debian.org/cgi-bin/ bugreport.cgi?bug=334938>). 


On 15 Oct 2006, at 13:10, David King wrote:
Just to make sure that no bad library dependancies were at work, I did a 'make buildworld installworld', and a 'portupgrade -frR fetchyahoo perl openssl', to no avail (and with the same backtrace generated by gdb as below). 

Any ideas?

On 10 Oct 2006, at 11:05, David King wrote:
When trying to run fetchyahoo (from ports), perl dumps core. It appears to be dumping core in OpenSSL. I've tried recompiling/ reinstalling all ports related to fetchyahoo, perl, and openssl. This happens whether or not I enable SSL in fetchyahoo's configuration. 

It gets as far as:

~% fetchyahoo
Logging in insecurely via plaintext as username on Tue Oct 10 09:49:20 2006 
zsh: segmentation fault (core dumped)  fetchyahoo

Perl and OpenSSL have been compiled with:

~% egrep -i '^(COPT|CFLAG)' /etc/make.conf
CFLAGS+=-O -pipe -mtune=i686 -g
COPTFLAGS=-O -pipe -mtune=i686 -g

Here's the output of GDB and a backtrace

Core was generated by `perl5.8.8'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/local/lib/perl5/5.8.8/mach/CORE/ libperl.so...done. 
Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/CORE/libperl.so
Reading symbols from /lib/libm.so.4...done.
Loaded symbols for /lib/libm.so.4
Reading symbols from /lib/libcrypt.so.3...done.
Loaded symbols for /lib/libcrypt.so.3
Reading symbols from /lib/libutil.so.5...done.
Loaded symbols for /lib/libutil.so.5
Reading symbols from /usr/lib/libpthread.so.2...done.
Loaded symbols for /usr/lib/libpthread.so.2
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/local/lib/perl5/5.8.8/mach/auto/IO/ IO.so...done. 
Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/auto/IO/IO.so
Reading symbols from /usr/local/lib/perl5/5.8.8/mach/auto/Fcntl/ Fcntl.so...done. Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/auto/Fcntl/ Fcntl.so Reading symbols from /usr/local/lib/perl5/site_perl/5.8.8/mach/ auto/MIME/Base64/Base64.so...done. Loaded symbols for /usr/local/lib/perl5/site_perl/5.8.8/mach/auto/ MIME/Base64/Base64.so Reading symbols from /usr/local/lib/perl5/5.8.8/mach/auto/Time/ HiRes/HiRes.so...done. Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/auto/Time/HiRes/ HiRes.so Reading symbols from /usr/local/lib/perl5/5.8.8/mach/auto/Socket/ Socket.so...done. Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/auto/Socket/ Socket.so Reading symbols from /usr/local/lib/perl5/5.8.8/mach/auto/Sys/ Hostname/Hostname.so...done. Loaded symbols for /usr/local/lib/perl5/5.8.8/mach/auto/Sys/ Hostname/Hostname.so Reading symbols from /usr/local/lib/perl5/site_perl/5.8.8/mach/ auto/Compress/Zlib/Zlib.so...done. Loaded symbols for /usr/local/lib/perl5/site_perl/5.8.8/mach/auto/ Compress/Zlib/Zlib.so 
Reading symbols from /lib/libz.so.3...done.
Loaded symbols for /lib/libz.so.3
Reading symbols from /usr/local/lib/perl5/site_perl/5.8.8/mach/ auto/HTML/Parser/Parser.so...done. Loaded symbols for /usr/local/lib/perl5/site_perl/5.8.8/mach/auto/ HTML/Parser/Parser.so Reading symbols from /usr/local/lib/perl5/site_perl/5.8.8/mach/ auto/Crypt/SSLeay/SSLeay.so...done. Loaded symbols for /usr/local/lib/perl5/site_perl/5.8.8/mach/auto/ Crypt/SSLeay/SSLeay.so 
Reading symbols from /usr/local/lib/libssl.so.5...done.
Loaded symbols for /usr/local/lib/libssl.so.5
Reading symbols from /usr/local/lib/libcrypto.so.5...done.
Loaded symbols for /usr/local/lib/libcrypto.so.5
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x2839d420 in SSL_CTX_ctrl () from /usr/local/lib/libssl.so.5
[New LWP 100179]
(gdb) bt
#0  0x2839d420 in SSL_CTX_ctrl () from /usr/local/lib/libssl.so.5
#1  0x000001c0 in ?? ()
#2  0x0000000d in ?? ()
#3  0x28325000 in ?? ()
#4  0x00000000 in ?? ()
#5 0x283683b4 in __JCR_LIST__ () from /usr/local/lib/perl5/ site_perl/5.8.8/mach/auto/Crypt/SSLeay/SSLeay.so 
#6  0x00000017 in ?? ()
#7  0x00000000 in ?? ()
#8 0x283608af in XS_Crypt__SSLeay__CTX_new (my_perl=0x8058000, cv=0x86b47b0) at SSLeay.xs:133 #9 0x2810fd9f in Perl_pp_entersub (my_perl=0x8058000) at pp_hot.c: 2913 #10 0x280f22d9 in Perl_runops_debug (my_perl=0x8058000) at dump.c: 1459 #11 0x2809e6b1 in S_run_body (my_perl=0x8058000, oldscope=4095) at perl.c:2366 
#12 0x2809e222 in perl_run (my_perl=0x8058000) at perl.c:2283
#13 0x080492bc in main ()
Summary of my perl5 (revision 5 version 8 subversion 8) configuration: 
  Platform:
osname=freebsd, osvers=6.1-release-p10, archname=i386-freebsd- thread-multi-64int uname='freebsd melchoir.ketralnis.com 6.1-release-p10 freebsd 6.1-release-p10 #5: mon oct 9 09:44:49 pdt 2006 [EMAIL PROTECTED]:usrobjusrsrcsysmelchoir i386 ' config_args='-sde -Dprefix=/usr/local -Darchlib=/usr/local/lib/ perl5/5.8.8/mach -Dprivlib=/usr/local/lib/perl5/5.8.8 -Dman3dir=/ usr/local/lib/perl5/5.8.8/perl/man/man3 -Dman1dir=/usr/local/man/ man1 -Dsitearch=/usr/local/lib/perl5/site_perl/5.8.8/mach - Dsitelib=/usr/local/lib/perl5/site_perl/5.8.8 -Dscriptdir=/usr/ local/bin -Dsiteman3dir=/usr/local/lib/perl5/5.8.8/man/man3 - Dsiteman1dir=/usr/local/man/man1 -Ui_malloc -Ui_iconv - Uinstallusrbinperl -Dcc=cc -Duseshrplib -Dccflags=-DAPPLLIB_EXP="/ usr/local/lib/perl5/5.8.8/BSDPAN" -Doptimize=-O2 -fno-strict- aliasing -pipe -O -pipe -mtune=i686 -g -march=pentiumpro - Ud_dosuid -Ui_gdbm -Dusethreads=y -Dusemymalloc=n -Duse64bitint' 
    hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define usemultiplicity=define 
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=define use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
cc='cc', ccflags ='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.8.8/ BSDPAN" -DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno- strict-aliasing -pipe -Wdeclaration-after-statement -I/usr/local/ include', optimize='-O2 -fno-strict-aliasing -pipe -O -pipe -mtune=i686 - g -march=pentiumpro', cppflags='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.8.8/BSDPAN" - DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-strict- aliasing -pipe -Wdeclaration-after-statement -I/usr/local/include' ccversion='', gccversion='3.4.4 [FreeBSD] 20050518', gccosandvers='' intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12 ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags ='-pthread -Wl,-E -L/usr/local/lib'
    libpth=/usr/lib /usr/local/lib
    libs=-lgdbm -lm -lcrypt -lutil
    perllibs=-lm -lcrypt -lutil
    libc=, so=so, useshrplib=true, libperl=libperl.so
    gnulibc_version=''
  Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' - Wl,-R/usr/local/lib/perl5/5.8.8/mach/CORE' 
    cccdlflags='-DPIC -fPIC', lddlflags='-shared  -L/usr/local/lib'


Characteristics of this binary (from libperl):
  Compile-time options: DEBUGGING MULTIPLICITY PERL_IMPLICIT_CONTEXT
                        PERL_MALLOC_WRAP USE_64_BIT_INT USE_ITHREADS
                        USE_LARGE_FILES USE_PERLIO USE_REENTRANT_API
  Locally applied patches:
        defined-or
  Built under freebsd
  Compiled at Oct 10 2006 08:02:48
  @INC:
    /usr/local/lib/perl5/5.8.8/BSDPAN
    /usr/local/lib/perl5/site_perl/5.8.8/mach
    /usr/local/lib/perl5/site_perl/5.8.8
    /usr/local/lib/perl5/site_perl/5.8.7
    /usr/local/lib/perl5/site_perl/5.8.6
    /usr/local/lib/perl5/site_perl/5.8.5
    /usr/local/lib/perl5/site_perl/5.6.1
    /usr/local/lib/perl5/site_perl
    /usr/local/lib/perl5/5.8.8/mach
    /usr/local/lib/perl5/5.8.8
    .


Any ideas?
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--
David King
Computer Programmer
Ketralnis Systems


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--
David King
Computer Programmer
Ketralnis Systems


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