Re: $[ causes segfault with mod_perl 2.0.9, apache 2.4.10
"Randolf Richardson" <[email protected]>
| Newsgroups | gmane.comp.apache.mod-perl |
|---|---|
| Organization | Inter-Corporate Computer & Network Services |
| Message-ID | <[email protected]> |
> Hello,
>
> simply adding <Perl> $[ </Perl>
> to /etc/apache2/apache2.conf (or PerlPostConfigRequire a file
> containing $[) causes apache to segfault (trace below).
>
> Strangely this happens _only_ if mod_php is also loaded!
Is PHP acting like a Poltergeist? (Sorry, I couldn't resist.)
> No sane person cares about $[,
Its use is also discouraged according to the documentation:
"As of release 5 of Perl, assignment to $[ is treated as a compiler
directive, and cannot influence the behavior of any other file.
(That's why you can only assign compile-time constants to it.) Its
use is highly discouraged."
Source: http://perldoc.perl.org/perlvar.html
> but it's not uncommon to
> PerlPostConfigRequire some old module using it, and it took me a few
> hours to figure out what's happening after upgrading to ubuntu 15.04.
That's one good reason for not segfaulting. =)
[End of reply.]
> Tested in a clean ubuntu 15.04 installation:
> apache 2.4.10
> perl 5.20.2
> mod_perl 2.0.9~1624218
> mod_php 5.6.4
>
> Cheers,
> Kostas
>
>
>
> 2. Used Components and their Configuration:
>
> *** mod_perl version 2.000009
>
> *** using /usr/lib/x86_64-linux-gnu/perl5/5.20/Apache2/BuildConfig.pm
>
> *** Makefile.PL options:
> MP_APR_CONFIG => /usr/bin/apr-config
> MP_APR_LIB => aprext
> MP_APXS => /usr/bin/apxs
> MP_CCOPTS => -g -O2 -fstack-protector-strong -Wformat
> -Werror=format-security -Wall
> MP_COMPAT_1X => 1
> MP_GENERATE_XS => 1
> MP_LIBNAME => mod_perl
> MP_TRACE => 0
> MP_USE_DSO => 1
> MP_USE_STATIC => 0
>
>
> *** The httpd binary was not found
>
>
> *** (apr|apu)-config linking info
>
> (apr|apu)-config scripts were not found
>
>
>
> *** /usr/bin/perl -V
> Summary of my perl5 (revision 5 version 20 subversion 2) configuration:
>
> Platform:
> osname=linux, osvers=3.2.0-58-generic,
> archname=x86_64-linux-gnu-thread-multi
> uname='linux kissel 3.2.0-58-generic #88-ubuntu smp tue dec 3
> 17:37:58 utc 2013 x86_64 x86_64 x86_64 gnulinux '
> config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
> -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat
> -Werror=format-security -Dldflags= -Wl,-Bsymbolic-functions
> -Wl,-z,relro -Dlddlflags=-shared -Wl,-Bsymbolic-functions -Wl,-z,relro
> -Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
> -Dprivlib=/usr/share/perl/5.20
> -Darchlib=/usr/lib/x86_64-linux-gnu/perl/5.20 -Dvendorprefix=/usr
> -Dvendorlib=/usr/share/perl5
> -Dvendorarch=/usr/lib/x86_64-linux-gnu/perl5/5.20
> -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.20.2
> -Dsitearch=/usr/local/lib/x86_64-linux-gnu/perl/5.20.2
> -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3
> -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3
> -Duse64bitint -Dman1ext=1 -Dman3ext=3perl
> -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio
> -Uusenm -Ui_libutil -Uversiononly -DDEBUGGING=-g -Doptimize=-O2
> -Duseshrplib -Dlibperl=libperl.so.5.20.2 -des'
> hint=recommended, useposix=true, d_sigaction=define
> useithreads=define, usemultiplicity=define
> use64bitint=define, use64bitall=define, uselongdouble=undef
> usemymalloc=n, bincompat5005=undef
> Compiler:
> cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv
> -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE
> -D_FILE_OFFSET_BITS=64',
> optimize='-O2 -g',
> cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv
> -fno-strict-aliasing -pipe -I/usr/local/include'
> ccversion='', gccversion='4.9.2', gccosandvers=''
> intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
> d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
> ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
> lseeksize=8
> alignbytes=8, prototype=define
> Linker and Libraries:
> ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
> libpth=/usr/local/lib
> /usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed
> /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu
> /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib
> libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
> perllibs=-ldl -lm -lpthread -lc -lcrypt
> libc=libc-2.19.so, so=so, useshrplib=true, libperl=libperl.so.5.20
> gnulibc_version='2.19'
> Dynamic Linking:
> dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
> cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib -fstack-protector'
>
>
> Characteristics of this binary (from libperl):
> Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
> PERL_DONT_CREATE_GVSV
> PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
> PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
> PERL_NEW_COPY_ON_WRITE PERL_PRESERVE_IVUV
> USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS
> USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE
> USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_PERLIO
> USE_PERL_ATOF USE_REENTRANT_API
> Locally applied patches:
> DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS
> default for modules installed from CPAN.
> DEBPKG:debian/db_file_ver - http://bugs.debian.org/340047 Remove
> overly restrictive DB_File version check.
> DEBPKG:debian/doc_info - Replace generic man(1) instructions with
> Debian-specific information.
> DEBPKG:debian/enc2xs_inc - http://bugs.debian.org/290336 Tweak
> enc2xs to follow symlinks and ignore missing @INC directories.
> DEBPKG:debian/errno_ver - http://bugs.debian.org/343351 Remove
> Errno version check due to upgrade problems with long-running
> processes.
> DEBPKG:debian/libperl_embed_doc - http://bugs.debian.org/186778
> Note that libperl-dev package is required for embedded linking
> DEBPKG:fixes/respect_umask - Respect umask during installation
> DEBPKG:debian/writable_site_dirs - Set umask approproately for
> site install directories
> DEBPKG:debian/extutils_set_libperl_path - EU:MM: set location of
> libperl.a under /usr/lib
> DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or
> perllocal.pod for perl or vendor
> DEBPKG:debian/prefix_changes - Fiddle with *PREFIX and variables
> written to the makefile
> DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to
> the binary targets.
> DEBPKG:debian/instmodsh_doc - Debian policy doesn't install
> .packlist files for core or vendor.
> DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH
> as per Debian policy.
> DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to
> /etc/perl/Net as /usr may not be writable.
> DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
> DEBPKG:debian/module_build_man_extensions -
> http://bugs.debian.org/479460 Adjust Module::Build manual page
> extensions for the Debian Perl policy
> DEBPKG:debian/prune_libs - http://bugs.debian.org/128355 Prune the
> list of libraries wanted to what we actually need.
> DEBPKG:fixes/net_smtp_docs - [rt.cpan.org #36038]
> http://bugs.debian.org/100195 Document the Net::SMTP 'Port' option
> DEBPKG:debian/perlivp - http://bugs.debian.org/510895 Make perlivp
> skip include directories in /usr/local
> DEBPKG:debian/deprecate-with-apt - http://bugs.debian.org/747628
> Point users to Debian packages of deprecated core modules
> DEBPKG:debian/squelch-locale-warnings -
> http://bugs.debian.org/508764 Squelch locale warnings in Debian
> package maintainer scripts
> DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the
> upstream Git repository
> DEBPKG:debian/patchlevel - http://bugs.debian.org/567489 List
> packaged patches for 5.20.2-2 in patchlevel.h
> DEBPKG:debian/skip-kfreebsd-crash - http://bugs.debian.org/628493
> [perl #96272] Skip a crashing test case in t/op/threads.t on
> GNU/kFreeBSD
> DEBPKG:fixes/document_makemaker_ccflags -
> http://bugs.debian.org/628522 [rt.cpan.org #68613] Document that
> CCFLAGS should include $Config{ccflags}
> DEBPKG:debian/find_html2text - http://bugs.debian.org/640479
> Configure CPAN::Distribution with correct name of html2text
> DEBPKG:debian/perl5db-x-terminal-emulator.patch -
> http://bugs.debian.org/668490 Invoke x-terminal-emulator rather than
> xterm in perl5db.pl
> DEBPKG:debian/cpan-missing-site-dirs -
> http://bugs.debian.org/688842 Fix CPAN::FirstTime defaults with
> nonexisting site dirs if a parent is writable
> DEBPKG:fixes/memoize_storable_nstore - [rt.cpan.org #77790]
> http://bugs.debian.org/587650 Memoize::Storable: respect 'nstore'
> option not respected
> DEBPKG:debian/regen-skip - Skip a regeneration check in unrelated
> git repositories
> DEBPKG:fixes/regcomp-mips-optim - [perl #122817]
> http://bugs.debian.org/754054 Downgrade the optimization of regcomp.c
> on mips and mipsel due to a gcc-4.9 bug
> DEBPKG:debian/makemaker-pasthru - http://bugs.debian.org/758471
> Pass LD settings through to subdirectories
> DEBPKG:fixes/perldoc-less-R - [rt.cpan.org #98636]
> http://bugs.debian.org/758689 Tell the 'less' pager to allow terminal
> escape sequences
> DEBPKG:fixes/pod_man_reproducible_date -
> http://bugs.debian.org/759405 Support POD_MAN_DATE in Pod::Man for the
> left-hand footer
> DEBPKG:fixes/io_uncompress_gunzip_inmemory -
> http://bugs.debian.org/747363 [rt.cpan.org #95494] Fix gunzip to
> in-memory file handle
> DEBPKG:fixes/socket_test_recv_fix - http://bugs.debian.org/758718
> [perl #122657] Compare recv return value to peername in socket test
> DEBPKG:fixes/hurd_socket_recv_todo - http://bugs.debian.org/758718
> [perl #122657] TODO checking the result of recv() on hurd
> DEBPKG:fixes/regexp-performance - [0fa70a0]
> http://bugs.debian.org/777556 [perl #123743] simpify and speed up
> /.*.../ handling
> Built under linux
> Compiled at Mar 3 2015 11:44:27
> %ENV:
> PERL_LWP_USE_HTTP_10="1"
> @INC:
> /etc/perl
> /usr/local/lib/x86_64-linux-gnu/perl/5.20.2
> /usr/local/share/perl/5.20.2
> /usr/lib/x86_64-linux-gnu/perl5/5.20
> /usr/share/perl5
> /usr/lib/x86_64-linux-gnu/perl/5.20
> /usr/share/perl/5.20
> /usr/local/lib/site_perl
> .
>
>
> 3. This is the core dump trace: (if you get a core dump):
>
> #0 0x00007f455212ce70 in ?? ()
> #1 0x00007f4557301a04 in Perl_newBINOP () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #2 0x00007f4557342cf1 in Perl_yyparse () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #3 0x00007f45573c5342 in ?? () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #4 0x00007f45573d0fa0 in Perl_pp_require () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #5 0x00007f455738bbb6 in Perl_runops_standard () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #6 0x00007f45573153a1 in Perl_eval_sv () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #7 0x00007f455769fa04 in modperl_require_module () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #8 0x00007f45576963e7 in ?? () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #9 0x00007f45573c20a9 in Perl_leave_scope () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #10 0x00007f455731b68a in perl_parse () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/x86_64-linux-gnu/libperl.so.5.20
> #11 0x00007f4557696ab3 in modperl_startup () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #12 0x00007f4557696a43 in modperl_startup () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #13 0x00007f4557696e76 in modperl_init () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #14 0x00007f4557696feb in modperl_hook_init () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #15 0x00007f455769a6f6 in modperl_cmd_perldo () from
> /tmp/apport_sandbox_l8WbDl/usr/lib/apache2/modules/mod_perl.so
> #16 0x00007f455b2cdd5e in invoke_cmd (cmd=0x7f45578c1570,
> parms=0x7fff96bf48d0, mconfig=0x7f455b20ac90, args=0x7f455b1d74d8
> "$[\n") at config.c:879
> #17 0x00007f455b2d045f in ap_walk_config_sub
> (section_vector=<optimized out>, parms=<optimized out>,
> current=<optimized out>) at config.c:1309
> #18 ap_walk_config (current=0x7f455b1d74e0, parms=0x7fff96bf48d0,
> section_vector=0x7f455b2334e8) at config.c:1342
> #19 0x00007f455b2d176d in ap_process_config_tree (s=0x7f455c2ea940,
> conftree=0x25, p=0x7f455b264028, ptemp=0x7f4557681c80 <PL_ppaddr>)
> at config.c:2059
> #20 0x00007f455b2ae143 in main (argc=2, argv=0x7fff96bf4b28) at main.c:739
>
>
> This report was generated by -e on Thu May 21 18:07:21 2015 GMT.
>
> -------------8<---------- End Bug Report --------------8<----------
Randolf Richardson - [email protected]
Inter-Corporate Computer & Network Services, Inc.
Beautiful British Columbia, Canada
http://www.inter-corporate.com/