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# New Ticket Created by
# Please include the string: [perl #132996]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/Ticket/Display.html?id=132996 >
I just realized that I used the wrong perlbug. But as I can't seem to
get the correct perlbug to run I'll just have to give yout the most
important facts manually:
Configure command:
./Configure -des -Dusedevel -Dcc=clang -Dcxx=clang++ -Dld=clang++
-Aldflags=-fsanitize=address -Accflags=-g3\ -fsanitize=address
-Acxxflags=-g3\ -fsanitize=address
Perl version:
perl 5, version 27, subversion 10 built for x86_64-linux
Platform:
Linux Debian 4.9.65-3 x86_64 GNU/Linux
Tell me if you need anything else.
In-Reply-To: <5.26.1_42062_1521280686@debian-vm.localdomain>
On Sat, Mar 17, 2018 at 11:32:37AM +0100, jeremy@feusi.co wrote:
>
> Reply-To: jeremy@feusi.co
>
>
> This is a bug report for perl from jeremy@feusi.co,
> generated with the help of perlbug 1.40 running under perl 5.26.1.
>
>
> -----------------------------------------------------------------
> Perl segfaults when executing the attached program (perl <progname>) due to a null pointer dereference in Perl_pp_multiconcat.
> This bug can also reproduced on archlinux and debian with standard installation configuration and version 5.26.1.
>
> Detailed backtrace:
>
> ASAN:DEADLYSIGNAL
> =================================================================
> ==9327==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000000c (pc 0x00000084e5f2 bp 0x7ffeed336030 sp 0x7ffeed335a40 T0)
> ==9327==The signal is caused by a READ memory access.
> ==9327==Hint: address points to the zero page.
> #0 0x84e5f1 in Perl_pp_multiconcat /home/jfe/perl52/pp_hot.c
> #1 0x8488be in Perl_runops_standard /home/jfe/perl52/run.c:41:26
> #2 0xa95bf6 in S_regmatch /home/jfe/perl52/regexec.c:7424:3
> #3 0xa74ea0 in S_regtry /home/jfe/perl52/regexec.c:4086:14
> #4 0xa57204 in Perl_regexec_flags /home/jfe/perl52/regexec.c:3943:7
> #5 0x877ab1 in Perl_pp_subst /home/jfe/perl52/pp_hot.c:4212:10
> #6 0x8488be in Perl_runops_standard /home/jfe/perl52/run.c:41:26
> #7 0x5dbc91 in S_run_body /home/jfe/perl52/perl.c
> #8 0x5dabb4 in perl_run /home/jfe/perl52/perl.c:2646:2
> #9 0x52f0b8 in main /home/jfe/perl52/perlmain.c:122:9
> #10 0x7fe328886f29 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20f29)
> #11 0x43f999 in _start (/home/jfe/perl52/perl+0x43f999)
>
> AddressSanitizer can not provide additional info.
> SUMMARY: AddressSanitizer: SEGV /home/jfe/perl52/pp_hot.c in Perl_pp_multiconcat
> ==9327==ABORTING
>
> This bug was found with honggfuzz and asan.
>
>
> [Please do not change anything below this line]
> -----------------------------------------------------------------
> ---
> Flags:
> category=core
> severity=high
> ---
> Site configuration information for perl 5.26.1:
>
> Configured by Debian at Fri Jan 12 19:31:09 UTC 2018.
>
> Summary of my perl5 (revision 5 version 26 subversion 1) configuration:
>
> Platform:
> osname=linux
> osvers=4.9.0
> archname=x86_64-linux-gnu-thread-multi
> uname='linux localhost 4.9.0 #1 smp debian 4.9.0 x86_64 gnulinux '
> config_args='-Dusethreads -Duselargefiles -Dcc=x86_64-linux-gnu-gcc -Dcpp=x86_64-linux-gnu-cpp -Dld=x86_64-linux-gnu-gcc -Dccflags=-DDEBIAN -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/build/perl-awpeXx/perl-5.26.1=. -fstack-protector-strong -Wformat -Werror=format-security -Dldflags= -Wl,-z,relro -Dlddlflags=-shared -Wl,-z,relro -Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.26 -Darchlib=/usr/lib/x86_64-linux-gnu/perl/5.26 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/x86_64-linux-gnu/perl5/5.26 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.26.1 -Dsitearch=/usr/local/lib/x86_64-linux-gnu/perl/5.26.1 -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 -Ui_xlocale -Uversiononly -DDEBUGGING=-g -Doptimize=-O2 -dEs -Duseshrplib -Dlibperl=libperl.so.5.26.1'
> hint=recommended
> useposix=true
> d_sigaction=define
> useithreads=define
> usemultiplicity=define
> use64bitint=define
> use64bitall=define
> uselongdouble=undef
> usemymalloc=n
> default_inc_excludes_dot=define
> bincompat5005=undef
> Compiler:
> cc='x86_64-linux-gnu-gcc'
> 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='7.2.0'
> gccosandvers=''
> intsize=4
> longsize=8
> ptrsize=8
> doublesize=8
> byteorder=12345678
> doublekind=3
> d_longlong=define
> longlongsize=8
> d_longdbl=define
> longdblsize=16
> longdblkind=3
> ivtype='long'
> ivsize=8
> nvtype='double'
> nvsize=8
> Off_t='off_t'
> lseeksize=8
> alignbytes=8
> prototype=define
> Linker and Libraries:
> ld='x86_64-linux-gnu-gcc'
> ldflags =' -fstack-protector-strong -L/usr/local/lib'
> libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/7/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-2.26.so
> so=so
> useshrplib=true
> libperl=libperl.so.5.26
> gnulibc_version='2.26'
> Dynamic Linking:
> dlsrc=dl_dlopen.xs
> dlext=so
> d_dlsymun=undef
> ccdlflags='-Wl,-E'
> cccdlflags='-fPIC'
> lddlflags='-shared -L/usr/local/lib -fstack-protector-strong'
>
> Locally applied patches:
> DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS default for modules installed from CPAN.
> DEBPKG:debian/db_file_ver - https://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 - https://bugs.debian.org/290336 Tweak enc2xs to follow symlinks and ignore missing @INC directories.
> DEBPKG:debian/errno_ver - https://bugs.debian.org/343351 Remove Errno version check due to upgrade problems with long-running processes.
> DEBPKG:debian/libperl_embed_doc - https://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/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/perlivp - https://bugs.debian.org/510895 Make perlivp skip include directories in /usr/local
> DEBPKG:debian/deprecate-with-apt - https://bugs.debian.org/747628 Point users to Debian packages of deprecated core modules
> DEBPKG:debian/squelch-locale-warnings - https://bugs.debian.org/508764 Squelch locale warnings in Debian package maintainer scripts
> DEBPKG:debian/patchlevel - https://bugs.debian.org/567489 List packaged patches for 5.26.1-4 in patchlevel.h
> DEBPKG:fixes/document_makemaker_ccflags - https://bugs.debian.org/628522 [rt.cpan.org #68613] Document that CCFLAGS should include $Config{ccflags}
> DEBPKG:debian/find_html2text - https://bugs.debian.org/640479 Configure CPAN::Distribution with correct name of html2text
> DEBPKG:debian/perl5db-x-terminal-emulator.patch - https://bugs.debian.org/668490 Invoke x-terminal-emulator rather than xterm in perl5db.pl
> DEBPKG:debian/cpan-missing-site-dirs - https://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] https://bugs.debian.org/587650 Memoize::Storable: respect 'nstore' option not respected
> DEBPKG:debian/makemaker-pasthru - https://bugs.debian.org/758471 Pass LD settings through to subdirectories
> DEBPKG:debian/makemaker-manext - https://bugs.debian.org/247370 Make EU::MakeMaker honour MANnEXT settings in generated manpage headers
> DEBPKG:debian/kfreebsd-softupdates - https://bugs.debian.org/796798 Work around Debian Bug#796798
> DEBPKG:fixes/autodie-scope - https://bugs.debian.org/798096 Fix a scoping issue with "no autodie" and the "system" sub
> DEBPKG:fixes/memoize-pod - [rt.cpan.org #89441] Fix POD errors in Memoize
> DEBPKG:debian/hurd-softupdates - https://bugs.debian.org/822735 Fix t/op/stat.t failures on hurd
> DEBPKG:fixes/math_complex_doc_great_circle - https://bugs.debian.org/697567 [rt.cpan.org #114104] Math::Trig: clarify definition of great_circle_midpoint
> DEBPKG:fixes/math_complex_doc_see_also - https://bugs.debian.org/697568 [rt.cpan.org #114105] Math::Trig: add missing SEE ALSO
> DEBPKG:fixes/math_complex_doc_angle_units - https://bugs.debian.org/731505 [rt.cpan.org #114106] Math::Trig: document angle units
> DEBPKG:fixes/cpan_web_link - https://bugs.debian.org/367291 CPAN: Add link to main CPAN web site
> DEBPKG:fixes/time_piece_doc - https://bugs.debian.org/817925 Time::Piece: Improve documentation for add_months and add_years
> DEBPKG:fixes/extutils_makemaker_reproducible - https://bugs.debian.org/835815 https://bugs.debian.org/834190 Make perllocal.pod files reproducible
> DEBPKG:fixes/file_path_hurd_errno - File-Path: Fix test failure in Hurd due to hard-coded ENOENT
> DEBPKG:debian/hppa_op_optimize_workaround - https://bugs.debian.org/838613 Temporarily lower the optimization of op.c on hppa due to gcc-6 problems
> DEBPKG:debian/installman-utf8 - https://bugs.debian.org/840211 Generate man pages with UTF-8 characters
> DEBPKG:fixes/file_path_chmod_race - https://bugs.debian.org/863870 [rt.cpan.org #121951] Prevent directory chmod race attack.
> DEBPKG:fixes/extutils_file_path_compat - Correct the order of tests of chmod(). (#294)
> DEBPKG:fixes/getopt-long-2 - [rt.cpan.org #120300] Withdraw part of commit 5d9947fb445327c7299d8beb009d609bc70066c0, which tries to implement more GNU getopt_long campatibility. GNU
> DEBPKG:fixes/getopt-long-3 - provide a default value for optional arguments
> DEBPKG:fixes/getopt-long-4 - https://bugs.debian.org/864544 [rt.cpan.org #122068] Fix issue #122068.
> DEBPKG:fixes/test-builder-reset - https://bugs.debian.org/865894 Reset inside subtest maintains parent
> DEBPKG:debian/hppa_opmini_optimize_workaround - https://bugs.debian.org/869122 Lower the optimization level of opmini.c on hppa
> DEBPKG:debian/sh4_op_optimize_workaround - https://bugs.debian.org/869373 Also lower the optimization level of op.c and opmini.c on sh4
> DEBPKG:fixes/json-pp-example - [rt.cpan.org #92793] https://bugs.debian.org/871837 fix RT-92793: bug in SYNOPSIS
> DEBPKG:debian/perldoc-pager - https://bugs.debian.org/870340 [rt.cpan.org #120229] Fix perldoc terminal escapes when sensible-pager is less
> DEBPKG:debian/prune_libs - https://bugs.debian.org/128355 Prune the list of libraries wanted to what we actually need.
> DEBPKG:debian/configure-regen - https://bugs.debian.org/762638 Regenerate Configure et al. after probe unit changes
> DEBPKG:fixes/rename-filexp.U-phase1 - regen-configure: rename filexp.U to filexp_path.U, phase 1
> DEBPKG:fixes/rename-filexp.U-phase2 - regen-configure: rename filexp.U to filexp_path.U, phase 2
> DEBPKG:fixes/packaging_test_skips - Skip various tests if PERL_BUILD_PACKAGING is set
> DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
> DEBPKG:fixes/encode-alias-regexp - https://bugs.debian.org/880085 fix https://github.com/dankogai/p5-encode/issues/127
>
> ---
> @INC for perl 5.26.1:
> /etc/perl
> /usr/local/lib/x86_64-linux-gnu/perl/5.26.1
> /usr/local/share/perl/5.26.1
> /usr/lib/x86_64-linux-gnu/perl5/5.26
> /usr/share/perl5
> /usr/lib/x86_64-linux-gnu/perl/5.26
> /usr/share/perl/5.26
> /usr/local/lib/site_perl
> /usr/lib/x86_64-linux-gnu/perl-base
>
> ---
> Environment for perl 5.26.1:
> HOME=/home/jfe
> LANG=en_US.UTF-8
> LANGUAGE=en_US.UTF-8
> LC_ADDRESS=de_CH.UTF-8
> LC_ALL=en_US.UTF-8
> LC_COLLATE=de_CH.UTF-8
> LC_IDENTIFICATION=de_CH.UTF-8
> LC_MEASUREMENT=de_CH.UTF-8
> LC_MESSAGES=en_US.UTF-8
> LC_MONETARY=de_CH.UTF-8
> LC_NAME=de_CH.UTF-8
> LC_NUMERIC=de_CH.UTF-8
> LC_PAPER=de_CH.UTF-8
> LC_TELEPHONE=de_CH.UTF-8
> LC_TIME=en_DK.UTF-8
> LD_LIBRARY_PATH (unset)
> LOGDIR (unset)
> PATH=/home/jfe/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
> PERL_BADLANG (unset)
> SHELL=/bin/bash
> #!./perl
> m/(?{print <<EOF
> A$A
> EOF
> })/g;
> eval 's/${\%A}{3}//e';
>
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