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[perl #112874] Heap corrupted by regex involving (?| ... ) and ($0)
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From:
Jim Avera
Date:
May 13, 2012 01:06
Subject:
[perl #112874] Heap corrupted by regex involving (?| ... ) and ($0)
Message ID:
rt-3.6.HEAD-4610-1336777334-923.112874-75-0@perl.org
# New Ticket Created by Jim Avera
# Please include the string: [perl #112874]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=112874 >
This is a bug report for perl from james_avera@yahoo.com,
generated with the help of perlbug 1.39 running under perl 5.12.4.
-----------------------------------------------------------------
The following Perl program causes a fatal error in glibc indicating
that the heap is probably corrupted. The error messages are written
directly to the terminal (probably /dev/tty), and does not appear on
either stdout or stderr.
#!/usr/bin/perl
use strict; use warnings;
$_ = 'aaa x=${ \$x } bbb a=@a=@{ \@a } ccc';
s{
([\$\@])
(?| # re-use $1, $2 etc in each alternation
([^\w\s\{])
| ( \{
(
(?> \\.
| [^\{\}\\]++
| \{ (?0) \}
)*
)
\}
)
)
}
{replacement}xgs;
Here is what appears on the /dev/tty (captured with 'script'):
*** glibc detected *** /usr/bin/perl: free(): invalid next size
(fast): 0x0000000001198890 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7a6e6)[0x7f6ca7fdf6e6]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7f6ca7fe39cc]
/usr/lib/libperl.so.5.12(Perl_regexec_flags+0x41c)[0x7f6ca8419e1c]
/usr/lib/libperl.so.5.12(Perl_pp_subst+0x939)[0x7f6ca83b42c9]
/usr/lib/libperl.so.5.12(Perl_runops_standard+0x20)[0x7f6ca83adc10]
/usr/lib/libperl.so.5.12(perl_run+0x35e)[0x7f6ca835782e]
/usr/bin/perl(main+0x149)[0x400d49]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7f6ca7f8630d]
/usr/bin/perl[0x400d81]
======= Memory map: ========
00400000-00402000 r-xp 00000000 08:15 1851
/usr/bin/perl
00601000-00602000 r--p 00001000 08:15 1851
/usr/bin/perl
00602000-00603000 rw-p 00002000 08:15 1851
/usr/bin/perl
0116c000-011cf000 rw-p 00000000 00:00 0
[heap]
7f6ca0000000-7f6ca0021000 rw-p 00000000 00:00 0
7f6ca0021000-7f6ca4000000 ---p 00000000 00:00 0
7f6ca6d88000-7f6ca6d9d000 r-xp 00000000 08:15 137088
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f6ca6d9d000-7f6ca6f9c000 ---p 00015000 08:15 137088
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f6ca6f9c000-7f6ca6f9d000 r--p 00014000 08:15 137088
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f6ca6f9d000-7f6ca6f9e000 rw-p 00015000 08:15 137088
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f6ca6f9e000-7f6ca7687000 r--p 00000000 08:15 7656
/usr/lib/locale/locale-archive
7f6ca7687000-7f6ca7690000 r-xp 00000000 08:15 131553
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f6ca7690000-7f6ca7890000 ---p 00009000 08:15 131553
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f6ca7890000-7f6ca7891000 r--p 00009000 08:15 131553
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f6ca7891000-7f6ca7892000 rw-p 0000a000 08:15 131553
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f6ca7892000-7f6ca78c0000 rw-p 00000000 00:00 0
7f6ca78c0000-7f6ca78d8000 r-xp 00000000 08:15 131576
/lib/x86_64-linux-gnu/libpthread-2.13.so
7f6ca78d8000-7f6ca7ad7000 ---p 00018000 08:15 131576
/lib/x86_64-linux-gnu/libpthread-2.13.so
7f6ca7ad7000-7f6ca7ad8000 r--p 00017000 08:15 131576
/lib/x86_64-linux-gnu/libpthread-2.13.so
7f6ca7ad8000-7f6ca7ad9000 rw-p 00018000 08:15 131576
/lib/x86_64-linux-gnu/libpthread-2.13.so
7f6ca7ad9000-7f6ca7add000 rw-p 00000000 00:00 0
7f6ca7add000-7f6ca7b60000 r-xp 00000000 08:15 131557
/lib/x86_64-linux-gnu/libm-2.13.so
7f6ca7b60000-7f6ca7d5f000 ---p 00083000 08:15 131557
/lib/x86_64-linux-gnu/libm-2.13.so
7f6ca7d5f000-7f6ca7d60000 r--p 00082000 08:15 131557
/lib/x86_64-linux-gnu/libm-2.13.so
7f6ca7d60000-7f6ca7d61000 rw-p 00083000 08:15 131557
/lib/x86_64-linux-gnu/libm-2.13.so
7f6ca7d61000-7f6ca7d63000 r-xp 00000000 08:15 131555
/lib/x86_64-linux-gnu/libdl-2.13.so
7f6ca7d63000-7f6ca7f63000 ---p 00002000 08:15 131555
/lib/x86_64-linux-gnu/libdl-2.13.so
7f6ca7f63000-7f6ca7f64000 r--p 00002000 08:15 131555
/lib/x86_64-linux-gnu/libdl-2.13.so
7f6ca7f64000-7f6ca7f65000 rw-p 00003000 08:15 131555
/lib/x86_64-linux-gnu/libdl-2.13.so
7f6ca7f65000-7f6ca80fc000 r-xp 00000000 08:15 131550
/lib/x86_64-linux-gnu/libc-2.13.so
7f6ca80fc000-7f6ca82fb000 ---p 00197000 08:15 131550
/lib/x86_64-linux-gnu/libc-2.13.so
7f6ca82fb000-7f6ca82ff000 r--p 00196000 08:15 131550
/lib/x86_64-linux-gnu/libc-2.13.so
7f6ca82ff000-7f6ca8300000 rw-p 0019a000 08:15 131550
/lib/x86_64-linux-gnu/libc-2.13.so
7f6ca8300000-7f6ca8306000 rw-p 00000000 00:00 0
7f6ca8306000-7f6ca8472000 r-xp 00000000 08:15 5423
/usr/lib/libperl.so.5.12.4
7f6ca8472000-7f6ca8671000 ---p 0016c000 08:15 5423
/usr/lib/libperl.so.5.12.4
7f6ca8671000-7f6ca8675000 r--p 0016b000 08:15 5423
/usr/lib/libperl.so.5.12.4
7f6ca8675000-7f6ca867a000 rw-p 0016f000 08:15 5423
/usr/lib/libperl.so.5.12.4
7f6ca867a000-7f6ca869b000 r-xp 00000000 08:15 131226
/lib/x86_64-linux-gnu/ld-2.13.so
7f6ca8871000-7f6ca8876000 rw-p 00000000 00:00 0
7f6ca8898000-7f6ca889a000 rw-p 00000000 00:00 0
7f6ca889a000-7f6ca889b000 r--p 00020000 08:15 131226
/lib/x86_64-linux-gnu/ld-2.13.so
7f6ca889b000-7f6ca889d000 rw-p 00021000 08:15 131226
/lib/x86_64-linux-gnu/ld-2.13.so
7fffc1db5000-7fffc1dd6000 rw-p 00000000 00:00 0
[stack]
7fffc1dff000-7fffc1e00000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]
Aborted
-----------------------------------------------------------------
---
Flags:
category=core
severity=high
---
Site configuration information for perl 5.12.4:
Configured by Debian Project at Tue Sep 6 08:08:24 UTC 2011.
Summary of my perl5 (revision 5 version 12 subversion 4) configuration:
Platform:
osname=linux, osvers=2.6.24-28-server,
archname=x86_64-linux-gnu-thread-multi
uname='linux allspice 2.6.24-28-server #1 smp wed aug 18 21:17:51
utc 2010 x86_64 x86_64 x86_64 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.12 -Darchlib=/usr/lib/perl/5.12
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.12.4
-Dsitearch=/usr/local/lib/perl/5.12.4 -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 -DDEBUGGING=-g -Doptimize=-O2 -Duseshrplib
-Dlibperl=libperl.so.5.12.4 -des'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -g',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fno-strict-aliasing
-pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.6.1', 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 /lib/x86_64-linux-gnu /lib/../lib
/usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=, so=so, useshrplib=true, libperl=libperl.so.5.12.4
gnulibc_version='2.13'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib
-fstack-protector'
Locally applied patches:
---
@INC for perl 5.12.4:
/home/jima/local/share/perl/5.12.4
/home/jima/local/share/perl
/home/jima/lib/perl
/etc/perl
/usr/local/lib/perl/5.12.4
/usr/local/share/perl/5.12.4
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.12
/usr/share/perl/5.12
/usr/local/lib/site_perl
.
---
Environment for perl 5.12.4:
HOME=/home/jima
LANG=en_US.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH=/home/jima/local/lib
LOGDIR (unset)
PATH=/home/jima/bin:/home/jima/local/bin:/home/jima/jima_tools/linux86_64/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/bin/X11:/usr/local/bin:/opt/openoffice.org3/program:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/games:.
PERL5LIB=/home/jima/local/share/perl:/home/jima/lib/perl
PERL_BADLANG (unset)
SHELL=/bin/bash
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