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Perl fails with message 'panic: attempt to copy freed scalar' #13622

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p5pRT opened this issue Feb 26, 2014 · 4 comments
Open

Perl fails with message 'panic: attempt to copy freed scalar' #13622

p5pRT opened this issue Feb 26, 2014 · 4 comments
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distro-Linux type-core

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@p5pRT
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p5pRT commented Feb 26, 2014

Migrated from rt.perl.org#121328 (status was 'open')

Searchable as RT121328$
@p5pRT
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p5pRT commented Feb 26, 2014

From mark+perlbug@carnildo.com

Created by mark+perlbug@carnildo.com

Running the following program as 'perl crash.pl --help' fails with the
error message 'panic​: attempt to copy freed scalar 1a63798 to 1a4fde8
at crash.pl line 11'

#!/usr/bin/perl
sub dfunc
{
  shift @​{$_[0]};
}
sub ParseOptions
{
  dfunc(\@​ARGV);
  return @​_;
}
@​args = ParseOptions(@​ARGV);

This crash is present in both verisons 5.16.3 and 5.18.1.

Perl Info 

Flags:
    category=core
    severity=low

Site configuration information for perl 5.18.1:

Configured by Gentoo at Wed Feb 26 08:23:55 UTC 2014.

Summary of my perl5 (revision 5 version 18 subversion 1) configuration:
   
  Platform:
    osname=linux, osvers=3.10.25-gentoo, archname=x86_64-linux
    uname='linux localhost 3.10.25-gentoo #1 wed feb 26 06:37:30 utc
2014 x86_64 intel(r) core(tm) i7-3930k cpu @ 3.20ghz genuineintel
gnulinux ' config_args='-des -Duseshrplib -Darchname=x86_64-linux
-Dcc=x86_64-pc-linux-gnu-gcc -Doptimize=-O2 -pipe -march=native
-Dldflags=-Wl,-O1 -Wl,--as-needed -Dprefix=/usr -Dinstallprefix=/usr
-Dsiteprefix=/usr/local -Dvendorprefix=/usr -Dscriptdir=/usr/bin
-Dprivlib=/usr/lib64/perl5/5.18.1
-Darchlib=/usr/lib64/perl5/5.18.1/x86_64-linux
-Dsitelib=/usr/local/lib64/perl5/5.18.1
-Dsitearch=/usr/local/lib64/perl5/5.18.1/x86_64-linux
-Dvendorlib=/usr/lib64/perl5/vendor_perl/5.18.1
-Dvendorarch=/usr/lib64/perl5/vendor_perl/5.18.1/x86_64-linux
-Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3
-Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3
-Dvendorman1dir=/usr/share/man/man1 -Dvendorman3dir=/usr/share/man/man3
-Dman1ext=1 -Dman3ext=3pm -Dlibperl=libperl.so.5.18.1
-Dlocincpth=/usr/include  -Dglibpth=/lib64 /usr/lib64  -Duselargefiles
-Dd_semctl_semun -Dcf_by=Gentoo -Dmyhostname=localhost
-Dperladmin=root@localhost -Dinstallusrbinperl=n -Ud_csh -Uusenm
-Di_ndbm -Di_gdbm -Di_db -DDEBUGGING=none
-Dinc_version_list=5.18.0/x86_64-linux 5.18.0
-Dlibpth=/usr/local/lib64 /lib64 /usr/lib64 -Dnoextensions=ODBM_File'
hint=recommended, useposix=true, d_sigaction=define useithreads=undef,
usemultiplicity=undef useperlio=define, d_sfio=undef,
uselargefiles=define, usesocks=undef use64bitint=define,
use64bitall=define, uselongdouble=undef usemymalloc=n,
bincompat5005=undef Compiler: cc='x86_64-pc-linux-gnu-gcc', ccflags
='-fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64', optimize='-O2 -pipe -march=native',
cppflags='-fno-strict-aliasing -pipe -fstack-protector' ccversion='',
gccversion='4.7.3', 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='x86_64-pc-linux-gnu-gcc',
ldflags ='-Wl,-O1 -Wl,--as-needed -fstack-protector'
libpth=/usr/local/lib64 /lib64 /usr/lib64 libs=-lnsl -lgdbm -ldb -ldl
-lm -lcrypt -lutil -lc -lgdbm_compat perllibs=-lnsl -ldl -lm -lcrypt
-lutil -lc libc=/lib/libc-2.17.so, so=so, useshrplib=true,
libperl=libperl.so.5.18.1 gnulibc_version='2.17' Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-rpath,/usr/lib64/perl5/5.18.1/x86_64-linux/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -pipe -march=native
-fstack-protector'

Locally applied patches:
    


@INC for perl 5.18.1:
    /usr/local/lib64/perl5/5.18.1/x86_64-linux
    /usr/local/lib64/perl5/5.18.1
    /usr/lib64/perl5/vendor_perl/5.18.1/x86_64-linux
    /usr/lib64/perl5/vendor_perl/5.18.1
    /usr/lib64/perl5/5.18.1/x86_64-linux
    /usr/lib64/perl5/5.18.1
    /usr/local/lib64/perl5
    /usr/lib64/perl5/vendor_perl
    .


Environment for perl 5.18.1:
    HOME=/root
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.3
    PERL_BADLANG (unset)
    SHELL=/bin/bash

@p5pRT
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p5pRT commented Feb 27, 2014

From @iabyn

On Wed, Feb 26, 2014 at 01​:00​:19AM -0800, Mark Wagner wrote​:

Running the following program as 'perl crash.pl --help' fails with the
error message 'panic​: attempt to copy freed scalar 1a63798 to 1a4fde8
at crash.pl line 11'

#!/usr/bin/perl
sub dfunc
{
shift @​{$_[0]};
}
sub ParseOptions
{
dfunc(\@​ARGV);
return @​_;
}
@​args = ParseOptions(@​ARGV);

This crash is present in both verisons 5.16.3 and 5.18.1.

Chalk up another one to "the stack args / @​_" aren't reference counted.

--
Never do today what you can put off till tomorrow.

@p5pRT
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p5pRT commented Feb 27, 2014

The RT System itself - Status changed from 'new' to 'open'

@Carnildo
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It appears to be fixed as of 5.30.1.

@xenu xenu removed the affects-5.18 label Nov 19, 2021
@xenu xenu removed the Severity Low label Dec 29, 2021
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