# New Ticket Created by David Leadbeater
# Please include the string: [perl #68348]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=68348 >
This is a bug report for perl from [email protected],
generated with the help of perlbug 1.36 running under perl 5.10.0.
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[Please enter your report here]
When deserialising truncated storable data where the truncation is within a
coderef there seems to be a null pointer dereference:
Program received signal SIGSEGV, Segmentation fault.
retrieve_code (my_perl=0x754010, cxt=0x8c3750, cname=0x0) at Storable.xs:5438
5438 sv_catpv(sub, SvPV_nolen(text)); /* XXX no sv_catsv! */
text is 0x0.
Code to reproduce is below, rather oddly if you uncomment the use v5.10 line it
doesn't seem to segfault.
# Uncommenting the line below appears to stop the segfault
#use v5.10;
use Storable qw(freeze thaw);
$Storable::Eval = 1;
$Storable::Deparse = 1;
for(4000..5000) {
print "$_\n";
my $s = {
i => sub { "foo" },
x => "y" x $_,
y => sub { "foo" },
};
thaw(substr(freeze($s), 0, 4096));
}
It seems to vary slightly on different machines but this segfaults after
27-31 iterations for me.
[Please do not change anything below this line]
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---
Flags:
category=library
severity=medium
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Site configuration information for perl 5.10.0:
Configured by Debian Project at Fri Jun 26 18:43:11 UTC 2009.
Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
Platform:
osname=linux, osvers=2.6.24-23-server, archname=i486-linux-gnu-thread-multi
uname='linux rothera 2.6.24-23-server #1 smp wed apr 1 22:22:14 utc 2009 i686 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.10 -Darchlib=/usr/lib/perl/5.10 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.10.0 -Dsitearch=/usr/local/lib/perl/5.10.0 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm -DDEBUGGING=-g -Doptimize=-O2 -Duseshrplib -Dlibperl=libperl.so.5.10.0 -Dd_dosuid -des'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=undef, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -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 -fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='4.3.3', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/lib64
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.9.so, so=so, useshrplib=true, libperl=libperl.so.5.10.0
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib'
Locally applied patches:
---
@INC for perl 5.10.0:
/etc/perl
/usr/local/lib/perl/5.10.0
/usr/local/share/perl/5.10.0
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.10
/usr/share/perl/5.10
/usr/local/lib/site_perl
.
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Environment for perl 5.10.0:
HOME=/home/dgl
LANG=en_GB.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/usr/lib/jvm/java-1.5.0-sun/bin:/home/dgl/bin:/sbin:/usr/sbin:/usr/local/sbin:/sw/bin:/sw/sbin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PERL_BADLANG (unset)
SHELL=/bin/zsh
