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Bug #21615 PCRE segfault with (very) large string.
Submitted: 2003-01-13 07:51 UTC Modified: 2003-06-04 00:26 UTC
Votes:4
Avg. Score:4.0 ± 1.0
Reproduced:3 of 3 (100.0%)
Same Version:0 (0.0%)
Same OS:1 (33.3%)
From: olivier dot gondouin at planet-service dot fr Assigned:
Status: No Feedback Package: Reproducible crash
PHP Version: 4.3.0 OS: GNU/linux
Private report: No CVE-ID: None
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From: olivier dot gondouin at planet-service dot fr
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 [2003-01-13 07:51 UTC] olivier dot gondouin at planet-service dot fr 
PCRE segfault on a big regular expression on a really big string (>17490 chars)


special parameters in php.ini file:
memory_limit = 64M

test script:
http://planet-service.fr/test2.php.gz
this script test a substring of the crashing string.
a loop do the test with this substring, and increase the size of the string at each step and print out the size.

I put 17490 as starting size as that crash at 17491. The parameters at at the end of the script (after the string itself).


compilation options:

./configure  --prefix=/opt/php-4.3.0 --with-apache=../apache_1.3.27 --with-config-file-path=/opt/php-4.3.0/lib --enable-calendar --enable-track-vars --enable-ftp --with-readline --with-imap=/opt/c-client --with-openssl=/opt/openssl --with
-gdbm=/usr --with-mysql=/opt/mysql --with-pgsql=/opt/postgresql --enable-trans-sid -with-regex=php --enable-sysvsem --enable-sysvshm --enable-memory-limit --enable-debug=no --with-ttf=/opt/freetype --with-t1lib=/opt/t1lib --with-xml --enable-sockets --with-jpeg-dir=/opt/jpeg --with-tiff-dir=/opt/tiff --with-png-dir=/opt/libpng --with-zlib-dir=/opt/zlib --with-gd --enable-gd-native-ttf --enable-exif --with-pdflib=/opt/pdflib --enable-bcmath --with-ming=/opt/ming --with-bz2=/opt/bzip2 --with-zlib --with-dom=/opt/libxml2 --with-dom-xslt=/opt/libxslt
--with-dom-exslt=/opt/libxslt --enable-xslt --with-xslt-sablot=/opt/sablotron --with-expat-dir=/opt/expat --with-ldap=/opt/openldap --with-mcal=/opt/libmcal --with-curl=/opt/curl-7.10.2 --with-iconv=/opt/libiconv --enable-mbstring --with-zip=/opt/zziplib

Olivier

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 [2003-01-13 09:53 UTC] iliaa@php.net 
Cannot download the test script due to what appears to be a parse error. Could you please make the file avaliable as text (.txt).
 [2003-01-13 10:55 UTC] olivier dot gondouin at planet-service dot fr 
I'm really sorry:

http://planet-service.fr/test2.php.gz
 [2003-01-13 10:56 UTC] olivier dot gondouin at planet-service dot fr 
oops:
http://planet-service.fr/test2.txt.gz
 [2003-01-13 16:26 UTC] iliaa@php.net 
The actual crash occurs inside the pcrelib, so it could pcre related, but since I am unable to replicate the crash using pcre command line tools it maybe PHP related after all.
 [2003-01-13 17:14 UTC] olivier dot gondouin at planet-service dot fr 
for information ther's the same bug on php-4.2.3 compiled more infos.

With same parameters (only gd external lib was used instead of 4.3 bundled).

But this works fine on Mandrake linux 8.2 system with its own rpmized php (php-4.1.2 I think).
Don't know if Mandrake team applied a special patch on sources???
 [2003-01-13 17:21 UTC] iliaa@php.net 
Could you please confirm the PHP & PCRE version that are used in the 'working' version, that would be of great help.
 [2003-01-14 09:42 UTC] olivier dot gondouin at planet-service dot fr 
after php.ini: 
the working php is 4.1.2 from this distribution/kernel:
Linux montreal.mandrakesoft.com 2.4.18-1mdksmp #1 SMP

configure options are (after php.ini):
 './configure' '--disable-static' '--disable-debug' '--disable-rpath' '--enable-pic' '--enable-inline-optimization' '--prefix=/usr' '--with-zlib' '--with-config-file-path=/etc' '--enable-magic-quotes' '--enable-debugger' '--enable-track-vars' '--enable-safe-mode' '--with-exec-dir=/usr/bin' '--with-regex=system' '--with-versioning' '--enable-sysvsem' '--enable-sysvshm' '--with-mod_charset' '--enable-force-cgi-redirect' '--enable-trans-sid' '--with-dbase' '--with-filepro' '--enable-yp' '--enable-ftp' '--with-gettext' '--with-ttf' '--with-freetype-dir'  [Some modules are external: look for packages php-pgsql,php-mysql,...]

PCRE is:
PCRE Library Version3.4 22-Aug-2000
 [2003-03-04 04:03 UTC] moriyoshi@php.net 
Similar to bug #21389
 [2003-05-30 10:26 UTC] iliaa@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php4-STABLE-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-STABLE-latest.zip
 [2003-06-04 00:26 UTC] sniper@php.net 
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
 
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