ID: 45735
Updated by: [email protected]
Reported By: johnston dot joshua at gmail dot com
Status: Bogus
Bug Type: PCRE related
Operating System: *
PHP Version: 5.2CVS, 5.3CVS, 6CVS (2008-08-06)
New Comment:
I seen that PCRE has a NO_RECURSE flag to avoid the recursion in
match() (described in pcre_exec.c).
Defining NO_RECURSE at compile time avoids this problem :)
diff -u -r1.38.2.3.2.10.2.3 config0.m4
--- ext/pcre/config0.m4 2 Jun 2008 14:12:20 -0000
1.38.2.3.2.10.2.3
+++ ext/pcre/config0.m4 7 Aug 2008 11:25:39 -0000
@@ -59,7 +59,7 @@
pcrelib/pcre_ord2utf8.c
pcrelib/pcre_refcount.c pcrelib/pcre_study.c \
pcrelib/pcre_tables.c
pcrelib/pcre_try_flipped.c pcrelib/pcre_valid_utf8.c \
pcrelib/pcre_version.c
pcrelib/pcre_xclass.c"
- PHP_NEW_EXTENSION(pcre, $pcrelib_sources php_pcre.c, no,,-
+ PHP_NEW_EXTENSION(pcre, $pcrelib_sources php_pcre.c, no,,-
PHP_ADD_BUILD_DIR($ext_builddir/pcrelib)
PHP_INSTALL_HEADERS([ext/pcre], [php_pcre.h pcrelib/])
AC_DEFINE(HAVE_BUNDLED_PCRE, 1, [ ])
Previous Comments:
------------------------------------------------------------------------
[2008-08-07 08:28:20] [email protected]
AFAIK only be using a non-stack based evaluator (pcre_dfa_exec)...
which is not compatible with the perl regular expressions, see the
description at
http://manpages.courier-mta.org/htmlman3/pcre_dfa_exec.3.html
------------------------------------------------------------------------
[2008-08-06 17:47:50] johnston dot joshua at gmail dot com
I understand it is a known pcre behavior but does that mean it is ok to
let pcre trigger a segmentation fault? Is there no possible way to
handle this failure gracefully?
------------------------------------------------------------------------
[2008-08-06 17:40:50] [email protected]
.
------------------------------------------------------------------------
[2008-08-06 17:40:08] [email protected]
That is known PCRE behavior.
See: http://manpages.courier-mta.org/htmlman3/pcrestack.3.html
------------------------------------------------------------------------
[2008-08-06 17:29:06] johnston dot joshua at gmail dot com
In my case the parens were unnecessary so I removed them which stopped
the Seg Fault.
Is there a way to handle this error from inside php?
If I set pcre.backtrack_limit to any other value will it always seg
fault if it is too low?
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/45735
--
Edit this bug report at http://bugs.php.net/?id=45735&edit=1
lmpx.com only provides a reader for public news (NNTP) servers. It is not
affiliated with the servers or forums shown here and is not responsible for
the content of articles, which is written by their respective authors.