ID: 36267 Updated by: [EMAIL PROTECTED] Reported By: mikeb at tracersinfo dot com -Status: Feedback +Status: Open Bug Type: PCRE related Operating System: Linux PHP Version: 5.1.2 New Comment:
Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. This is all I can get with valgrind and I can't reproduce the segfault without it. ==3882== Process terminating with default action of signal 11 (SIGSEGV) ==3882== Access not within mapped region at address 0xBE7FFF24 ==3882== at 0x806D2FD: match (pcre_exec.c:517) ==3882== Stack overflow in thread 1: can't grow stack to 0xBE7FFEAC Previous Comments: ------------------------------------------------------------------------ [2006-02-02 21:15:49] [EMAIL PROTECTED] the url you refer above doesn't work (error 403). please change the permissions. ------------------------------------------------------------------------ [2006-02-02 21:06:42] mikeb at tracersinfo dot com Description: ------------ I use PCRE's every day to harvest information from webpages (i.e., not a newbie, and I use many very complex expressions regularly). I recently ran into a problem with an expression I needed to use (essentially, to select a particular <table>, its contents, and everything that follows it on page full of tables -- specifically without allowing an intervening <table> or </table> tag) that worked perfectly throughout my development under Windows XP Home SP2. As soon as I ported the script to GNU/Linux (3 different machines: Mandrake 10 [2.6.8 kernel]; 2 Ubuntu 5.10 [2.6.12 kernel]), it segfaults both under the CLI and Apache (1.3.33) SAPI. (The use of once-only subpattern is not significant -- same result is obtained using merely non-matching subpattern.) I've simplified the referenced script to what it takes to reproduce the problem, and I note that significant reduction in size of the two <tag> sections can allow this to function properly under Linux, but I do not have that luxury with arbitrary incoming webpages that must be parsed without advance knowledge of their contents. The same symptom obtains if I attempt to use preg_match instead of preg_replace. One of the failing PHP's config lines: --disable-cgi --with-apxs=/www/bin/apxs --enable-magic-quotes --with-openssl --with-zlib --enable-bcmath --with-bz2 --enable-calendar --with-curl --with-curlwrappers --enable-ftp --with-gd --with-mysql --with-mysqli --with-pdo-mysql --with-readline --enable-soap --enable-sockets --with-xsl Fails with stock php.ini-dist. Reproduce code: --------------- http://home.tampabay.rr.com/greenorb/testpregfault2.txt Expected result: ---------------- I expect to see the first <tag> tag echoed to my screen with a legend that "Stripfootpat worked". (Note that this IS the result obtained under Win32 [Windows XP Pro/Home SP2].) Actual result: -------------- Segmentation fault ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36267&edit=1
