Re: Re: PHP SEGV bug tracing.

On Thu, Feb 24, 2000 at 01:24:43PM -0300, Christian Robottom Reis wrote: > On Thu, 24 Feb 2000, Sascha Schumann wrote: > > > You should try to produce a test case (not longer than 10 > > lines), so please try to reduce the length of your script. It > > makes it much easier to trace down a bug, if we have a simple > > script which reliable reproduces the bug. Thanks. > > I just wondered if it blew up on other people's boxes. > > It's very hard to get a small test case because it's an absurdly unstable > bug - if I change a var_dump here or an if there it stops SEGVing. I > understand it's hard to track down bugs like this, but I can help if I > have at least some pointer as to what I should look for. > > The following test case blows up here on three different systems (doesn't > on my FreeBSD system, alas) with different php binaries (for different > databases and with different options) - I just wonder if anyone is able to > run this on Linux without a SEGV. > > Okay, it's about 10 lines - not too small. But if I remove the eregi or > the base64_decode it runs fine. Some lost pointer somewhere that > surprisingly isn't causing data corruption. > > <? > $str="[brain] =?iso-8859-1?B?RWR1Y2Hn428g4CBEaXN04m5jaWE=?="; > if (eregi("=?([A-Z,0-9,-]+)?([A-Z,0-9,-]+)?([A-Z,0-9,-,=,_]+)?=", $str)) { > $coded_strings = explode(' =?', $str); > while ($counter < sizeof($coded_strings)) { > $elements = explode('?', $coded_strings[$counter]); > base64_decode(str_replace('=', '',$elements[2])); > $counter++; > } > } > ?> > > Better? i'm pretty sure i fixed this one some days ago (in PHP 3 and 4) - please try one of the later snapshits (snaps.php.net) or use the CVS version. the problem bas a short buffer in base64_decode(). regards > > Cheers, > -- > _/\ Christian Reis is sometimes kiko@radiumsystems.com.br > \/~ suicide architect | free software advocate | mountain biker > > > > -- > PHP Development Mailing List <http://www.php.net/> > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > For additional commands, e-mail: php-dev-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > -- Thies C. Arntzen "One Big-Mac, Small Fries and a Coke!" Digital Collections Phone +49 40 235350 Fax +49 40 23535180 Hammerbrookstr. 93 20097 Hamburg / Germany