I logged on to my server today to find the error_log full of "httpd in free(): warning: recursive call." all sites on the server are unavailable, but the CP and other things running on ports other than 80 are accesible.

what excatly could cause httpd in free(): warning: recursive call. to show up in the log, and how could all this be fixed?

=THanks

Is this a freebsd box?

Yes, FreeBSD 4.4

This got me curious so I went and searched the newsgroups and it seems to be something to do with php.. possibly an exploit of some sort. Are you using PHP 4.1.2? You might try upgrading to 4.2.0.. There's some limited info in the newsgroups.. search for the error at groups.google.com if you haven't already.

Thanks for looking, JDF. I did a fairly extensive search myself, without much luck.

Everything is fixed now, but it still would be nice to know.

I serched on google and it seemed to be with freebsd, never found any solutions to it though.