> as you can read in this new bug report that I submitted: > > GNU debugger employed via Postfix crashed PaX hardened kernel > https://bugs.gentoo.org/show_bug.cgi?id=541104 > > also: > > GNU debugger checking for PaX and refusing to work with it > https://forums.gentoo.org/viewtopic-t-1011162.html > > and: > > PAX terminating task on /usr/bin/gdb > http://forums.grsecurity.net/viewtopic.php?f=3&t=4137 > > In short, from: > > https://541104.bugs.gentoo.org/attachment.cgi?id=397334 > > Feb 23 08:43:51 gbn kernel: [30489.762828] grsec: bruteforce prevention > initiated for the next 30 minutes or until service restarted, stalling > each fork 30 seconds. Please investigate the crash report for > /usr/bin/gdb[gdb:14515] uid/euid:0/0 gid/egid:0/0, parent > /usr/bin/gdb[gdb:14507] uid/euid:0/0 gid/egid:0/0 > > > but, if Postfix is configured correctly, mail is still sent... but the > scare is ugly... > > Surely, the gdb on such kernel does no work at all, other than the scare > on the poor user. > > I think it would be a good thing to post a line that reflects this > issue, and warns Grsec-hardened users of it, in the: > > http://www.postfix.org/DEBUG_README.html
I fear this is not a Postfix issue. You always will have trouble with gdb debugging under Gentoo hardening. And the kernel did not crash as you reported. It simply put a line in the message buffer informing you about issues ;-) As I had similar problems with other software under Gentoo, I did a trick: I also installed gentoo-sources and if I really want to do debugging, I reboot into the gentoo-sources kernel. Even if setting things with paxctl, it will be mostly impossible to get things working. I had enormous problems to debug OpenDKIM that way, until I switched to another kernel while debugging. Christian -- Bachelor of Science Informatik Erlenwiese 14, 36304 Alsfeld T: +49 6631 78823400, F: +49 6631 78823409, M: +49 171 9905345 USt-IdNr.: DE225643613, http://www.roessner-network-solutions.com
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