On Thu, May 01, 2014 at 09:18:07AM -0600, Theo de Raadt wrote:
> > On Thu, May 01, 2014 at 05:03:12PM +0200, Peter J. Philipp wrote:
> >
> > > Hi,
> > >
> > > I recently bought a new computer and it runs OpenBSD (latest snapshot,
> > > -current) natively. Everything is fine except a program I develop on
> > > and it crashes according to gdb with a SIGBUS.
> > >
> > > When I run this program on another amd64 computer (vmware fusion on mac,
> > > OpenBSD 5.5-stable), I do not get the SIGBUS's and the program behaves
> > > normally.
> > >
> > > So I'm wondering why no coredumps? SIGBUS is supposed to dump core.
> > >
> > > I have:
> > >
> > > # ls /var/crash
> > > minfree
> > > # sysctl -a|grep suid
> > > kern.nosuidcoredump=2
> > > # ls -ld /var/crash
> > > drwxrwxrwt 2 root wheel 512 Apr 30 21:05 /var/crash
> > >
> > > is this not enough to make my program which setresuid()'s after fork,
> > > core?
> >
> > your program also has to be running in a dir where it can write. It
> > will not automatically write to /var/crash, that's for kernel dumps.
>
> Not true. He is using nosuidcoredump=2. And it appears it got broken
> a while back.
>
> I am working on something even better, but not willing to share it yet :-)
Oops, wasn't paying attention.
-Otto
