On Fri, 4 Sep 2009 17:14:32 -0500
Brooks Davis <brooks@FreeBSD.org> wrote:
> On Sat, Aug 29, 2009 at 08:12:28PM +0100, Bruce Cran wrote:
> > On Fri, 24 Jul 2009 15:03:10 +0000 (UTC)
> > Brooks Davis <brooks@FreeBSD.org> wrote:
> > > Author: brooks
> > > Date: Fri Jul 24 15:03:10 2009
> > > New Revision: 195843
> > > URL: http://svn.freebsd.org/changeset/base/195843
> > >
> > > Log:
> > > Revert the changes to struct kinfo_proc in r194498. Instead,
> > > fill in up to 16 (KI_NGROUPS) values and steal a bit from
> > > ki_cr_flags (all bits currently unused) to indicate overflow with
> > > the new flag KI_CRF_GRP_OVERFLOW.
> > >
> > > This fixes procstat -s.
> > >
> > > Approved by: re (kib)
> > Hi Brooks,
> > This checkin appears to have broken crash dump support: the bcopy in
> > kvm_proc.c crashes when running "ps -ax -M /var/crash/vmcore.x
> > -N /boot/kernel/kernel", apparently because ucred.cr_groups isn't
> > valid. Does it need converted using KVM_READ first?
> Sorry for the delay, I believe you are correct we need to use kvm_read
> here instead of the bcopy. Do you still have a core handy you can
> test a patch against? The following should do it.
The patch has fixed the crash, and data is now returned too.