Re: 2.6.25 Kernel - Problems with capabilities

[serge@hallyn.com]

Quoting David R (david@unsolicited.net):
> Quoting serge@hallyn.com:
> 
> > Quoting David (david@unsolicited.net):
> >> Casey Schaufler wrote:
> >>> Do you have a libcap that reflects the change from 32 capabilities
> >>> to 64? You'll be looking for libcap.so.2.06 or thereabouts.
> >>>
> >> Adding libcap-2.08 and recompiling ntpd has fixed the issue, and I'm now
> >> running normally, thanks!
> >
> > I don't understand why, though.  Looking at the ntpd code (ntp-4.2.4p4)
> > it just does a cap_set_proc(cap_from_text("X=epi"));  It should simply
> > be sending in the _LINUX_CAPABILITY_VERSION which shipped with libcap,
> > which should have been _V1, and the kernel should honor that so long as
> > you didn't try to send in caps > 31, which ntpd wasn't.
> >
> >> Was this userspace visible change planned in advance for 2.6.25 ? ... as I
> >> guess a few other people with venerable old userspace components may come
> >> across this issue.
> >>
> >> Cheers
> >> David
> >
> > It's been in the works a long time and we thought we'd done pretty
> > well with backward compatibility.  I really don't see why you had
> > that failure!
> >
> > Do you know which version of libcap you had before?
> 
> /lib/libcap.so.1 -> libcap.so.1.92
> 
> I guess that's 1.92 (should be the version shipped with SuSE 9.1).

Ok, thanks, then it's definately not what I was thinking.

(Will wait to check out your strace)

thanks,
-serge