Messages in this thread | | | From | Serge Hallyn <> | Subject | Re: [PATCH] Trace event for capable(). | Date | Fri, 18 May 2012 18:19:23 -0500 |
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----- Original message ----- > On Fri, May 18, 2012 at 3:33 PM, richard -rw- weinberger > <richard.weinberger@gmail.com> wrote: > > > > On Thu, May 17, 2012 at 9:50 PM, Auke Kok <auke-jan.h.kok@intel.com> > > wrote: > > > Add a simple trace event for capable(). > > > > > > There's been a lot of discussion around capable(), and there > > > are plenty of tools to help reduce capabilities' usage from > > > userspace. A major gap however is that it's almost impossible > > > to see or verify which bits are requested from either userspace > > > or in the kernel. > > > > > > This patch adds a minimal tracer that will print out which > > > CAPs are requested and whether the request was granted. > > > > Can we please have support for user namespaces? > > At least idicate whether the current namespace is init_user_ns or not. > > that was the main reason for sending this out already - that should be > trivial to add to the trace event, but I haven't looked at namespaces > yet myself. I'll check it out. >
right, trivial to add, but either go through linux-next or wait for Eric's patchset to move from there to Linus' tree. Print the from_kuid(&init_user_ns, current_uid()), and if not in init_user_ns then also print the ns creator and task uid in his own ns.
I don't think you need to do that right now.
> Auke > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" > in the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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