Re: [net-next v3 0/2] eBPF seccomp filters

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On Mon, Feb 26, 2018 at 3:04 PM, Alexei Starovoitov
<alexei.starovoitov@xxxxxxxxx> wrote:
> On Mon, Feb 26, 2018 at 07:26:54AM +0000, Sargun Dhillon wrote:
>> This patchset enables seccomp filters to be written in eBPF. Although, this
>> [...]
> The main statement I want to hear from seccomp maintainers before
> proceeding any further on this that enabling eBPF in seccomp won't lead
> to seccomp folks arguing against changes in bpf core (like verifier)
> just because it's used by seccomp.
> It must be spelled out in the commit log with explicit Ack.

The primary thing I'm concerned about with eBPF and seccomp is
side-effects from eBPF programs running at syscall time. This is an
extremely sensitive area, and I want to be sure there won't be
feature-creep here that leads to seccomp getting into a bad state.

As long as seccomp can continue have its own verifier, I *think* this
will be fine, though, again I remain concerned about maps, etc. I'm
still reviewing these patches and how they might provide overlap with
Tycho's needs too, etc.

-Kees

-- 
Kees Cook
Pixel Security
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