Re: [PATCH ebpf v2 2/2] bpf: Make unprivileged bpf depend on CONFIG_CPU_SPECTRE

[Pawan Gupta]

On 28.10.2021 07:34, Greg KH wrote:
> On Wed, Oct 27, 2021 at 06:35:44PM -0700, Pawan Gupta wrote:
> > Disabling unprivileged BPF would help prevent unprivileged users from
> > creating the conditions required for potential speculative execution
> > side-channel attacks on affected hardware. A deep dive on such attacks
> > and mitigation is available here [1].
> >
> > If an architecture selects CONFIG_CPU_SPECTRE, disable unprivileged BPF
> > by default. An admin can enable this at runtime, if necessary.
> >
> > Signed-off-by: Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>
> >
> > [1] https://ebpf.io/summit-2021-slides/eBPF_Summit_2021-Keynote-Daniel_Borkmann-BPF_and_Spectre.pdf
>
> This should go above the signed-off-by line, in the changelog text, not
> below it, otherwise our tools get confused when trying to apply it.

Thanks, I will fix it.