Messages in this thread | | | From | "Jason A. Donenfeld" <> | Date | Thu, 22 Dec 2016 16:41:59 +0100 | Subject | Re: [kernel-hardening] Re: [PATCH v7 3/6] random: use SipHash in place of MD5 |
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Hi Hannes,
On Thu, Dec 22, 2016 at 4:33 PM, Hannes Frederic Sowa <hannes@stressinduktion.org> wrote: > IPv6 you cannot touch anymore. The hashing algorithm is part of uAPI. > You don't want to give people new IPv6 addresses with the same stable > secret (across reboots) after a kernel upgrade. Maybe they lose > connectivity then and it is extra work?
Ahh, too bad. So it goes.
> The bpf hash stuff can be changed during this merge window, as it is > not yet in a released kernel. Albeit I would probably have preferred > something like sha256 here, which can be easily replicated by user > space tools (minus the problem of patching out references to not > hashable data, which must be zeroed).
Oh, interesting, so time is of the essence then. Do you want to handle changing the new eBPF code to something not-SHA1 before it's too late, as part of a new patchset that can fast track itself to David? And then I can preserve my large series for the next merge window.
Jason
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