From: Hannes Frederic Sowa <hannes@stressinduktion.org>
To: Andy Lutomirski <luto@kernel.org>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
"Theodore Ts'o" <tytso@mit.edu>, Netdev <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
David Laight <David.Laight@aculab.com>,
Eric Dumazet <edumazet@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Eric Biggers <ebiggers3@gmail.com>,
Tom Herbert <tom@herbertland.com>,
Andi Kleen <ak@linux.intel.com>,
"David S. Miller" <davem@davemloft.net>,
Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
Subject: Re: BPF hash algo (Re: [kernel-hardening] Re: [PATCH v7 3/6] random: use SipHash in place of MD5)
Date: Thu, 22 Dec 2016 21:02:29 +0100 [thread overview]
Message-ID: <c82ea5a2-3139-5f12-e5f7-df2e1a6d9c24@stressinduktion.org> (raw)
In-Reply-To: <CALCETrUWw2m8k3b8ibOeN-7o9b+8MrnX4btUWqS188WSsLzDjg@mail.gmail.com>
On 22.12.2016 20:56, Andy Lutomirski wrote:
> It's also not quite clear to me why userspace needs to be able to
> calculate the digest on its own. A bpf(BPF_CALC_PROGRAM_DIGEST)
> command that takes a BPF program as input and hashes it would seem to
> serve the same purpose, and that would allow the kernel to key the
> digest and change the algorithm down the road without breaking things.
I think that people expect digests of BPF programs to be stable over
time and reboots.
next prev parent reply other threads:[~2016-12-22 20:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 16:07 Andy Lutomirski
2016-12-22 16:28 ` Jason A. Donenfeld
2016-12-22 16:53 ` Andy Lutomirski
2016-12-22 16:59 ` Hannes Frederic Sowa
2016-12-22 17:25 ` Andy Lutomirski
2016-12-22 17:49 ` Hannes Frederic Sowa
2016-12-22 19:34 ` Alexei Starovoitov
2016-12-22 19:56 ` Andy Lutomirski
2016-12-22 20:02 ` Hannes Frederic Sowa [this message]
2016-12-23 10:23 ` Daniel Borkmann
2016-12-22 18:19 ` Jason A. Donenfeld
2016-12-23 10:04 ` Daniel Borkmann
2016-12-23 10:59 ` Hannes Frederic Sowa
2016-12-23 11:59 ` Daniel Borkmann
2016-12-23 16:23 ` Andy Lutomirski
2016-12-23 16:42 ` Andy Lutomirski
2016-12-23 18:19 ` Hannes Frederic Sowa
2016-12-23 21:18 ` Jason A. Donenfeld
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