From owner-freebsd-bugs@freebsd.org Thu Feb 15 19:35:00 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DF026F13DA8 for ; Thu, 15 Feb 2018 19:35:00 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7B8606C11C for ; Thu, 15 Feb 2018 19:35:00 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id B833523852 for ; Thu, 15 Feb 2018 19:34:59 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w1FJYx0G093404 for ; Thu, 15 Feb 2018 19:34:59 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w1FJYxu7093403 for freebsd-bugs@FreeBSD.org; Thu, 15 Feb 2018 19:34:59 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 194204] getentropy(2): sys call from openbsd Date: Thu, 15 Feb 2018 19:34:59 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: patch X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: mjg@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Feb 2018 19:35:01 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D194204 --- Comment #11 from Mateusz Guzik --- > I think that's the wrong way to look at it; if we have a weak CSPRNG that= needs to be fixed, regardless of the mechanism by which userland obtains e= ntropy from kernel. The way of looking at it was that if the compatibility mechanism is to be provided it has to be not weaker than OpenBSD equivalent. Entropy for the rest of the kernel is a very different issue. > Seems like it could be implemented as a thin shim around the sysctl, no? = Why do we need a syscall for it? sysctls are very slow, but that may be a somewhat weak point given the natu= re of the request. given the abundance of free syscall numbers and the fact ot= her systems (OpenBSD, Linux) do it as a syscall I don't see a good reason to do= it differently. --=20 You are receiving this mail because: You are the assignee for the bug.=