Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751878AbZL2U45 (ORCPT ); Tue, 29 Dec 2009 15:56:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751810AbZL2U44 (ORCPT ); Tue, 29 Dec 2009 15:56:56 -0500 Received: from out01.mta.xmission.com ([166.70.13.231]:58009 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751741AbZL2U4y (ORCPT ); Tue, 29 Dec 2009 15:56:54 -0500 To: Bryan Donlan Cc: "Serge E. Hallyn" , Michael Stone , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-security-module@vger.kernel.org, Andi Kleen , David Lang , Oliver Hartkopp , Alan Cox , Herbert Xu , Valdis Kletnieks , Evgeniy Polyakov , "C. Scott Ananian" , James Morris , Bernie Innocenti , Mark Seaborn , Randy Dunlap , =?iso-8859-1?Q?Am=E9rico?= Wang , Tetsuo Handa , Samir Bellabes , Casey Schaufler , Pavel Machek , Al Viro References: <20091229050114.GC14362@heat> <20091229151146.GA32153@us.ibm.com> <3e8340490912290805s103fb789y13acea4a84669b20@mail.gmail.com> <20091229163939.GA6984@us.ibm.com> <3e8340490912290901y60d7daf2w5778c25f44972955@mail.gmail.com> <3e8340490912291108t7e000e75p8264fa585f831464@mail.gmail.com> From: ebiederm@xmission.com (Eric W. Biederman) Date: Tue, 29 Dec 2009 12:56:44 -0800 In-Reply-To: <3e8340490912291108t7e000e75p8264fa585f831464@mail.gmail.com> (Bryan Donlan's message of "Tue\, 29 Dec 2009 14\:08\:30 -0500") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in01.mta.xmission.com;;;ip=76.21.114.89;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 76.21.114.89 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Bryan Donlan X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -3.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 XM_SPF_Neutral SPF-Neutral * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay Subject: Re: RFC: disablenetwork facility. (v4) X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 785 Lines: 20 Bryan Donlan writes: > It's probably reasonable to require that real == effective == saved == > fs UID (and same for GID); anything else brings up sticky issues of > "which UID is a higher capability?" > If a process does this call, it's effectively saying that the only way > it's going to be accessing resources beyond its current UID and > capabilities is by talking to another process over a (unix domain) > socket. Makes sense. Especially for the initial implementation, and it keeps the code size small. Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/