Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752494Ab3IIGmO (ORCPT ); Mon, 9 Sep 2013 02:42:14 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:39133 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751795Ab3IIGmN (ORCPT ); Mon, 9 Sep 2013 02:42:13 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Christian Kujau Cc: LKML , Vasiliy Kulikov References: Date: Sun, 08 Sep 2013 23:42:05 -0700 In-Reply-To: (Christian Kujau's message of "Sat, 7 Sep 2013 01:51:16 -0700 (PDT)") Message-ID: <87r4cybio2.fsf@xmission.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-AID: U2FsdGVkX18AybCAl3Fw0LVckueffrxzDXBp55q+s+o= X-SA-Exim-Connect-IP: 98.207.154.105 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -0.0 BAYES_20 BODY: Bayes spam probability is 5 to 20% * [score: 0.0827] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 1.2 XMSubMetaSxObfu_03 Obfuscated Sexy Noun-People * 1.0 XMSubMetaSx_00 1+ Sexy Words X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: *;Christian Kujau X-Spam-Relay-Country: Subject: Re: proc hidepid=2 and SGID programs X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Wed, 14 Nov 2012 14:26:46 -0700) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 717 Lines: 23 Christian Kujau writes: > Hi, > > I was wondering why I cannot see processes that were started from SGID > programs: I don't have a clue why anyone would want to hide processes, and make their own lives more difficult. The check with hidepid is can you ptrace the process. I expect there is something with those sgid processes that keeps you from ptracing them. Of course if you don't like the silly behavior you can always disable it. 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/