From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 018C4C433F5 for ; Mon, 6 Sep 2021 12:47:52 +0000 (UTC) Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5447961027 for ; Mon, 6 Sep 2021 12:47:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5447961027 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux.it Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id B3E823C952C for ; Mon, 6 Sep 2021 14:47:49 +0200 (CEST) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [217.194.8.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 985B33C259B for ; Mon, 6 Sep 2021 14:47:39 +0200 (CEST) Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id D9B811400E44 for ; Mon, 6 Sep 2021 14:47:38 +0200 (CEST) Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 0D3171FEF2; Mon, 6 Sep 2021 12:47:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1630932458; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vsm8AgZ8CgcVlrqFrdW/hLZYQVANt8RNhWwI7TOWQK8=; b=gc+9dC9Sq+PbMLt6PNsT3A8oKFUzUQL0sFiTrol3FGA6UqbVdy20K7fJCia+SjqaHJZOSL eqlxIKR42DL62TDjc2rqFfIAOiZphraJjdLnxs0g2QgEP9UqXIEeKV9e1iIWZG09dcau2l r3lRPcoq47axq2QGKIcbhkr8em/ef+I= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1630932458; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vsm8AgZ8CgcVlrqFrdW/hLZYQVANt8RNhWwI7TOWQK8=; b=r4M5gdfD3AIr28w7gqn1BU2NJkUnabkkk5NgciC0m6k1jf5IcNuSU4SNE3nCnTPPAm5roc Nl2syslpOXp8/QAg== Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap1.suse-dmz.suse.de (Postfix) with ESMTPS id EB0C61396D; Mon, 6 Sep 2021 12:47:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id KxS0N+kNNmFYNgAAGKfGzw (envelope-from ); Mon, 06 Sep 2021 12:47:37 +0000 Message-ID: <77fd98d9-5257-c1da-a01b-77d8cc1b6bce@suse.cz> Date: Mon, 6 Sep 2021 14:47:37 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.0.1 Content-Language: en-US To: Cyril Hrubis References: <20210903154848.18705-1-mdoucha@suse.cz> <20210903154848.18705-5-mdoucha@suse.cz> From: Martin Doucha In-Reply-To: X-Virus-Scanned: clamav-milter 0.102.4 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH 4/7] syscalls/kill05: Use any two unprivileged users X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Message-ID: <20210906124737.3Q1DPf9PXT6cpg9bVzRwE_kzsIdSlE6rgKIbR4aRnko@z> On 06. 09. 21 14:28, Cyril Hrubis wrote: > Hi! >> Usernames such as "bin" may not exist on some systems. Find and use any two >> unprivileged user IDs for the test instead of specific named users. > > I do wonder if we have to lookup the UIDs in this case. As long as I > understand the test correctly we are testing that no signals are send to > a process if the sender real of effective UID do not match either of > real and saved set UIDs of the receiving process. If my understanding is > correct we can just take two arbitrary UIDs that != 0 and the test > should work just fine. We could just use UID 1 and 2 for this test but I'd rather not assume that set*uid() functions allow setting unused UIDs. Even if it works now, it could easily break in the future or on some special system auth backends. -- Martin Doucha mdoucha@suse.cz QA Engineer for Software Maintenance SUSE LINUX, s.r.o. CORSO IIa Krizikova 148/34 186 00 Prague 8 Czech Republic -- Mailing list info: https://lists.linux.it/listinfo/ltp