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=-14.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0601DC433DB for ; Wed, 10 Feb 2021 05:19:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C71FA64E45 for ; Wed, 10 Feb 2021 05:19:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231281AbhBJFTJ (ORCPT ); Wed, 10 Feb 2021 00:19:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:33768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231255AbhBJFTH (ORCPT ); Wed, 10 Feb 2021 00:19:07 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2658764E42; Wed, 10 Feb 2021 05:18:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1612934307; bh=r8mlLnkiTtqHjwX7GPDdrTYdtz5ipUM83ae8N83ypv0=; h=From:To:Subject:Date:From; b=p3BkaluQeAe+D7tVC7ezEiSj63R3tHm0kVkGz5PhnawSERsD4o4EmzwPRLeTDEyVk W2Es7rCZBCGuILlzJQXS4TSkk9N1aEaw7Ap7SRjaver3H9qpGtVKm4NdYxqDz3ac3r fESqAjPY/KpMzfbsY/jbf1R692+e2Wg7mBck8DDO5PWkN6g0g/GTcZN02MegnkXTxB Vo/dB/ewF2q6SyMwQlJ8IVfOH2yGUXJqqJxk+M6FzLlHYAToOXFCIDa9UWlZb/HviA ZnifXDhIuRbrHRjWhmDmDlx6bHmQBfRf4CzvG6qXQVRp3L92VPhguumWgZGJ6uvVho rXH5FTiECjrxw== From: Timur Tabi To: Petr Mladek , Steven Rostedt , Sergey Senozhatsky , Vlastimil Babka , Andy Shevchenko , Matthew Wilcox , akpm@linux-foundation.org, Linus Torvalds , roman.fietze@magna.com, Kees Cook , John Ogness , akinobu.mita@gmail.com, glider@google.com, Andrey Konovalov , Marco Elver , Rasmus Villemoes , Pavel Machek , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/3][RESEND] add support for never printing hashed addresses Date: Tue, 9 Feb 2021 23:18:11 -0600 Message-Id: <20210210051814.845713-1-timur@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [accidentally sent from the wrong email address, so resending] [The list of email addresses on CC: is getting quite lengthy, so I hope I've included everyone.] Although hashing addresses printed via printk does make the kernel more secure, it interferes with debugging, especially with some functions like print_hex_dump() which always uses hashed addresses. To avoid having to choose between %p and %px, it's easier to add a kernel command line that treats all %p as %px. This encourages developers to use %p more without making debugging more difficult. Patches #1 and #2 upgrade the kselftest framework so that it can report on tests that were skipped outright. This is needed for the test_printf module which will now skip %p hashing tests if hashing is disabled. Patch #2 upgrades the printf library to check the command line. It also updates test_printf(). Timur Tabi (3): lib/test_printf: use KSTM_MODULE_GLOBALS macro kselftest: add support for skipped tests [v2] lib/vsprintf: make-printk-non-secret printks all addresses as unhashed .../admin-guide/kernel-parameters.txt | 15 +++++++ lib/test_printf.c | 12 +++++- lib/vsprintf.c | 40 ++++++++++++++++++- tools/testing/selftests/kselftest_module.h | 18 ++++++--- 4 files changed, 75 insertions(+), 10 deletions(-) -- 2.25.1