From patchwork Tue Aug 11 05:39:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 11708567 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5BD621392 for ; Tue, 11 Aug 2020 05:39:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F2E920781 for ; Tue, 11 Aug 2020 05:39:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="BrmmSX27" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726411AbgHKFjf (ORCPT ); Tue, 11 Aug 2020 01:39:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726326AbgHKFjf (ORCPT ); Tue, 11 Aug 2020 01:39:35 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 50A99C061756 for ; Mon, 10 Aug 2020 22:39:35 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id o8so15432812ybg.16 for ; Mon, 10 Aug 2020 22:39:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=eI3dpvpZLLpmJ9nqCDi7T91G61DRoZz1t5zO7N7HKA8=; b=BrmmSX27ZRi82o7xEzX2l5M/sJN6sMvF5eCXUYLzJ0vt6z/eZSp8FiktjvhFRHGg3a xN1efG2MozbLRkMpoPfW0LtCCXCTgYehg18sKbiZIypQlBi06akHrSp8zuEwCAzDL0hM wTfHxdWS/psRpaNOKLJiviTtXwBv9EIcQbChOz6Dai+cfTM9+AAdFQaikiAxIRuGBx2r I+HqIeg9nX0eU0rDDlrmPZXIFdKnrg66YeGtl1MlnDaCwIArVV6+dTQyPEnDGOVUdlWC r5Ogv5mGen0CEDU6/h46gy5hAAC3H+WLg/KVNNd3i3+J/7rc/K0Z4q5z590roifWPDOy Vp8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=eI3dpvpZLLpmJ9nqCDi7T91G61DRoZz1t5zO7N7HKA8=; b=abqVRJgnUqCjKbNJquxbj0hCPBkbstx+/vtQ5KNIEcVfRWSBWhSsJ3N01Cd9vrl90/ 9ytEFrJ6tFLZvcf2zQwk/EoYvx+w6DhHfRC9g1qFH3dvYkgc9mHkO9MW+YjILZmj2rZB g7B0bYu1d1cQ0F3o2RqIZqQiv9R0+3JTtTSkme5udxwy4baw/8zxR9Lk4oYnnDpu7IUx 6PgDIyhs/pB/X85V8Z34UHZfOzMKAuqzmDdLnkE3fB+Jf0r1B95826YP9pgytNkbvqHP CisD9s+jtAYd/+ITvdJPReJUT0xN8xdseDniFb9Vo9sGUl5edO+wm7iR+WlrYqvs2E1r mz6Q== X-Gm-Message-State: AOAM533qnBwVrHDxdrvbg/2HA6n249hK93m0KZ3cfwtC3SYiQzF6RtEr V9u8Bwx0m4JjHooVIyHq+EccDgAJrUSthQ== X-Google-Smtp-Source: ABdhPJxZFZ0NcbWXJxUbFG2ezYdT7p63Z4lATrGjue8Q0YNqAuGMcw2vz1LPFixU8ZifT2aWSpQa4CR39vDMXw== X-Received: by 2002:a25:de48:: with SMTP id v69mr15076735ybg.191.1597124374426; Mon, 10 Aug 2020 22:39:34 -0700 (PDT) Date: Mon, 10 Aug 2020 22:39:09 -0700 Message-Id: <20200811053914.652710-1-davidgow@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.28.0.236.gb10cc79966-goog Subject: [PATCH v12 0/6] KASAN-KUnit Integration From: David Gow To: trishalfonso@google.com, brendanhiggins@google.com, aryabinin@virtuozzo.com, dvyukov@google.com, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, andreyknvl@google.com, shuah@kernel.org, akpm@linux-foundation.org Cc: David Gow , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This patchset contains everything needed to integrate KASAN and KUnit. KUnit will be able to: (1) Fail tests when an unexpected KASAN error occurs (2) Pass tests when an expected KASAN error occurs Convert KASAN tests to KUnit with the exception of copy_user_test because KUnit is unable to test those. Add documentation on how to run the KASAN tests with KUnit and what to expect when running these tests. This patchset depends on: - "kunit: extend kunit resources API" [1] - This is included in the KUnit 5.9-rci pull request[8] Sorry for spamming you all with all these revisions. I'd _really_ like to get this into 5.9 if possible: we also have some other changes which depend on some things here. Changes from v11: - Rebased on top of latest -next (20200810) - Fixed a redundant memchr() call in kasan_memchr() - Added Andrey's "Tested-by" to everything. Changes from v10: - Fixed some whitespace issues in patch 2. - Split out the renaming of the KUnit test suite into a separate patch. Changes from v9: - Rebased on top of linux-next (20200731) + kselftest/kunit and [7] - Note that the kasan_rcu_uaf test has not been ported to KUnit, and remains in test_kasan_module. This is because: (a) KUnit's expect failure will not check if the RCU stacktraces show. (b) KUnit is unable to link the failure to the test, as it occurs in an RCU callback. Changes from v8: - Rebased on top of kselftest/kunit - (Which, with this patchset, should rebase cleanly on 5.8-rc7) - Renamed the KUnit test suite, config name to patch the proposed naming guidelines for KUnit tests[6] Changes from v7: - Rebased on top of kselftest/kunit - Rebased on top of v4 of the kunit resources API[1] - Rebased on top of v4 of the FORTIFY_SOURCE fix[2,3,4] - Updated the Kconfig entry to support KUNIT_ALL_TESTS Changes from v6: - Rebased on top of kselftest/kunit - Rebased on top of Daniel Axtens' fix for FORTIFY_SOURCE incompatibilites [2] - Removed a redundant report_enabled() check. - Fixed some places with out of date Kconfig names in the documentation. Changes from v5: - Split out the panic_on_warn changes to a separate patch. - Fix documentation to fewer to the new Kconfig names. - Fix some changes which were in the wrong patch. - Rebase on top of kselftest/kunit (currently identical to 5.7-rc1) Changes from v4: - KASAN no longer will panic on errors if both panic_on_warn and kasan_multishot are enabled. - As a result, the KASAN tests will no-longer disable panic_on_warn. - This also means panic_on_warn no-longer needs to be exported. - The use of temporary "kasan_data" variables has been cleaned up somewhat. - A potential refcount/resource leak should multiple KASAN errors appear during an assertion was fixed. - Some wording changes to the KASAN test Kconfig entries. Changes from v3: - KUNIT_SET_KASAN_DATA and KUNIT_DO_EXPECT_KASAN_FAIL have been combined and included in KUNIT_DO_EXPECT_KASAN_FAIL() instead. - Reordered logic in kasan_update_kunit_status() in report.c to be easier to read. - Added comment to not use the name "kasan_data" for any kunit tests outside of KUNIT_EXPECT_KASAN_FAIL(). Changes since v2: - Due to Alan's changes in [1], KUnit can be built as a module. - The name of the tests that could not be run with KUnit has been changed to be more generic: test_kasan_module. - Documentation on how to run the new KASAN tests and what to expect when running them has been added. - Some variables and functions are now static. - Now save/restore panic_on_warn in a similar way to kasan_multi_shot and renamed the init/exit functions to be more generic to accommodate. - Due to [4] in kasan_strings, kasan_memchr, and kasan_memcmp will fail if CONFIG_AMD_MEM_ENCRYPT is enabled so return early and print message explaining this circumstance. - Changed preprocessor checks to C checks where applicable. Changes since v1: - Make use of Alan Maguire's suggestion to use his patch that allows static resources for integration instead of adding a new attribute to the kunit struct - All KUNIT_EXPECT_KASAN_FAIL statements are local to each test - The definition of KUNIT_EXPECT_KASAN_FAIL is local to the test_kasan.c file since it seems this is the only place this will be used. - Integration relies on KUnit being builtin - copy_user_test has been separated into its own file since KUnit is unable to test these. This can be run as a module just as before, using CONFIG_TEST_KASAN_USER - The addition to the current task has been separated into its own patch as this is a significant enough change to be on its own. [1] https://lore.kernel.org/linux-kselftest/CAFd5g46Uu_5TG89uOm0Dj5CMq+11cwjBnsd-k_CVy6bQUeU4Jw@mail.gmail.com/T/#t [2] https://lore.kernel.org/linux-mm/20200424145521.8203-1-dja@axtens.net/ [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=adb72ae1915db28f934e9e02c18bfcea2f3ed3b7 [4] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=47227d27e2fcb01a9e8f5958d8997cf47a820afc [5] https://bugzilla.kernel.org/show_bug.cgi?id=206337 [6] https://lore.kernel.org/linux-kselftest/20200620054944.167330-1-davidgow@google.com/ [7] https://lkml.org/lkml/2020/7/31/571 [8] https://lore.kernel.org/linux-kselftest/8d43e88e-1356-cd63-9152-209b81b16746@linuxfoundation.org/T/#u David Gow (2): kasan: test: Make KASAN KUnit test comply with naming guidelines mm: kasan: Do not panic if both panic_on_warn and kasan_multishot set Patricia Alfonso (4): Add KUnit Struct to Current Task KUnit: KASAN Integration KASAN: Port KASAN Tests to KUnit KASAN: Testing Documentation Documentation/dev-tools/kasan.rst | 70 +++ include/kunit/test.h | 5 + include/linux/kasan.h | 6 + include/linux/sched.h | 4 + lib/Kconfig.kasan | 22 +- lib/Makefile | 7 +- lib/kasan_kunit.c | 769 +++++++++++++++++++++++++ lib/kunit/test.c | 13 +- lib/test_kasan.c | 903 ------------------------------ lib/test_kasan_module.c | 111 ++++ mm/kasan/report.c | 34 +- 11 files changed, 1027 insertions(+), 917 deletions(-) create mode 100644 lib/kasan_kunit.c delete mode 100644 lib/test_kasan.c create mode 100644 lib/test_kasan_module.c