linux-hardening - [PATCH 0/9] fortify: Add KUnit tests for runtime overflows

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Message-Id: <20230405235832.never.487-kees@kernel.org>
Date:   Wed,  5 Apr 2023 17:01:59 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-hardening@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>,
        Andy Shevchenko <andy@...nel.org>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Puyou Lu <puyou.lu@...il.com>, Mark Brown <broonie@...nel.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        David Gow <davidgow@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Alexander Potapenko <glider@...gle.com>,
        Zhaoyang Huang <zhaoyang.huang@...soc.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Liam Howlett <liam.howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Yury Norov <yury.norov@...il.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Sander Vanheule <sander@...nheule.net>,
        Eric Biggers <ebiggers@...gle.com>,
        "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Daniel Latypov <dlatypov@...gle.com>,
        José Expósito <jose.exposito89@...il.com>,
        linux-kernel@...r.kernel.org, kunit-dev@...glegroups.com
Subject: [PATCH 0/9] fortify: Add KUnit tests for runtime overflows

Hi,

This series adds KUnit tests for the CONFIG_FORTIFY_SOURCE behavior of the
standard C string functions, and for the strcat() family of functions,
as those were updated during refactoring. Finally, fortification error
messages are improved to give more context for the failure condition.

-Kees

Kees Cook (9):
  kunit: tool: Enable CONFIG_FORTIFY_SOURCE under UML
  fortify: Allow KUnit test to build without FORTIFY
  string: Add Kunit tests for strcat() family
  fortify: Add protection for strlcat()
  fortify: strcat: Move definition to use fortified strlcat()
  fortify: Split reporting and avoid passing string pointer
  fortify: Provide KUnit counters for failure testing
  fortify: Add KUnit tests for runtime overflows
  fortify: Improve buffer overflow reporting

 MAINTAINERS                                  |   1 +
 include/linux/fortify-string.h               | 204 +++--
 lib/Kconfig.debug                            |   7 +-
 lib/Makefile                                 |   1 +
 lib/fortify_kunit.c                          | 795 +++++++++++++++++++
 lib/strcat_kunit.c                           | 100 +++
 lib/string_helpers.c                         |  74 +-
 tools/objtool/check.c                        |   2 +-
 tools/testing/kunit/configs/all_tests.config |   2 +
 tools/testing/kunit/configs/arch_uml.config  |   3 +
 10 files changed, 1133 insertions(+), 56 deletions(-)
 create mode 100644 lib/strcat_kunit.c

-- 
2.34.1