linux-hardening - [PATCH 0/2] fortify: Add run-time WARN for cross-field memcpy()

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Message-Id: <20220901065914.1417829-1-keescook@chromium.org>
Date:   Wed, 31 Aug 2022 23:59:12 -0700
From:   Kees Cook <keescook@...omium.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-hardening@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: [PATCH 0/2] fortify: Add run-time WARN for cross-field memcpy()

Hi,

I'm hoping to at least get this into -next to see how noisy it ends up
being. I've tracked down several false positives that are getting fixed,
but I'd like to see this get wider testing. For details, see patch 1,
but this is the run-time half of the recent FORTIFY_SOURCE memcpy()
bounds checking work.

-Kees

Kees Cook (2):
  fortify: Add run-time WARN for cross-field memcpy()
  lkdtm: Update tests for memcpy() run-time warnings

 drivers/misc/lkdtm/fortify.c            | 96 +++++++++++++++++++++----
 include/linux/fortify-string.h          | 70 +++++++++++++++++-
 tools/testing/selftests/lkdtm/tests.txt |  8 ++-
 3 files changed, 155 insertions(+), 19 deletions(-)

-- 
2.34.1