From: Kees Cook <keescook@chromium.org>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Kees Cook <keescook@chromium.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
Nick Desaulniers <ndesaulniers@google.com>,
Leon Romanovsky <leon@kernel.org>,
Keith Busch <kbusch@kernel.org>, Len Baker <len.baker@gmx.com>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: [PATCH 0/2] overflow: Implement size_t saturating arithmetic helpers
Date: Mon, 20 Sep 2021 11:08:51 -0700 [thread overview]
Message-ID: <20210920180853.1825195-1-keescook@chromium.org> (raw)
Hi,
While doing more array_size() scans on the kernel, and reviewing recent
struct_size() work[1], it became clear we needed helpers to perform
composed saturating add and multiplies. This creates those helpers and
updates the self tests to check them.
Thanks,
-Kees
[1] https://lore.kernel.org/lkml/?q=%22open-coded+arithmetic%22
Kees Cook (2):
overflow: Implement size_t saturating arithmetic helpers
test_overflow: Regularize test reporting output
include/linux/overflow.h | 140 ++++++++++++++++++++++++---------------
lib/test_overflow.c | 111 ++++++++++++++++++++++++-------
2 files changed, 175 insertions(+), 76 deletions(-)
--
2.30.2
next reply other threads:[~2021-09-21 1:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 18:08 Kees Cook [this message]
2021-09-20 18:08 ` [PATCH 1/2] overflow: Implement size_t saturating arithmetic helpers Kees Cook
2021-09-20 22:06 ` Nick Desaulniers
2021-09-21 1:38 ` Kees Cook
2021-09-21 6:51 ` Rasmus Villemoes
2021-09-21 19:07 ` Kees Cook
2022-01-24 21:13 ` Kees Cook
2022-01-24 21:16 ` Nick Desaulniers
2022-01-25 12:58 ` Jason Gunthorpe
2021-09-20 18:08 ` [PATCH 2/2] test_overflow: Regularize test reporting output Kees Cook
2021-09-20 22:10 ` Nick Desaulniers
2021-09-21 6:56 ` Rasmus Villemoes
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