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From: Kees Cook <keescook@chromium.org>
To: linux-hardening@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
	Siddhesh Poyarekar <siddhesh@gotplt.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Arnd Bergmann <arnd@arndb.de>, Juergen Gross <jgross@suse.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Tom Rix <trix@redhat.com>, Miguel Ojeda <ojeda@kernel.org>,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH 0/4] fortify: Use __builtin_dynamic_object_size() when available
Date: Tue, 20 Sep 2022 12:21:58 -0700	[thread overview]
Message-ID: <20220920192202.190793-1-keescook@chromium.org> (raw)

Hi,

This adjusts CONFIG_FORTIFY_SOURCE's coverage to include greater runtime
size checking from GCC and Clang's __builtin_dynamic_object_size(), which
the compilers can track either via code flow or from __alloc_size() hints.

Thanks,

-Kees

Kees Cook (4):
  x86/entry: Work around Clang __bdos() bug
  fortify: Explicitly check bounds are compile-time constants
  fortify: Convert to struct vs member helpers
  fortify: Use __builtin_dynamic_object_size() when available

 arch/x86/xen/enlighten_pv.c         |   3 +-
 drivers/misc/lkdtm/heap.c           |   1 +
 include/linux/compiler_attributes.h |   5 ++
 include/linux/fortify-string.h      | 125 ++++++++++++++++------------
 4 files changed, 81 insertions(+), 53 deletions(-)

-- 
2.34.1


             reply	other threads:[~2022-09-20 19:22 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-20 19:21 Kees Cook [this message]
2022-09-20 19:21 ` [PATCH 1/4] x86/entry: Work around Clang __bdos() bug Kees Cook
2022-09-21  0:07   ` Boris Ostrovsky
2022-09-20 19:22 ` [PATCH 2/4] fortify: Explicitly check bounds are compile-time constants Kees Cook
2022-09-21 11:48   ` Siddhesh Poyarekar
2022-09-22  3:46     ` Kees Cook
2022-09-20 19:22 ` [PATCH 3/4] fortify: Convert to struct vs member helpers Kees Cook
2022-09-20 19:22 ` [PATCH 4/4] fortify: Use __builtin_dynamic_object_size() when available Kees Cook
2022-09-21 11:24   ` Miguel Ojeda
2022-09-21 11:43   ` Siddhesh Poyarekar
2022-09-22  3:33     ` Kees Cook
2022-09-22 14:45       ` Siddhesh Poyarekar
2022-11-22 10:20   ` Siddhesh Poyarekar
2022-11-23  5:15     ` Kees Cook
2022-11-23 15:29       ` Siddhesh Poyarekar
2023-01-13 15:59   ` linux-next - bxnt buffer overflow in strnlen Niklas Cassel
2023-01-13 16:08     ` linux-next - bnxt " Niklas Cassel
2023-01-13 22:44       ` Kees Cook
2023-01-16 10:56         ` Niklas Cassel
2022-09-22 20:26 ` [PATCH 0/4] fortify: Use __builtin_dynamic_object_size() when available Siddhesh Poyarekar
2022-09-23  0:20   ` Kees Cook
2022-09-23  0:55     ` Siddhesh Poyarekar

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