linux-hardening - [PATCH v2 0/4] string: Allow 2-argument strscpy()

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Message-Id: <20240205122916.it.909-kees@kernel.org>
Date: Mon,  5 Feb 2024 04:35:20 -0800
From: Kees Cook <keescook@...omium.org>
To: Andy Shevchenko <andy@...nel.org>
Cc: Kees Cook <keescook@...omium.org>,
	Richard Weinberger <richard@....at>,
	Justin Stitt <justinstitt@...gle.com>,
	Anton Ivanov <anton.ivanov@...bridgegreys.com>,
	Johannes Berg <johannes@...solutions.net>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	Jason Wang <jasowang@...hat.com>,
	kernel test robot <lkp@...el.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Azeem Shaikh <azeemshaikh38@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	linux-um@...ts.infradead.org
Subject: [PATCH v2 0/4] string: Allow 2-argument strscpy()

Hi,

v2:
 - add strscpy_pad() coverage
 - fix up ARCH=um to handle the renaming
 - use __must_be_array() to validate sizeof() usage
v1: https://lore.kernel.org/all/20240131055340.work.279-kees@kernel.org/

Make it possible for strscpy() and strscpy_pad() to use 2 arguments,
making "sizeof(dst)" be the the default 3rd argument for the destination
size. This can make future usage much easier to read. Additionally allows
treewide changes to save a bunch of lines:
 1177 files changed, 2455 insertions(+), 3026 deletions(-)

-Kees

Kees Cook (4):
  string: Redefine strscpy_pad() as a macro
  string: Allow 2-argument strscpy()
  string: Allow 2-argument strscpy_pad()
  um: Convert strscpy() usage to 2-argument style

 arch/um/drivers/net_kern.c               |  2 +-
 arch/um/drivers/vector_kern.c            |  2 +-
 arch/um/drivers/vector_user.c            |  4 +-
 arch/um/include/shared/user.h            |  3 +-
 arch/um/os-Linux/drivers/ethertap_user.c |  2 +-
 arch/um/os-Linux/drivers/tuntap_user.c   |  2 +-
 arch/um/os-Linux/umid.c                  |  6 +-
 include/linux/fortify-string.h           | 22 +------
 include/linux/string.h                   | 75 +++++++++++++++++++++++-
 lib/string.c                             |  4 +-
 lib/string_helpers.c                     | 34 -----------
 11 files changed, 87 insertions(+), 69 deletions(-)

-- 
2.34.1