linux-kernel - [PATCH v2 0/3] various strscpy fixes

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Message-ID: <1444159429-4788-1-git-send-email-cmetcalf@ezchip.com>
Date:	Tue, 6 Oct 2015 15:23:46 -0400
From:	Chris Metcalf <cmetcalf@...hip.com>
To:	Michael Cree <mcree@...on.net.nz>,
	Matt Turner <mattst88@...il.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"Rasmus Villemoes" <linux@...musvillemoes.dk>,
	Ingo Molnar <mingo@...nel.org>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
	<linux-alpha@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	Chris Metcalf <cmetcalf@...hip.com>
Subject: [PATCH v2 0/3] various strscpy fixes

This patch series fixes up a couple of architecture issues where
strscpy wasn't configured correctly (missing on h8300, duplicating
local and asm-generic copies on powerpc and tile).

It also adds a use of zero_bytemask() to the final store for
strscpy to avoid writing uninitialized data to the destination.
However, to make this work we had to add support for zero_bytemask()
to the two architectures that didn't have it (alpha and tile),
because they were providing their own local copies, but didn't
provide the zero_bytemask() that was previously only required
when building with CONFIG_DCACHE_WORD_ACCESS.

The series can be pulled from:

  git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile.git strscpy

Chris Metcalf (3):
  word-at-a-time.h: fix some Kbuild files
  word-at-a-time.h: support zero_bytemask() on alpha and tile
  strscpy: zero any trailing garbage bytes in the destination

 arch/alpha/include/asm/word-at-a-time.h | 2 ++
 arch/h8300/include/asm/Kbuild           | 1 +
 arch/powerpc/include/asm/Kbuild         | 1 -
 arch/tile/include/asm/Kbuild            | 1 -
 arch/tile/include/asm/word-at-a-time.h  | 8 +++++++-
 lib/string.c                            | 3 ++-
 6 files changed, 12 insertions(+), 4 deletions(-)

-- 
2.1.2

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