linux-kernel - [PATCH 0/4] strict user copy checks on x86

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Date:	Tue, 31 May 2011 11:14:29 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] strict user copy checks on x86_64

Andrew,

I'm sending this to you because these weren't picked up
last round and the final patch is cross architecture.

Backstory
---------
It turns out that strict user copy checks (also known as
CONFIG_DEBUG_STRICT_USER_COPY_CHECKS) isn't actually implemented
on x86_64 and thus we aren't catching potential security holes
at compile time.

This series adds support for strict user copy checks on x86_64
and silences all the benign warnings in the x86_64 allyesconfig for
linux-next 20110531.

The final patch consolidates the config option as its duplicated
across mutliple arches.

Stephen Boyd (4):
  lpfc: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning
  kprobes: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning
  x86: Implement strict user copy checks for x86_64
  Consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS

 arch/parisc/Kconfig               |    1 +
 arch/parisc/Kconfig.debug         |   14 --------------
 arch/s390/Kconfig                 |    1 +
 arch/s390/Kconfig.debug           |   14 --------------
 arch/s390/lib/Makefile            |    1 -
 arch/s390/lib/usercopy.c          |    8 --------
 arch/sparc/lib/Makefile           |    1 -
 arch/sparc/lib/usercopy.c         |    8 --------
 arch/tile/Kconfig                 |    8 +-------
 arch/tile/include/asm/uaccess.h   |    7 ++++++-
 arch/tile/lib/uaccess.c           |    8 --------
 arch/x86/Kconfig                  |    1 +
 arch/x86/Kconfig.debug            |   14 --------------
 arch/x86/include/asm/uaccess_64.h |   12 +++++++++---
 arch/x86/lib/usercopy_32.c        |    6 ------
 drivers/scsi/lpfc/lpfc_debugfs.c  |    3 ++-
 kernel/kprobes.c                  |    2 +-
 lib/Kconfig.debug                 |   18 ++++++++++++++++++
 lib/Makefile                      |    1 +
 lib/usercopy.c                    |    8 ++++++++
 20 files changed, 49 insertions(+), 87 deletions(-)
 delete mode 100644 arch/s390/lib/usercopy.c
 delete mode 100644 arch/sparc/lib/usercopy.c
 create mode 100644 lib/usercopy.c

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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