[Lucid][CVE-2013-6282][PATCH 0/1] ARM: 7527/1: uaccess: explicitly check __user pointer when !CPU_USE_DOMAINS

[Luis Henriques]

Following this email, I'm sending the backport of CVE-2013-6282 fix
for Lucid.  And it looks scary!

I believe this patch could be simplified by removing some #ifdefs
from it, as CPU_HAS_DOMAINS doesn't exist in Lucid -- it has been
added in 2.6.38 with commit 247055a ("ARM: 6384/1: Remove the domain
switching on ARMv6k/v7 CPUs").

Other than that, its just ARM assembly.  What could possibly go wrong?

Note that I've only build-tested it (for armel), as I don't have the
HW to boot it (I would say that a bad backport would break a simple
boot test).

Russell King (1):
  ARM: 7527/1: uaccess: explicitly check __user pointer when
    !CPU_USE_DOMAINS

 arch/arm/include/asm/assembler.h |  8 ++++++++
 arch/arm/include/asm/uaccess.h   | 40 +++++++++++++++++++++++++++-------------
 arch/arm/lib/getuser.S           | 23 +++++++++++++++--------
 arch/arm/lib/putuser.S           |  6 ++++++
 4 files changed, 56 insertions(+), 21 deletions(-)

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1.8.3.2