From: Jan Beulich <JBeulich@suse.com>
Date: Fri, 7 Sep 2012 06:54:52 +0000 (+0100)
Subject: x86/mm: Fix range check in tlbflush debugfs interface
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~84^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d4c9dbc61fe0ca042b835c6f234af12fa5f18310;p=pandora-kernel.git

x86/mm: Fix range check in tlbflush debugfs interface

Since the shift count settable there is used for shifting values
of type "unsigned long", its value must not match or exceed
BITS_PER_LONG (otherwise the shift operations are undefined).

Similarly, the value must not be negative (but -1 must be
permitted, as that's the value used to distinguish the case of
the fine grained flushing being disabled).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Alex Shi <alex.shi@intel.com>
Link: http://lkml.kernel.org/r/5049B65C020000780009990C@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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