From: CQ Tang <cq.tang@intel.com>
Date: Mon, 18 Mar 2013 15:02:21 +0000 (-0400)
Subject: x86-64: Fix the failure case in copy_user_handle_tail()
X-Git-Tag: v3.9-rc5~36^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66db3feb486c01349f767b98ebb10b0c3d2d021b;p=pandora-kernel.git

x86-64: Fix the failure case in copy_user_handle_tail()

The increment of "to" in copy_user_handle_tail() will have incremented
before a failure has been noted.  This causes us to skip a byte in the
failure case.

Only do the increment when assured there is no failure.

Signed-off-by: CQ Tang <cq.tang@intel.com>
Link: http://lkml.kernel.org/r/20130318150221.8439.993.stgit@phlsvslse11.ph.intel.com
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org>
---

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