tree 89c75fe87e8cf1ad288ca32b98b8e6e258eb7493
parent a937536b868b8369b98967929045f1df54234323
author CQ Tang <cq.tang@intel.com> 1363618941 -0400
committer H. Peter Anvin <hpa@linux.intel.com> 1363631523 -0700

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>