From 4797489ce83a5f42d0b38089695a48d4a3d1ee0b Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Tue, 21 Jul 2015 15:42:59 +0100
Subject: [PATCH] x86_64: Fix strnlen_user() to not touch memory after
 specified maximum

Inspired by commit f18c34e483ff ("lib: Fix strnlen_user() to not touch
memory after specified maximum") upstream.  This version of
strnlen_user(), no longer present upstream, has a similar off-by-one
error.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Jan Kara <jack@suse.cz>
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