From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 19 Aug 2016 00:54:02 +0000 (-0400)
Subject: frv: fix clear_user()
X-Git-Tag: v3.2.84~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd435487db729e9485f3edcd3963fcc23054195f;p=pandora-kernel.git

frv: fix clear_user()

commit 3b8767a8f00cc6538ba6b1cf0f88502e2fd2eb90 upstream.

It should check access_ok().  Otherwise a bunch of places turn into
trivially exploitable rootholes.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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