tree c4384793a4ee80397cd083f0f29b704eb2bdcfb6
parent eb47e0293baaa3044022059f1fa9ff474bfe35cb
author Al Viro <viro@zeniv.linux.org.uk> 1471568042 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1473803379 -0400

frv: fix clear_user()

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

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>