ARM: ensure the signal page contains defined contents
commit 9c698bff66ab4914bb3d71da7dc6112519bde23e upstream.
Ensure that the signal page contains our poison instruction to increase
the protection against ROP attacks and also contains well defined
contents.
Bug: 197850306
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Nobuhiro Iwamatsu (CIP) <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 8db77dca7e1d1d1d6aa9334207ead57853832bb7)
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Change-Id: I018db4646b4ed3a04497f8bd512a78289b0ad85c
1 file changed