From: David Howells <dhowells@redhat.com>
Date: Wed, 8 Nov 2017 15:11:35 +0000
Subject: [20/29] Prohibit PCMCIA CIS storage when the kernel is locked down
Origin: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit?id=18b2dfc74efeafbdbb8f5d4d28da6334b7e1f1ac

Prohibit replacement of the PCMCIA Card Information Structure when the
kernel is locked down.

Suggested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-pcmcia@lists.infradead.org
---
 drivers/pcmcia/cistpl.c | 3 +++
 1 file changed, 3 insertions(+)

Index: linux/drivers/pcmcia/cistpl.c
===================================================================
--- linux.orig/drivers/pcmcia/cistpl.c
+++ linux/drivers/pcmcia/cistpl.c
@@ -1578,6 +1578,9 @@ static ssize_t pccard_store_cis(struct f
 	struct pcmcia_socket *s;
 	int error;
 
+	if (kernel_is_locked_down("Direct PCMCIA CIS storage"))
+		return -EPERM;
+
 	s = to_socket(container_of(kobj, struct device, kobj));
 
 	if (off)
