[PATCH 18/27] Prohibit PCMCIA CIS storage when the kernel is locked down

[Matthew Garrett]

From: David Howells <dhowe...@redhat.com>

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

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

diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index ac0672b8dfca..8adf092d0e18 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -1578,6 +1578,9 @@ static ssize_t pccard_store_cis(struct file *filp, struct 
kobject *kobj,
        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)
-- 
2.21.0.352.gf09ad66450-goog