From 8540aa9e114c029f2fa27179d44183a611a753e7 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 5 Apr 2017 17:40:31 +0100 Subject: [PATCH] Prohibit PCMCIA CIS storage when the kernel is locked down Prohibit replacement of the PCMCIA Card Information Structure when the kernel is locked down. Suggested-by: Dominik Brodowski Signed-off-by: David Howells Gbp-Pq: Topic features/all/lockdown Gbp-Pq: Name 0059-Prohibit-PCMCIA-CIS-storage-when-the-kernel-is-locke.patch --- drivers/pcmcia/cistpl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c index 55ef7d1fd8d..193e4f7b73b 100644 --- a/drivers/pcmcia/cistpl.c +++ b/drivers/pcmcia/cistpl.c @@ -1578,6 +1578,11 @@ static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj, struct pcmcia_socket *s; int error; + if (kernel_is_locked_down()) { + pr_err("Direct CIS storage isn't permitted when the kernel is locked down\n"); + return -EPERM; + } + s = to_socket(container_of(kobj, struct device, kobj)); if (off) -- 2.30.2