From d6746db1a3415945ca302d5ca93cf8a7709b5ee0 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 8 Nov 2017 15:11:35 +0000 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 cc: linux-pcmcia@lists.infradead.org Gbp-Pq: Topic features/all/lockdown Gbp-Pq: Name 0020-Prohibit-PCMCIA-CIS-storage-when-the-kernel-is-locke.patch --- drivers/pcmcia/cistpl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c index 102646fedb5..e46c948d724 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) -- 2.30.2