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authorDavid Howells <dhowells@redhat.com>2019-08-19 17:17:53 -0700
committerJames Morris <jmorris@namei.org>2019-08-19 21:54:16 -0700
commit3f19cad3fa0d0fff18ee126f03a80420ae7bcbc9 (patch)
tree68225b93a0b22cfd1846c9d5416566ed3cf5455f /drivers/pcmcia
parent6ea0e815fc5e18597724169caa6e4d46dd8e693d (diff)
downloadlinux-3f19cad3fa0d0fff18ee126f03a80420ae7bcbc9.tar.bz2
lockdown: 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 <linux@dominikbrodowski.net> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Matthew Garrett <mjg59@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/pcmcia')
-rw-r--r--drivers/pcmcia/cistpl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index abd029945cc8..629359fe3513 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -21,6 +21,7 @@
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/io.h>
+#include <linux/security.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
@@ -1575,6 +1576,10 @@ static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj,
struct pcmcia_socket *s;
int error;
+ error = security_locked_down(LOCKDOWN_PCMCIA_CIS);
+ if (error)
+ return error;
+
s = to_socket(container_of(kobj, struct device, kobj));
if (off)