Commit 47970b1b authored by Chris Wright's avatar Chris Wright Committed by James Morris
Browse files

pci: use security_capable() when checking capablities during config space read

Eric Paris noted that commit de139a33

 ("pci: check caps from sysfs file
open to read device dependent config space") caused the capability check
to bypass security modules and potentially auditing.  Rectify this by
calling security_capable() when checking the open file's capabilities
for config space reads.
Reported-by: default avatarEric Paris <eparis@redhat.com>
Signed-off-by: default avatarChris Wright <chrisw@sous-sol.org>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent 6037b715
......@@ -23,6 +23,7 @@
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/capability.h>
#include <linux/security.h>
#include <linux/pci-aspm.h>
#include <linux/slab.h>
#include "pci.h"
......@@ -368,7 +369,7 @@ pci_read_config(struct file *filp, struct kobject *kobj,
u8 *data = (u8*) buf;
/* Several chips lock up trying to read undefined config space */
if (cap_raised(filp->f_cred->cap_effective, CAP_SYS_ADMIN)) {
if (security_capable(filp->f_cred, CAP_SYS_ADMIN)) {
size = dev->cfg_size;
} else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
size = 128;
......
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