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

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Eric Paris noted that commit de139a3 ("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: Eric Paris <eparis@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Chris Wright 2011-02-10 15:58:56 -08:00 committed by James Morris
parent 6037b715d6
commit 47970b1b2a
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/pci-sysfs.c
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@ -23,6 +23,7 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/capability.h> #include <linux/capability.h>
#include <linux/security.h>
#include <linux/pci-aspm.h> #include <linux/pci-aspm.h>
#include <linux/slab.h> #include <linux/slab.h>
#include "pci.h" #include "pci.h"
@ -368,7 +369,7 @@ pci_read_config(struct file *filp, struct kobject *kobj,
u8 *data = (u8*) buf; u8 *data = (u8*) buf;
/* Several chips lock up trying to read undefined config space */ /* 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; size = dev->cfg_size;
} else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
size = 128; size = 128;