diff options
Diffstat (limited to 'arch/alpha/kernel/pci-sysfs.c')
| -rw-r--r-- | arch/alpha/kernel/pci-sysfs.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c index 3048758304b5..21833d1c867d 100644 --- a/arch/alpha/kernel/pci-sysfs.c +++ b/arch/alpha/kernel/pci-sysfs.c @@ -11,6 +11,7 @@ */ #include <linux/sched.h> +#include <linux/security.h> #include <linux/stat.h> #include <linux/slab.h> #include <linux/pci.h> @@ -36,12 +37,16 @@ static int hose_mmap_page_range(struct pci_controller *hose, static int __pci_mmap_fits(struct pci_dev *pdev, int num, struct vm_area_struct *vma, int sparse) { + resource_size_t len = pci_resource_len(pdev, num); unsigned long nr, start, size; int shift = sparse ? 5 : 0; + if (!len) + return 0; + nr = vma_pages(vma); start = vma->vm_pgoff; - size = ((pci_resource_len(pdev, num) - 1) >> (PAGE_SHIFT - shift)) + 1; + size = ((len - 1) >> (PAGE_SHIFT - shift)) + 1; if (start < size && size - start >= nr) return 1; @@ -71,7 +76,11 @@ static int pci_mmap_resource(struct kobject *kobj, struct resource *res = attr->private; enum pci_mmap_state mmap_type; struct pci_bus_region bar; - int i; + int i, ret; + + ret = security_locked_down(LOCKDOWN_PCI_ACCESS); + if (ret) + return ret; for (i = 0; i < PCI_STD_NUM_BARS; i++) if (res == &pdev->resource[i]) |