PCI: Restrict VPD read permission to root

Some PCI devices will lock up if we attempt to read from VPD addresses
beyond some device-dependent limit.  Until we can identify these
devices and adjust the file size accordingly, only let root read VPD
through sysfs to prevent a DoS by normal users.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 6f3c7446c329..1f855f028e92 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -738,7 +738,7 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
                         pdev->vpd->attr = attr;
                         attr->size = pdev->vpd->ops->get_size(pdev);
                         attr->attr.name = "vpd";
-                        attr->attr.mode = S_IRUGO | S_IWUSR;
+                        attr->attr.mode = S_IRUSR | S_IWUSR;
                         attr->read = pci_read_vpd;
                         attr->write = pci_write_vpd;
                         retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);