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PCI: Restrict VPD read permission to root

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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>
This commit is contained in:
Ben Hutchings 2008-07-01 17:18:17 +01:00 committed by Jesse Barnes
parent 543cf4cb3f
commit a94c248113
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci-sysfs.c
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@ -738,7 +738,7 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
pdev->vpd->attr = attr; pdev->vpd->attr = attr;
attr->size = pdev->vpd->ops->get_size(pdev); attr->size = pdev->vpd->ops->get_size(pdev);
attr->attr.name = "vpd"; attr->attr.name = "vpd";
attr->attr.mode = S_IRUGO | S_IWUSR; attr->attr.mode = S_IRUSR | S_IWUSR;
attr->read = pci_read_vpd; attr->read = pci_read_vpd;
attr->write = pci_write_vpd; attr->write = pci_write_vpd;
retval = sysfs_create_bin_file(&pdev->dev.kobj, attr); retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);