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Merge branch 'pci/resource'

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- Restructure pci_dev_for_each_resource() to avoid computing the address of
  an out-of-bounds array element (the bounds check was performed later so
  the element was never actually *read*, but it's nicer to avoid even
  computing an out-of-bounds address) (Andy Shevchenko)

* pci/resource:
  PCI: Avoid potential out-of-bounds read in pci_dev_for_each_resource()
This commit is contained in:
Bjorn Helgaas 2024-01-15 12:10:35 -06:00
commit 5a4af2ca48
1 changed files with 6 additions and 6 deletions
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12
include/linux/pci.h
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@ -2127,14 +2127,14 @@ int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
(pci_resource_end((dev), (bar)) ? \
resource_size(pci_resource_n((dev), (bar))) : 0)
#define __pci_dev_for_each_res0(dev, res, ...) \
for (unsigned int __b = 0; \
res = pci_resource_n(dev, __b), __b < PCI_NUM_RESOURCES; \
#define __pci_dev_for_each_res0(dev, res, ...) \
for (unsigned int __b = 0; \
__b < PCI_NUM_RESOURCES && (res = pci_resource_n(dev, __b)); \
__b++)
#define __pci_dev_for_each_res1(dev, res, __b) \
for (__b = 0; \
res = pci_resource_n(dev, __b), __b < PCI_NUM_RESOURCES; \
#define __pci_dev_for_each_res1(dev, res, __b) \
for (__b = 0; \
__b < PCI_NUM_RESOURCES && (res = pci_resource_n(dev, __b)); \
__b++)
#define pci_dev_for_each_resource(dev, res, ...) \