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b1a7f99967
Many functions in PCI use accessor macros such as pci_resource_len(), which take a BAR index. That index, however, is never checked for validity, potentially resulting in undefined behavior by overflowing the array pci_dev.resource in the macro pci_resource_n(). Since many users of those macros directly assign the accessed value to an unsigned integer, the macros cannot be changed easily anymore to return -EINVAL for invalid indexes. Consequently, the problem has to be mitigated in higher layers. Add pci_bar_index_valid(). Use it where appropriate. Link: https://lore.kernel.org/r/20250312080634.13731-4-phasta@kernel.org Closes: https://lore.kernel.org/all/adb53b1f-29e1-3d14-0e61-351fd2d3ff0d@linux.intel.com/ Reported-by: Bingbu Cao <bingbu.cao@linux.intel.com> Signed-off-by: Philipp Stanner <phasta@kernel.org> [kwilczynski: correct if-statement condition the pci_bar_index_is_valid() helper function uses, tidy up code comments] Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> [bhelgaas: fix typo] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
1027 lines
26 KiB
1027 lines
26 KiB