From ec8eba8c2d4e10e77699c56918d2078210aa1339 Mon Sep 17 00:00:00 2001 From: Andrew Scull Date: Thu, 21 Apr 2022 16:11:07 +0000 Subject: [PATCH] pci: Check region ranges are addressable When parsing the `ranges` DT node, check that both extremes of the regions are addressable without overflow. This assumption can then be safely made when processing the regions. Signed-off-by: Andrew Scull Reviewed-by: Bin Meng --- drivers/pci/pci-uclass.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 8bbeb62f2e..0424cd339e 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -1013,7 +1013,22 @@ static void decode_regions(struct pci_controller *hose, ofnode parent_node, if (!IS_ENABLED(CONFIG_SYS_PCI_64BIT) && type == PCI_REGION_MEM && upper_32_bits(pci_addr)) { - debug(" - beyond the 32-bit boundary, ignoring\n"); + debug(" - pci_addr beyond the 32-bit boundary, ignoring\n"); + continue; + } + + if (!IS_ENABLED(CONFIG_PHYS_64BIT) && upper_32_bits(addr)) { + debug(" - addr beyond the 32-bit boundary, ignoring\n"); + continue; + } + + if (~((pci_addr_t)0) - pci_addr < size) { + debug(" - PCI range exceeds max address, ignoring\n"); + continue; + } + + if (~((phys_addr_t)0) - addr < size) { + debug(" - phys range exceeds max address, ignoring\n"); continue; } -- 2.39.5