From dc63fbe3062bdc1ba0cebfc72627bfc0eefaf2e1 Mon Sep 17 00:00:00 2001 From: Xiongfeng Wang Date: Mon, 22 Jan 2024 11:14:57 +0800 Subject: [PATCH] PCI: Fail MSI-X mapping if MSI-X Table offset is out of range of BAR space euler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8XWBL CVE: NA ---------------------------------------- This patch add check for the offset of MSI-X Table. If it is out of range of the BAR space BIR selects, we just fail this MSI-X mapping. Signed-off-by: Xiongfeng Wang Reviewed-by: Hanjun Guo Signed-off-by: Jialin Zhang Conflicts: drivers/pci/msi.c Signed-off-by: Xiongfeng Wang --- drivers/pci/msi/msi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index ef1d8857a51b..c292e5be6202 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -564,6 +564,12 @@ static void __iomem *msix_map_region(struct pci_dev *dev, return NULL; table_offset &= PCI_MSIX_TABLE_OFFSET; + if (table_offset >= pci_resource_len(dev, bir)) { + dev_err(&dev->dev, + "MSI-X Table offset is out of range of BAR:%d!\n", + bir); + return NULL; + } phys_addr = pci_resource_start(dev, bir) + table_offset; return ioremap(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE); -- Gitee