hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8XWD4 CVE: NA

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We use 'bir' as the index of array resource[DEVICE_COUNT_RESOURCE]. Wrong 'bir' will cause access out of range. This patch add a check for 'bir'.

Signed-off-by: Xiongfeng Wang wangxiongfeng2@huawei.com Reviewed-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Jialin Zhang zhangjialin11@huawei.com Conflicts: drivers/pci/msi.c Signed-off-by: Xiongfeng Wang wangxiongfeng2@huawei.com --- drivers/pci/msi/msi.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index ef1d8857a51b..21355bfe58a3 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -559,6 +559,11 @@ static void __iomem *msix_map_region(struct pci_dev *dev, pci_read_config_dword(dev, dev->msix_cap + PCI_MSIX_TABLE, &table_offset); bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR); + if (bir >= DEVICE_COUNT_RESOURCE) { + dev_err(&dev->dev, "MSI-X Table BIR is out of range !\n"); + return NULL; + } + flags = pci_resource_flags(dev, bir); if (!flags || (flags & IORESOURCE_UNSET)) return NULL;