From: Pan Bian <bianpan2016@xxxxxxx> Function pci_find_ext_capability() may return 0, which is an invalid address. In function cobalt_pcie_status_show(), its return value is used without validation. This patch adds checks to validate the return address. Signed-off-by: Pan Bian <bianpan2016@xxxxxxx> --- drivers/media/pci/cobalt/cobalt-driver.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/pci/cobalt/cobalt-driver.c b/drivers/media/pci/cobalt/cobalt-driver.c index d5c911c..f8e173f 100644 --- a/drivers/media/pci/cobalt/cobalt-driver.c +++ b/drivers/media/pci/cobalt/cobalt-driver.c @@ -205,6 +205,8 @@ void cobalt_pcie_status_show(struct cobalt *cobalt) offset = pci_find_capability(pci_dev, PCI_CAP_ID_EXP); bus_offset = pci_find_capability(pci_bus_dev, PCI_CAP_ID_EXP); + if (!offset || !bus_offset) + return; /* Device */ pci_read_config_dword(pci_dev, offset + PCI_EXP_DEVCAP, &capa); -- 1.9.1
