From 8e809b241695252e397bf0d7fc5f36e115c38831 Mon Sep 17 00:00:00 2001 From: Robert Marko Date: Fri, 5 Mar 2021 11:47:59 +0100 Subject: [PATCH] mwlwifi: fix PCIe DT node null pointer dereference pci_bus_to_OF_node() used to get the PCI bus DT node returns node if found or NULL if none is found. Since the return of pci_bus_to_OF_node() is not checked in the DT node name print it will cause a null pointer dereference and crash the kernel. So first check whether the node is not NULL and then print. Signed-off-by: Robert Marko --- hif/pcie/pcie.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/hif/pcie/pcie.c +++ b/hif/pcie/pcie.c @@ -570,7 +570,8 @@ static struct device_node *pcie_get_devi struct device_node *dev_node; dev_node = pci_bus_to_OF_node(pcie_priv->pdev->bus); - wiphy_info(priv->hw->wiphy, "device node: %s\n", dev_node->full_name); + if (dev_node) + wiphy_info(priv->hw->wiphy, "device node: %s\n", dev_node->full_name); return dev_node; }