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- From 8e809b241695252e397bf0d7fc5f36e115c38831 Mon Sep 17 00:00:00 2001
- From: Robert Marko <[email protected]>
- 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 <[email protected]>
- ---
- hif/pcie/pcie.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
- --- a/hif/pcie/pcie.c
- +++ b/hif/pcie/pcie.c
- @@ -685,7 +685,8 @@ 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;
- }
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