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Date: Mon, 18 Mar 2019 19:26:30 -0500 From: Aditya Pakki <pakki001@....edu> To: pakki001@....edu Cc: kjlu@....edu, Will Deacon <will.deacon@....com>, Lorenzo Pieralisi <lorenzo.pieralisi@....com>, Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH] PCI: Fix to avoid potential NULL pointer dereference In gen_pci_probe, of_match_node can return a NULL pointer in case of failure. The patch avoids a NULL pointer dereference in such a scenario. Signed-off-by: Aditya Pakki <pakki001@....edu> --- drivers/pci/controller/pci-host-generic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/controller/pci-host-generic.c b/drivers/pci/controller/pci-host-generic.c index dea3ec7592a2..85f473f50e96 100644 --- a/drivers/pci/controller/pci-host-generic.c +++ b/drivers/pci/controller/pci-host-generic.c @@ -83,6 +83,8 @@ static int gen_pci_probe(struct platform_device *pdev) struct pci_ecam_ops *ops; of_id = of_match_node(gen_pci_of_match, pdev->dev.of_node); + if (!of_id) + return -ENXIO; ops = (struct pci_ecam_ops *)of_id->data; return pci_host_common_probe(pdev, ops); -- 2.17.1
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