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[73.242.25.233]) by smtp.googlemail.com with ESMTPSA id w6sm4729538iom.22.2019.03.18.17.26.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 Mar 2019 17:26:34 -0700 (PDT) From: Aditya Pakki To: pakki001@umn.edu Subject: [PATCH] PCI: Fix to avoid potential NULL pointer dereference Date: Mon, 18 Mar 2019 19:26:30 -0500 Message-Id: <20190319002630.12485-1-pakki001@umn.edu> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190318_172640_387463_FC8DCC54 X-CRM114-Status: GOOD ( 11.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , kjlu@umn.edu, Will Deacon , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Bjorn Helgaas , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- 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);