linux-kernel - [PATCH 1/4] PCI/dwc: fix potential memory leak

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Message-ID: <20181025092229.28413-2-Zhiqiang.Hou@nxp.com>
Date:   Thu, 25 Oct 2018 09:22:35 +0000
From:   "Z.q. Hou" <zhiqiang.hou@....com>
To:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "gustavo.pimentel@...opsys.com" <gustavo.pimentel@...opsys.com>
CC:     Roy Zang <roy.zang@....com>, Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        "Z.q. Hou" <zhiqiang.hou@....com>
Subject: [PATCH 1/4] PCI/dwc: fix potential memory leak

From: Hou Zhiqiang <Zhiqiang.Hou@....com>

Free the allocated pci_host_bridge struct when failed to get
host bridge resources, and free the resource windows before
free the bridge.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 29a05759a294..ecacce016489 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -353,7 +353,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
 					&bridge->windows, &pp->io_base);
 	if (ret)
-		return ret;
+		goto error;
 
 	ret = devm_request_pci_bus_resources(dev, &bridge->windows);
 	if (ret)
@@ -502,6 +502,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	return 0;
 
 error:
+	pci_free_resource_list(&bridge->windows);
 	pci_free_host_bridge(bridge);
 	return ret;
 }
-- 
2.17.1