From 9903e41ae1f5d50c93f268ca3304d4d7c64b9311 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 4 Jan 2018 06:36:34 +0000 Subject: clk: hisilicon: hi3660：Fix potential NULL dereference in hi3660_stub_clk_probe() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit platform_get_resource() may return NULL, add proper check to avoid potential NULL dereferencing. This is detected by Coccinelle semantic patch. @@ expression pdev, res, n, t, e, e1, e2; @@ res = platform_get_resource(pdev, t, n); + if (!res) + return -EINVAL; ... when != res == NULL e = devm_ioremap(e1, res->start, e2); Fixes: 4f16f7ff3bc0 ("clk: hisilicon: Add support for Hi3660 stub clocks") Signed-off-by: Wei Yongjun Signed-off-by: Stephen Boyd --- drivers/clk/hisilicon/clk-hi3660-stub.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/clk/hisilicon') diff --git a/drivers/clk/hisilicon/clk-hi3660-stub.c b/drivers/clk/hisilicon/clk-hi3660-stub.c index 9b6c72bbddf9..e8b2c43b1bb8 100644 --- a/drivers/clk/hisilicon/clk-hi3660-stub.c +++ b/drivers/clk/hisilicon/clk-hi3660-stub.c @@ -149,6 +149,8 @@ static int hi3660_stub_clk_probe(struct platform_device *pdev) return PTR_ERR(stub_clk_chan.mbox); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; freq_reg = devm_ioremap(dev, res->start, resource_size(res)); if (!freq_reg) return -ENOMEM; -- cgit v1.2.3-59-g8ed1b