Commit 9d548d80 authored Jan 05, 2018 by weiyongjun (A) Committed by Stephen Boyd Jan 10, 2018

clk: meson-axg: fix potential NULL dereference in axg_clkc_probe()



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);

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

parent 348c898c

drivers/clk/meson/axg.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -879,6 +879,8 @@ static int axg_clkc_probe(struct platform_device *pdev)

		/* Generic clocks and PLLs */
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res)
		return -EINVAL;
		clk_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
		if (!clk_base) {
		dev_err(&pdev->dev, "Unable to map clk base\n");