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authorweiyongjun (A) <weiyongjun1@huawei.com>2018-01-05 01:50:59 +0000
committerStephen Boyd <sboyd@codeaurora.org>2018-01-10 13:24:36 -0800
commit9d548d80384732bad74c3046329e5dbdae098104 (patch)
tree2373e0e1db880e20502628bbe6aec11a5f20615e /drivers/clk
parent348c898cb897d6663548aada9d68c0d2d7cfba8e (diff)
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>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/meson/axg.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c
index d883bef49eb7..1294f3ad7cd5 100644
--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -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");

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