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| author | weiyongjun (A) <weiyongjun1@huawei.com> | 2018-01-05 04:50:59 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2018-01-11 00:24:36 +0300 |
| commit | 9d548d80384732bad74c3046329e5dbdae098104 (patch) | |
| tree | 2373e0e1db880e20502628bbe6aec11a5f20615e /drivers/clk/meson | |
| parent | 348c898cb897d6663548aada9d68c0d2d7cfba8e (diff) | |
| download | linux-9d548d80384732bad74c3046329e5dbdae098104.tar.xz | |
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/meson')
| -rw-r--r-- | drivers/clk/meson/axg.c | 2 |
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"); |