clk-sunxi: fix a missing-check bug in sunxi_divs_clk_setup()

In sunxi_divs_clk_setup(), 'derived_name' is allocated by kstrndup().
It returns NULL when fails. 'derived_name' should be checked.

Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index f5b1c00..830bfb7 100644 (file)
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -989,6 +989,8 @@ static struct clk ** __init sunxi_divs_clk_setup(struct device_node *node,
                if (endp) {
                        derived_name = kstrndup(clk_name, endp - clk_name,
                                                GFP_KERNEL);
+                       if (!derived_name)
+                               return NULL;
                        factors.name = derived_name;
                } else {
                        factors.name = clk_name;