release/5.2.22/clk-sunxi-fix-a-missing-check-bug-in-sunxi_divs_clk_.patch

From f0d033d59d6b9967a923119c882132e114f4e625 Mon Sep 17 00:00:00 2001
From: Gen Zhang <blackgod016574@gmail.com>
Date: Tue, 28 May 2019 10:18:51 +0800
Subject: [PATCH] clk-sunxi: fix a missing-check bug in sunxi_divs_clk_setup()

commit fcdf445ff42f036d22178b49cf64e92d527c1330 upstream.

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>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index 623fda5e911f..d3a43381a792 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -980,6 +980,8 @@ 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;
-- 
2.7.4