linux-kernel - [PATCH 7/8] clk: ti: clkctrl: check return value of kasprintf()

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Message-ID: <20230530093913.1656095-8-claudiu.beznea@microchip.com>
Date:   Tue, 30 May 2023 12:39:12 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <luca.ceresoli@...tlin.com>, <nm@...com>, <kristo@...nel.org>,
        <ssantosh@...nel.org>, <michal.simek@...inx.com>
CC:     <aford173@...il.com>, <mike.looijmans@...ic.nl>,
        <robert.hancock@...ian.com>, <shawn.guo@...aro.org>,
        <fabio.estevam@...escale.com>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-omap@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH 7/8] clk: ti: clkctrl: check return value of kasprintf()

kasprintf() returns a pointer to dynamically allocated memory.
Pointer could be NULL in case allocation fails. Check pointer validity.
Identified with coccinelle (kmerr.cocci script).

Fixes: 852049594b9a ("clk: ti: clkctrl: convert subclocks to use proper names also")
Fixes: 6c3090520554 ("clk: ti: clkctrl: Fix hidden dependency to node name")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/clk/ti/clkctrl.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/clk/ti/clkctrl.c b/drivers/clk/ti/clkctrl.c
index b6fce916967c..8c40f10280b7 100644
--- a/drivers/clk/ti/clkctrl.c
+++ b/drivers/clk/ti/clkctrl.c
@@ -258,6 +258,9 @@ static const char * __init clkctrl_get_clock_name(struct device_node *np,
 	if (clkctrl_name && !legacy_naming) {
 		clock_name = kasprintf(GFP_KERNEL, "%s-clkctrl:%04x:%d",
 				       clkctrl_name, offset, index);
+		if (!clock_name)
+			return NULL;
+
 		strreplace(clock_name, '_', '-');
 
 		return clock_name;
@@ -586,6 +589,10 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
 	if (clkctrl_name) {
 		provider->clkdm_name = kasprintf(GFP_KERNEL,
 						 "%s_clkdm", clkctrl_name);
+		if (!provider->clkdm_name) {
+			kfree(provider);
+			return;
+		}
 		goto clkdm_found;
 	}
 
-- 
2.34.1