linux-kernel - [PATCH 4/8] clk: si5341: check return value of {devm

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Message-ID: <20230530093913.1656095-5-claudiu.beznea@microchip.com>
Date:   Tue, 30 May 2023 12:39:09 +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 4/8] clk: si5341: check return value of {devm_}kasprintf()

{devm_}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: 3044a860fd09 ("clk: Add Si5341/Si5340 driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/clk/clk-si5341.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/clk-si5341.c b/drivers/clk/clk-si5341.c
index 6dca3288c894..b2cf7edc8b30 100644
--- a/drivers/clk/clk-si5341.c
+++ b/drivers/clk/clk-si5341.c
@@ -1697,6 +1697,10 @@ static int si5341_probe(struct i2c_client *client)
 	for (i = 0; i < data->num_synth; ++i) {
 		synth_clock_names[i] = devm_kasprintf(&client->dev, GFP_KERNEL,
 				"%s.N%u", client->dev.of_node->name, i);
+		if (!synth_clock_names[i]) {
+			err = -ENOMEM;
+			goto free_clk_names;
+		}
 		init.name = synth_clock_names[i];
 		data->synth[i].index = i;
 		data->synth[i].data = data;
@@ -1715,6 +1719,10 @@ static int si5341_probe(struct i2c_client *client)
 	for (i = 0; i < data->num_outputs; ++i) {
 		init.name = kasprintf(GFP_KERNEL, "%s.%d",
 			client->dev.of_node->name, i);
+		if (!init.name) {
+			err = -ENOMEM;
+			goto free_clk_names;
+		}
 		init.flags = config[i].synth_master ? CLK_SET_RATE_PARENT : 0;
 		data->clk[i].index = i;
 		data->clk[i].data = data;
-- 
2.34.1