Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Claudiu Beznea <claudiu.beznea@microchip.com>
To:     <mturquette@baylibre.com>, <sboyd@kernel.org>,
        <luca.ceresoli@bootlin.com>, <nm@ti.com>, <kristo@kernel.org>,
        <ssantosh@kernel.org>, <michal.simek@xilinx.com>
CC:     <aford173@gmail.com>, <mike.looijmans@topic.nl>,
        <robert.hancock@calian.com>, <shawn.guo@linaro.org>,
        <fabio.estevam@freescale.com>, <linux-clk@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-omap@vger.kernel.org>,
        Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH 2/8] clk: cdce925: check return value of kasprintf()
Date:   Tue, 30 May 2023 12:39:07 +0300
Message-ID: <20230530093913.1656095-3-claudiu.beznea@microchip.com>
In-Reply-To: <20230530093913.1656095-1-claudiu.beznea@microchip.com>
References: <20230530093913.1656095-1-claudiu.beznea@microchip.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Precedence: bulk

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: 19fbbbbcd3a3 ("Add TI CDCE925 I2C controlled clock synthesizer driver")
Depends-on: e665f029a283 ("clk: Convert to using %pOFn instead of device_node.name")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 drivers/clk/clk-cdce925.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/clk-cdce925.c b/drivers/clk/clk-cdce925.c
index 6350682f7e6d..87890669297d 100644
--- a/drivers/clk/clk-cdce925.c
+++ b/drivers/clk/clk-cdce925.c
@@ -701,6 +701,10 @@ static int cdce925_probe(struct i2c_client *client)
 	for (i = 0; i < data->chip_info->num_plls; ++i) {
 		pll_clk_name[i] = kasprintf(GFP_KERNEL, "%pOFn.pll%d",
 			client->dev.of_node, i);
+		if (!pll_clk_name[i]) {
+			err = -ENOMEM;
+			goto error;
+		}
 		init.name = pll_clk_name[i];
 		data->pll[i].chip = data;
 		data->pll[i].hw.init = &init;
@@ -742,6 +746,10 @@ static int cdce925_probe(struct i2c_client *client)
 	init.num_parents = 1;
 	init.parent_names = &parent_name; /* Mux Y1 to input */
 	init.name = kasprintf(GFP_KERNEL, "%pOFn.Y1", client->dev.of_node);
+	if (!init.name) {
+		err = -ENOMEM;
+		goto error;
+	}
 	data->clk[0].chip = data;
 	data->clk[0].hw.init = &init;
 	data->clk[0].index = 0;
@@ -760,6 +768,10 @@ static int cdce925_probe(struct i2c_client *client)
 	for (i = 1; i < data->chip_info->num_outputs; ++i) {
 		init.name = kasprintf(GFP_KERNEL, "%pOFn.Y%d",
 			client->dev.of_node, i+1);
+		if (!init.name) {
+			err = -ENOMEM;
+			goto error;
+		}
 		data->clk[i].chip = data;
 		data->clk[i].hw.init = &init;
 		data->clk[i].index = i;
-- 
2.34.1