[PATCH 6.4 419/800] clk: si5341: check return value of {devm_}kasprintf()

Greg Kroah-Hartman
2023-07-16T20:12:30Z

From: Claudiu Beznea <claudiu.beznea@microchip.com>

[ Upstream commit 36e4ef82016a2b785cf2317eade77e76699b7bff ]

{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@microchip.com>
Link: https://lore.kernel.org/r/20230530093913.1656095-5-claudiu.beznea@microchip.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 6dca3288c8940..b2cf7edc8b308 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;
--
2.39.2