[PATCH 6.4 417/800] clk: cdce925: check return value of kasprintf()

Greg Kroah-Hartman
2023-07-16T20:12:24Z

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

[ Upstream commit bb7d09ddbf361d51eae46f38e7c8a2b85914ea2a ]

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>
Link: https://lore.kernel.org/r/20230530093913.1656095-3-claudiu.beznea@microchip.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 6350682f7e6d2..87890669297d8 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;
--
2.39.2