6.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Charles Han <hanchunchao@xxxxxxxxxx>
[ Upstream commit acf40ab42799e4ae1397ee6f5c5941092d66f999 ]
devm_kasprintf() calls can return null pointers on failure.
But the return values were not checked in npcm8xx_gpio_fw().
Add NULL check in npcm8xx_gpio_fw(), to handle kernel NULL
pointer dereference error.
Fixes: acf4884a5717 ("pinctrl: nuvoton: add NPCM8XX pinctrl and GPIO driver")
Signed-off-by: Charles Han <hanchunchao@xxxxxxxxxx>
Link: https://lore.kernel.org/20250212100532.4317-1-hanchunchao@xxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
index 471f644c5eef2..d09a5e9b2eca5 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c
@@ -2374,6 +2374,9 @@ static int npcm8xx_gpio_fw(struct npcm8xx_pinctrl *pctrl)
pctrl->gpio_bank[id].gc.parent = dev;
pctrl->gpio_bank[id].gc.fwnode = child;
pctrl->gpio_bank[id].gc.label = devm_kasprintf(dev, GFP_KERNEL, "%pfw", child);
+ if (pctrl->gpio_bank[id].gc.label == NULL)
+ return -ENOMEM;
+
pctrl->gpio_bank[id].gc.dbg_show = npcmgpio_dbg_show;
pctrl->gpio_bank[id].direction_input = pctrl->gpio_bank[id].gc.direction_input;
pctrl->gpio_bank[id].gc.direction_input = npcmgpio_direction_input;
--
2.39.5
