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pinctrl: stm32: check devm_kasprintf() returned value 

commit b0f0e3f0552a566def55c844b0d44250c58e4df6 upstream.

devm_kasprintf() can return a NULL pointer on failure but this returned
value is not checked. Fix this lack and check the returned value.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: 32c170ff15 ("pinctrl: stm32: set default gpio line names using pin names")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://lore.kernel.org/20240906100326.624445-1-make24@iscas.ac.cn
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ma Ke 2024-09-06 18:03:26 +08:00 committed by Greg Kroah-Hartman
parent 20728e8628
commit 3b36bb1fca
1 changed files with 7 additions and 2 deletions
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9
drivers/pinctrl/stm32/pinctrl-stm32.c
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@ -1387,11 +1387,16 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
for (i = 0; i < npins; i++) { for (i = 0; i < npins; i++) {
stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i); stm32_pin = stm32_pctrl_get_desc_pin_from_gpio(pctl, bank, i);
if (stm32_pin && stm32_pin->pin.name) if (stm32_pin && stm32_pin->pin.name) {
names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name); names[i] = devm_kasprintf(dev, GFP_KERNEL, "%s", stm32_pin->pin.name);
else if (!names[i]) {
err = -ENOMEM;
goto err_clk;
}
} else {
names[i] = NULL; names[i] = NULL;
} }
}
bank->gpio_chip.names = (const char * const *)names; bank->gpio_chip.names = (const char * const *)names;