4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 4be1eaf322f07bb9694618fd2763a3a1f0a3dd25 ]
devm_kasprintf() may return NULL on failure of internal allocation thus the assignment to .label is not safe if not checked. On error npcm7xx_gpio_of() returns negative values so -ENOMEM in the (unlikely) failure case of devm_kasprintf() should be fine here.
Signed-off-by: Nicholas Mc Guire hofrat@osadl.org Fixes: 3b588e43ee5c ("pinctrl: nuvoton: add NPCM7xx pinctrl and GPIO driver") Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c index 7ad50d9268aa..3bda620d18bb 100644 --- a/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c +++ b/drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c @@ -1932,6 +1932,9 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl) pctrl->gpio_bank[id].gc.label = devm_kasprintf(pctrl->dev, GFP_KERNEL, "%pOF", np); + 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;