4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit db221412cd2014506642967155698825ad80f6b6 ]
devm_kasprintf() may return NULL on failure of internal allocation thus the assignments are not safe if not checked. On error rza1_pinctrl_register() respectively rza1_parse_gpiochip() return 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: 5a49b644b307 ("pinctrl: Renesas RZ/A1 pin and gpio controller") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/pinctrl-rza1.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-rza1.c b/drivers/pinctrl/pinctrl-rza1.c index 14eb576c04a2..9cfe9d0520ac 100644 --- a/drivers/pinctrl/pinctrl-rza1.c +++ b/drivers/pinctrl/pinctrl-rza1.c @@ -1225,6 +1225,9 @@ static int rza1_parse_gpiochip(struct rza1_pinctrl *rza1_pctl, chip->base = -1; chip->label = devm_kasprintf(rza1_pctl->dev, GFP_KERNEL, "%pOFn", np); + if (!chip->label) + return -ENOMEM; + chip->ngpio = of_args.args[2]; chip->of_node = np; chip->parent = rza1_pctl->dev; @@ -1326,6 +1329,8 @@ static int rza1_pinctrl_register(struct rza1_pinctrl *rza1_pctl) pins[i].number = i; pins[i].name = devm_kasprintf(rza1_pctl->dev, GFP_KERNEL, "P%u-%u", port, pin); + if (!pins[i].name) + return -ENOMEM;
if (i % RZA1_PINS_PER_PORT == 0) { /*