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gpio: grgpio: Add NULL check in grgpio_probe

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[ Upstream commit 050b23d081da0f29474de043e9538c1f7a351b3b ]

devm_kasprintf() can return a NULL pointer on failure,but this
returned value in grgpio_probe is not checked.
Add NULL check in grgpio_probe, to handle kernel NULL
pointer dereference error.

Cc: stable@vger.kernel.org
Fixes: 7eb6ce2f2723 ("gpio: Convert to using %pOF instead of full_name")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Link: https://lore.kernel.org/r/20241114091822.78199-1-hanchunchao@inspur.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Charles Han 2024-11-14 17:18:22 +08:00 committed by Ksawlii
parent 9e9f831a8d
commit a45ced812e
1 changed files with 3 additions and 0 deletions
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3
drivers/gpio/gpio-grgpio.c
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@ -363,6 +363,9 @@ static int grgpio_probe(struct platform_device *ofdev)
gc->owner = THIS_MODULE; gc->owner = THIS_MODULE;
gc->to_irq = grgpio_to_irq; gc->to_irq = grgpio_to_irq;
gc->label = devm_kasprintf(dev, GFP_KERNEL, "%pOF", np); gc->label = devm_kasprintf(dev, GFP_KERNEL, "%pOF", np);
if (!gc->label)
return -ENOMEM;
gc->base = -1; gc->base = -1;
err = of_property_read_u32(np, "nbits", &prop); err = of_property_read_u32(np, "nbits", &prop);