ALSA: n64: check return value after calling platform_get_resource()
[ Upstream commit be471fe332
]
It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210610124958.116142-1-yangyingliang@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -338,6 +338,10 @@ static int __init n64audio_probe(struct platform_device *pdev)
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strcpy(card->longname, "N64 Audio");
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res) {
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err = -EINVAL;
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goto fail_dma_alloc;
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}
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if (devm_request_irq(&pdev->dev, res->start, n64audio_isr,
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IRQF_SHARED, "N64 Audio", priv)) {
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err = -EBUSY;
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