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ALSA: n64: check return value after calling platform_get_resource()

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[ 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>
This commit is contained in:
Yang Yingliang 2021-06-10 20:49:58 +08:00 committed by Greg Kroah-Hartman
parent 5f9741a9a9
commit 2955c54c5b
1 changed files with 4 additions and 0 deletions
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4
sound/mips/snd-n64.c
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@ -338,6 +338,10 @@ static int __init n64audio_probe(struct platform_device *pdev)
strcpy(card->longname, "N64 Audio");
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
err = -EINVAL;
goto fail_dma_alloc;
}
if (devm_request_irq(&pdev->dev, res->start, n64audio_isr,
IRQF_SHARED, "N64 Audio", priv)) {
err = -EBUSY;