This is a note to let you know that I've just added the patch titled ALSA: n64: check return value after calling platform_get_resource() to the 5.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: alsa-n64-check-return-value-after-calling-platform_g.patch and it can be found in the queue-5.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit c0ae31039d997fdc5b645a6827d5f4bc98c35a15 Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Thu Jun 10 20:49:58 2021 +0800 ALSA: n64: check return value after calling platform_get_resource() [ Upstream commit be471fe332f7f14aa6828010b220d7e6902b91a0 ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210610124958.116142-1-yangyingliang@xxxxxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/sound/mips/snd-n64.c b/sound/mips/snd-n64.c index e35e93157755..463a6fe589eb 100644 --- a/sound/mips/snd-n64.c +++ b/sound/mips/snd-n64.c @@ -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;