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;
