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From: Yang Yingliang <yangyingliang@huawei.com>
To: <linux-kernel@vger.kernel.org>, <alsa-devel@alsa-project.org>
Cc: <tiwai@suse.com>
Subject: [PATCH -next] ALSA: n64: check return value after calling platform_get_resource()
Date: Thu, 10 Jun 2021 20:49:58 +0800	[thread overview]
Message-ID: <20210610124958.116142-1-yangyingliang@huawei.com> (raw)

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>
---
 sound/mips/snd-n64.c | 4 ++++
 1 file changed, 4 insertions(+)

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;
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Yang Yingliang <yangyingliang@huawei.com>
To: <linux-kernel@vger.kernel.org>, <alsa-devel@alsa-project.org>
Cc: tiwai@suse.com
Subject: [PATCH -next] ALSA: n64: check return value after calling platform_get_resource()
Date: Thu, 10 Jun 2021 20:49:58 +0800	[thread overview]
Message-ID: <20210610124958.116142-1-yangyingliang@huawei.com> (raw)

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>
---
 sound/mips/snd-n64.c | 4 ++++
 1 file changed, 4 insertions(+)

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;
-- 
2.25.1


             reply	other threads:[~2021-06-10 12:45 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10 12:49 Yang Yingliang [this message]
2021-06-10 12:49 ` [PATCH -next] ALSA: n64: check return value after calling platform_get_resource() Yang Yingliang
2021-06-12  7:31 ` Takashi Iwai
2021-06-12  7:31   ` Takashi Iwai

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