From: Ameer Hamza <amhamza.mgc@gmail.com>
To: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
"lgirdwood@gmail.com" <lgirdwood@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"tiwai@suse.com" <tiwai@suse.com>,
"broonie@kernel.org" <broonie@kernel.org>
Subject: Re: [PATCH] ASoC: test-component: fix null pointer dereference.
Date: Mon, 6 Dec 2021 14:29:37 +0500 [thread overview]
Message-ID: <20211206092937.GA5609@hamza-OptiPlex-7040> (raw)
In-Reply-To: <TYCPR01MB55813B26BB2B3BB6D1E072F2D46C9@TYCPR01MB5581.jpnprd01.prod.outlook.com>
On Sun, Dec 05, 2021 at 10:40:27PM +0000, Kuninori Morimoto wrote:
>
> Hi Ameer
>
> Thank you for your patch.
>
> > Dereferncing of_id pointer will result in exception in current
> > implementation since of_match_device() will assign it to NULL.
> > Adding NULL check for protection.
> (snip)
> > @@ -532,13 +532,16 @@ static int test_driver_probe(struct platform_device *pdev)
> > struct device_node *node = dev->of_node;
> > struct device_node *ep;
> > const struct of_device_id *of_id = of_match_device(test_of_match, &pdev->dev);
> > - const struct test_adata *adata = of_id->data;
> > + const struct test_adata *adata;
> > struct snd_soc_component_driver *cdriv;
> > struct snd_soc_dai_driver *ddriv;
> > struct test_dai_name *dname;
> > struct test_priv *priv;
> > int num, ret, i;
> >
> > + if (!of_id)
> > + return -EINVAL;
> > + adata = of_id->data;
>
> But hmm...
> Probing this driver without adata is strange for me.
> How did probe this driver ??
Thank you for your response. Unfortunately, I am not aware of
implementation details of this component. Coverity suggested that there
can be a potential NULL pointer access which seems logical to me. Do you
agree with coverity here?
>
> Best regards
> ---
> Kuninori Morimoto
next prev parent reply other threads:[~2021-12-06 9:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-05 20:42 [PATCH] ASoC: test-component: fix null pointer dereference Ameer Hamza
2021-12-05 22:40 ` Kuninori Morimoto
2021-12-06 9:29 ` Ameer Hamza [this message]
2021-12-06 23:19 ` Kuninori Morimoto
2021-12-07 8:15 ` Ameer Hamza
2021-12-07 12:51 ` Mark Brown
2021-12-07 14:23 ` [PATCH v2] " Ameer Hamza
2021-12-08 0:05 ` Kuninori Morimoto
2021-12-08 12:05 ` Ameer Hamza
2021-12-08 12:36 ` [PATCH] ASoC: test-component: replace of_match_device() to of_device_get_match_data() Ameer Hamza
2021-12-08 12:40 ` Ameer Hamza
2021-12-08 22:40 ` Kuninori Morimoto
2021-12-09 13:45 ` [PATCH v2] ASoC: test-component: fix null pointer dereference Mark Brown
2021-12-07 23:53 ` [PATCH] " Kuninori Morimoto
2021-12-06 18:00 ` Mark Brown
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