linux-kernel - Re: [PATCH] ASoC: mt8365: Fix using uninitialized value "i2s

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZuGAwQGPWdpO1-G9@iZbp1asjb3cy8ks0srf007Z>
Date: Wed, 11 Sep 2024 19:36:33 +0800
From: Qianqiang Liu <qianqiang.liu@....com>
To: Mark Brown <broonie@...nel.org>
Cc: amergnat@...libre.com, angelogioacchino.delregno@...labora.com,
	lgirdwood@...il.com, matthias.bgg@...il.com,
	linux-sound@...r.kernel.org, linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: mt8365: Fix using uninitialized value "i2s_data"
 issue

On Wed, Sep 11, 2024 at 11:52:58AM +0100, Mark Brown wrote:
> On Wed, Sep 11, 2024 at 08:15:17AM +0800, Qianqiang Liu wrote:
> 
> >  
> >  	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
> >  
> > +	if (!i2s_data) {
> > +		spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
> > +		return;
> > +	}
> > +
> 
> Why would we look up i2s_data without the lock, take the lock, then
> check if we actually found it?  That doesn't seem right.

Just check the "i2s_data" is NULL or not.

-- 
Best,
Qianqiang Liu