linux-kernel - Re: [PATCH v2] iio: vadc: Fix potential dereference of NULL pointer

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Message-ID: <7e12c127.2a22e.180dd2cb2a3.Coremail.lyz_cs@pku.edu.cn>
Date:   Fri, 20 May 2022 00:35:35 +0800 (GMT+08:00)
From:   刘永志 <lyz_cs@....edu.cn>
To:     "kalle valo" <kvalo@...nel.org>
Cc:     amitkarwar@...il.com, ganapathi017@...il.com,
        sharvari.harisangam@....com, huxinming820@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, arend.vanspriel@...adcom.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: vadc: Fix potential dereference of NULL pointer




> -----Original Messages-----
> From: "Kalle Valo" <kvalo@...nel.org>
> Sent Time: 2022-05-19 23:30:51 (Thursday)
> To: "Yongzhi Liu" <lyz_cs@....edu.cn>
> Cc: amitkarwar@...il.com, ganapathi017@...il.com, sharvari.harisangam@....com, huxinming820@...il.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, arend.vanspriel@...adcom.com, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, fuyq@....pku.edu.cn
> Subject: Re: [PATCH v2] iio: vadc: Fix potential dereference of NULL pointer
> 
> Yongzhi Liu <lyz_cs@....edu.cn> writes:
> 
> > The return value of vadc_get_channel() needs to be checked
> > to avoid use of NULL pointer. Fix this by adding the null
> > pointer check on prop.
> >
> > Fixes: 0917de94c ("iio: vadc: Qualcomm SPMI PMIC voltage ADC driver")
> >
> > Signed-off-by: Yongzhi Liu <lyz_cs@....edu.cn>
> > ---
> >  drivers/iio/adc/qcom-spmi-vadc.c | 23 ++++++++++++++++++++++-
> >  1 file changed, 22 insertions(+), 1 deletion(-)
> 

I'm sorry to send this to linux-wireless by mistake. I will cautiously submit patches later.

> Did you sent this to linux-wireless by mistake?
> 
> -- 
> https://patchwork.kernel.org/project/linux-wireless/list/
> 
> https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches