linux-kernel - Re: Potential NULL pointer deference in spi

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Date:   Wed, 9 Oct 2019 22:48:32 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Yizhuo Zhai <yzhai003@....edu>, Mark Brown <broonie@...nel.org>,
        linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Re: Potential NULL pointer deference in spi



On 10/9/19 10:37 PM, Yizhuo Zhai wrote:
> Hi All:
> 
> drivers/spi/spi.c:
> 
> The function to_spi_device() could return NULL, but some callers
> in this file does not check the return value while directly dereference
> it, which seems potentially unsafe.
> 
> Such callers include spidev_release(),  spi_dev_check(),
> driver_override_store(), etc.
> 
> 


Many of your reports are completely bogus.

I suggest you spend more time before sending such emails to very large audience
and risk being ignored at some point.

Thanks.