linux-kernel - Re: [PATCH] iio: multiplexer: add NULL check on devm_kzalloc() and devm

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Date:   Fri, 7 Jul 2017 11:26:35 +0200
From:   Peter Rosin <peda@...ntia.se>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: multiplexer: add NULL check on devm_kzalloc() and
 devm_kmemdup() return values

On 2017-07-07 06:57, Peter Rosin wrote:
> On 2017-07-07 06:53, Gustavo A. R. Silva wrote:
>> Check return values from call to devm_kzalloc() and devm_kmemup()
> 
> If someone cares enough: s/devm_kmemup/evm_kmemdup/

Strange, there seems to be some inherent shortage of 'd' characters...

Cheers,
pea :-)

> 
>> in order to prevent a NULL pointer dereference.
>>
>> This issue was detected using Coccinelle and the following semantic patch:
>>
>> @@
>> expression x;
>> identifier fld;
>> @@
>>
>> * x = devm_kzalloc(...);
>>    ... when != x == NULL
>>    x->fld
>>
>> Cc: Peter Rosin <peda@...ntia.se>
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> 
> Either way,
> 
> Reviewed-by: Peter Rosin <peda@...ntia.se>
> 
> Thanks!
>