linux-kernel - Re: [PATCH] staging: lirc: fix NULL pointer dereference

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Message-ID: <CAHb8M2AN5Hx4Mn9uTnge2MQzyT7BD1XxM2edZyPdeCt-V91J5g@mail.gmail.com>
Date:	Wed, 2 Apr 2014 18:41:20 +0900
From:	DaeSeok Youn <daeseok.youn@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	m.chehab@...sung.com, devel <devel@...verdev.osuosl.org>,
	Andreea Bernat <bernat.ada@...il.com>,
	Greg KH <gregkh@...uxfoundation.org>, jarod@...sonet.com,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Martina Trompouki <mtrompou@...il.com>,
	linux-media@...r.kernel.org
Subject: Re: [PATCH] staging: lirc: fix NULL pointer dereference

You are right. remove whole thing and send it again.

Thanks.
Daeseok Youn

2014-04-02 18:13 GMT+09:00 Dan Carpenter <dan.carpenter@...cle.com>:
> On Wed, Apr 02, 2014 at 05:18:39PM +0900, Daeseok Youn wrote:
>>
>> coccicheck says:
>>  drivers/staging/media/lirc/lirc_igorplugusb.c:226:15-21:
>> ERROR: ir is NULL but dereferenced.
>>
>> Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
>> ---
>>  drivers/staging/media/lirc/lirc_igorplugusb.c |    4 ++--
>>  1 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/staging/media/lirc/lirc_igorplugusb.c b/drivers/staging/media/lirc/lirc_igorplugusb.c
>> index f508a13..0ef393b 100644
>> --- a/drivers/staging/media/lirc/lirc_igorplugusb.c
>> +++ b/drivers/staging/media/lirc/lirc_igorplugusb.c
>> @@ -223,8 +223,8 @@ static int unregister_from_lirc(struct igorplug *ir)
>>       int devnum;
>>
>>       if (!ir) {
>> -             dev_err(&ir->usbdev->dev,
>> -                     "%s: called with NULL device struct!\n", __func__);
>> +             printk(DRIVER_NAME "%s: called with NULL device struct!\n",
>> +                    __func__);
>
>
> It should be pr_err() or something.  But actually "ir" can't be NULL so
> just delete the whole condition.
>
>
>>               return -EINVAL;
>>       }
>
> regards,
> dan carpenter
>
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