linux-kernel - Re: [PATCH] USB: gadget: g_fs: possible invalid pointer reference bug fixed

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Date:	Wed, 16 Jun 2010 11:30:09 +0200
From:	Michał Nazarewicz <m.nazarewicz@...sung.com>
To:	Sergei Shtylyov <sshtylyov@...sta.com>
Cc:	linux-usb@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: gadget: g_fs: possible invalid pointer reference bug
 fixed

> Michal Nazarewicz wrote:
>> diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
>> index 2f26470..da3a9e4 100644
>> --- a/drivers/usb/gadget/g_ffs.c
>> +++ b/drivers/usb/gadget/g_ffs.c
>> @@ -392,6 +392,17 @@ static int __gfs_do_config(struct usb_configuration *c,
>>  	if (unlikely(ret < 0))
>>  		return ret;
>>
>> +	/* After previous do_configs there may be some invalid
>> +	 * pointers in c->interface array.  This happens every time
>> +	 * a user space function with fewer interfaces than a user
>> +	 * space function that was run before the new one is run.  The
>> +	 * compasit's set_config() assumes that if there is no more
>> +	 * then MAX_CONFIG_INTERFACES interfaces in a configuration
>> +	 * then there is a NULL pointer after the last interface in
>> +	 * c->interface array.  We need to make sure this is true. */

On Tue, 15 Jun 2010 12:10:36 +0200, Sergei Shtylyov <sshtylyov@...sta.com> wrote:
>     According to CodingStyle, the preferred style of the multi-line comments
> is this:
>
> /*
>   * bla
>   * bla
>   */

You are of course correct but on the other hand I have consistently used
the incorrect form so far also in g_ffs.c so...  I think correcting only
this comment would bring inconsistency so I should rather resend it with
other (two) comments corrected as well.  Anyone thinks I should do that?

And I promise, I will remember to use the correct format in my future
files.

-- 
Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=./ `o
| Computer Science,  Michał "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--
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