netdev - Re: [PATCH] lib: fix callers of strtobool to use char array

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Date:	Wed, 27 Jan 2016 17:03:23 -0800
From:	Kees Cook <keescook@...omium.org>
To:	Joe Perches <joe@...ches.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Amitkumar Karwar <akarwar@...vell.com>,
	Nishant Sarmukadam <nishants@...vell.com>,
	Kalle Valo <kvalo@...eaurora.org>,
	Steve French <sfrench@...ba.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	linux-cifs@...r.kernel.org
Subject: Re: [PATCH] lib: fix callers of strtobool to use char array

On Wed, Jan 27, 2016 at 4:58 PM, Joe Perches <joe@...ches.com> wrote:
> On Wed, 2016-01-27 at 16:45 -0800, Kees Cook wrote:
>> Some callers of strtobool were passing a pointer to unterminated strings.
>> This fixes the issue and consolidates some logic in cifs.
>
> This may be incomplete as it duplicates the behavior for
> the old number of characters, but this is not a solution
> for the entry of a bool that is "on" or "off".

As in, the on/off patch is missing? Yes, that's been sent separately,
but I wanted to make sure these changes weren't upsetting to the two
users.

>> diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
> []
>> @@ -290,7 +305,8 @@ static ssize_t cifs_stats_proc_write(struct file *file,
>>                       }
>>               }
>>               spin_unlock(&cifs_tcp_ses_lock);
>> -     }
>> +     } else
>> +             return rc;
>
> Likely better to reverse the test and unindent the
> preceding block.
>
> Otherwise, please make sure to use the general brace
> form of when one branch needs braces, the other branch
> should have them too.

Okay, sure, I'll rework this and send it together with the on/off patch.

-Kees

-- 
Kees Cook
Chrome OS & Brillo Security