linux-hardening - Re: [PATCH 2/6][next] cfg80211: Avoid clashing function prototypes

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Message-ID: <71935a08-e9d3-5f9e-5b9a-7847bd38b756@embeddedor.com>
Date:   Tue, 18 Oct 2022 14:31:12 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Kees Cook <keescook@...omium.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Johannes Berg <johannes@...solutions.net>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH 2/6][next] cfg80211: Avoid clashing function prototypes



On 10/17/22 21:41, Kees Cook wrote:

>>   
>>   static const iw_handler	orinoco_handler[] = {
>>   	IW_HANDLER(SIOCSIWCOMMIT,	orinoco_ioctl_commit),
>> -	IW_HANDLER(SIOCGIWNAME,		(iw_handler)cfg80211_wext_giwname),
>> +	IW_HANDLER(SIOCGIWNAME,		cfg80211_wext_giwname),
> 
> This hunk should be in the orinoco patch, I think?

I just didn't want to have this huge patch touching multiple
different files. That's why I decided to split it up into three
separate patches.

But yeah; now it seems like a good idea to merge patches 1 to 3
into just a single patch.

> 
> 
>> [...]
>> +	[IW_IOCTL_IDX(SIOCGIWRETRY)]    = cfg80211_wext_giwretry,
> 
> The common practice seems to be to use IW_HANDLER instead of open-coding
> it like this.
> 
> 	IW_HANDLER(SIOCGIWRETRY,	cfg80211_wext_giwretry),

Yeah; I forget this after reverting Sami's changes:

32fc4a9ad56f ("cfg80211: fix callback type mismatches in wext-compat")

I'll fix it up. :)

Thanks for the feedback!
--
Gustavo