linux-kernel - Re: [PATCH 0/3] cast sizeof to int for comparison

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Message-ID: <653914f26dc8433a3f682b5e7eb850ab94bd431d.camel@perches.com>
Date:   Sun, 01 Jul 2018 11:26:32 -0700
From:   Joe Perches <joe@...ches.com>
To:     Julia Lawall <Julia.Lawall@...6.fr>, linux-usb@...r.kernel.org,
        Chengguang Xu <cgxu519@....com>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-input@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH 0/3] cast sizeof to int for comparison

On Sun, 2018-07-01 at 19:32 +0200, Julia Lawall wrote:
> Comparing an int to a size, which is unsigned, causes the int to become
> unsigned, giving the wrong result.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)

Great, thanks.

But what about the ones in net/smc like:

> net/smc/smc_clc.c:	
> 
>         len = kernel_sendmsg(smc->clcsock, &msg, &vec, 1,
>                              sizeof(struct smc_clc_msg_decline));
>         if (len < sizeof(struct smc_clc_msg_decline))

Are those detected by the semantic match and ignored?