linux-kernel - Re: [PATCH 1/6] staging: rtl8188eu: use safe iterator in rtw_free_network

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Date:   Tue, 18 May 2021 11:28:55 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-staging@...ts.linux.dev, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] staging: rtl8188eu: use safe iterator in
 rtw_free_network_queue

On Mon, May 17, 2021 at 06:57:33PM +0300, Dan Carpenter wrote:
> Thanks for catching these...  I've created a new Smatch static checker
> warning for this but it only works for list_for_each_entry().
> Eventually someone would have run the coccinelle script to convert these
> list_for_each loops into list_for_each_entry().  Otherwise you have to
> parse container_of() and I've been meaning to do that for a while but I
> haven't yet.
> 
> Anyway, I'm going to test it out overnight and see what it finds.  It's
> sort a new use for the modification_hook(), before I had only ever used
> it to silence warnings but this check uses it to trigger warnings.  So
> perhaps it will generate a lot of false positives.  We'll see.
> 
> It sets the state of the iterator to &start at the start of the loop
> and if it's not &start state at the end then it prints a warning.
> 
> regards,
> dan carpenter
> 

That Smatch check didn't work at all.  :P  Back to the drawing board.

regards,
dan carpenter