linux-kernel - Re: [PATCH][next] netfilter: nftables: fix incorrect increment of loop counter

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Date:   Tue, 15 Dec 2020 17:19:50 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] netfilter: nftables: fix incorrect increment of
 loop counter

On Tue, Dec 15, 2020 at 03:38:30PM +0100, Pablo Neira Ayuso wrote:
> Hi,
> 
> On Mon, Dec 14, 2020 at 11:40:15PM +0000, Colin King wrote:
> > From: Colin Ian King <colin.king@...onical.com>
> > 
> > The intention of the err_expr cleanup path is to iterate over the
> > allocated expr_array objects and free them, starting from i - 1 and
> > working down to the start of the array. Currently the loop counter
> > is being incremented instead of decremented and also the index i is
> > being used instead of k, repeatedly destroying the same expr_array
> > element.  Fix this by decrementing k and using k as the index into
> > expr_array.
> > 
> > Addresses-Coverity: ("Infinite loop")
> > Fixes: 8cfd9b0f8515 ("netfilter: nftables: generalize set expressions support")
> > Signed-off-by: Colin Ian King <colin.king@...onical.com>
> 
> Reviewed-by: Pablo Neira Ayuso <pablo@...filter.org>
> 
> @Jakub: Would you please take this one into net-next? Thanks!

You marked as "Awaiting Upstream", I'll take care of it.

Thanks.