linux-kernel - Re: [PATCH][next] iwlegacy: ensure loop counter addr does not wrap and cause an infinite loop

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Message-ID: <20200126093932.GA605118@wp.pl>
Date:   Sun, 26 Jan 2020 10:39:32 +0100
From:   Stanislaw Gruszka <stf_xl@...pl>
To:     Colin King <colin.king@...onical.com>
Cc:     Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Meenakshi Venkataraman <meenakshi.venkataraman@...el.com>,
        Wey-Yi Guy <wey-yi.w.guy@...el.com>,
        Johannes Berg <johannes.berg@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] iwlegacy: ensure loop counter addr does not wrap
 and cause an infinite loop

On Sun, Jan 26, 2020 at 12:09:54AM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The loop counter addr is a u16 where as the upper limit of the loop
> is a an int. In the unlikely event that the il->cfg->eeprom_size is
> greater than 64K then we end up with an infinite loop since addr will
> wrap around an never reach upper loop limit. Fix this by making addr
> an int.
> 
> Addresses-Coverity: ("Infinite loop")
> Fixes: be663ab67077 ("iwlwifi: split the drivers for agn and legacy devices 3945/4965")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Stanislaw Gruszka <stf_xl@...pl>