linux-kernel - Re: [oss-drivers] [PATCH] nfp: fix infinite loop on umapping cleanup

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Message-ID: <20170818073234.3f4c5e56@cakuba.netronome.com>
Date:   Fri, 18 Aug 2017 07:32:34 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Colin King <colin.king@...onical.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Simon Horman <simon.horman@...ronome.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        oss-drivers@...ronome.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [oss-drivers] [PATCH] nfp: fix infinite loop on umapping
 cleanup

On Fri, 18 Aug 2017 12:11:50 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The while loop that performs the dma page unmapping never decrements
> index counter f and hence loops forever. Fix this with a pre-decrement
> on f.
> 
> Detected by CoverityScan, CID#1357309 ("Infinite loop")
> 
> Fixes: 4c3523623dc0 ("net: add driver for Netronome NFP4000/NFP6000 NIC VFs")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Jakub Kicinski <jakub.kicinski@...ronome.com>

Thanks!