linux-kernel - Re: [PATCH net 0/2] Fragmented SKB corrections

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Message-Id: <20170715.212954.286118168709267918.davem@davemloft.net>
Date:   Sat, 15 Jul 2017 21:29:54 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     opendmb@...il.com
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 0/2] Fragmented SKB corrections

From: Doug Berger <opendmb@...il.com>
Date: Fri, 14 Jul 2017 16:12:08 -0700

> Two issues were observed in a review of the bcmgenet driver support for
> fragmented SKBs which are addressed by this patch set.
> 
> The first addresses a problem that could occur if the driver is not able
> to DMA map a fragment of the SKB.  This would be a highly unusual event
> but it would leave the hardware descriptors in an invalid state which
> should be prevented.
> 
> The second is a hazard that could occur if the driver is able to reclaim
> the first control block of a fragmented SKB before all of its fragments
> have completed processing by the hardware.  In this case the SKB could
> be freed leading to reuse of memory that is still in use by hardware.

Series applied, thanks.