netdev - Re: [Bugme-new] [Bug 38102] New: BUG kmalloc-2048: Poison overwritten

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Date:	Mon, 4 Jul 2011 16:43:51 +0200
From:	Michael Büsch <m@...s.ch>
To:	Michael Büsch <m@...s.ch>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Alexey Zaytsev <alexey.zaytsev@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	netdev@...r.kernel.org, Gary Zambrano <zambrano@...adcom.com>,
	bugme-daemon@...zilla.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Pekka Pietikainen <pp@...oulu.fi>,
	Florian Schirmer <jolt@...box.org>,
	Felix Fietkau <nbd@...nwrt.org>, Michael Buesch <mb@...sch.de>
Subject: Re: [Bugme-new] [Bug 38102] New: BUG kmalloc-2048: Poison
 overwritten

On Mon, 4 Jul 2011 16:27:26 +0200
Michael Büsch <m@...s.ch> wrote:
> We do this in b43, which has exactly the same DMA engine.

(Ok, it turns out we don't do this in b43 (We only do it on the TX side).
 But that's a bug. We should do a wmb() on the RX side before advancing the
 descriptor ring pointer.)
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