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

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Message-ID: <CAB9v_DHHmeFtQ4jrtVRSGWBvB=W_=QBHCvMi-u25e0nPBQ1jAA@mail.gmail.com>
Date:	Tue, 5 Jul 2011 00:25:09 +0400
From:	Alexey Zaytsev <alexey.zaytsev@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Michael Büsch <m@...s.ch>,
	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, Jul 4, 2011 at 19:12, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le lundi 04 juillet 2011 à 16:43 +0200, Michael Büsch a écrit :
>> 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.)
>
> I am wondering what happens if RX ring is set to 64, and we receive
> exactly 64 buffers in one round, B44_DMARX_PTR wont change at all ?
>
> Alexey, could you try this patch please ?

Sorry, did not help.
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