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

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Message-ID: <CAB9v_DHXB6n07sEY_=HZ8S4zMO01Vs8B78dGyEWrm-hyRP82XA@mail.gmail.com>
Date:	Sun, 3 Jul 2011 01:25:32 +0400
From:	Alexey Zaytsev <alexey.zaytsev@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	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 Fri, Jul 1, 2011 at 10:01, Alexey Zaytsev <alexey.zaytsev@...il.com> wrote:
> On Thu, Jun 30, 2011 at 01:51, Andrew Morton <akpm@...ux-foundation.org> wrote:
>>
>> (switched to email.  Please respond via emailed reply-to-all, not via the
>> bugzilla web interface).
>>
>> On Thu, 23 Jun 2011 17:33:54 GMT
>> bugzilla-daemon@...zilla.kernel.org wrote:
>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=38102
>>>
>>>            Summary: BUG kmalloc-2048: Poison overwritten
>>>            Product: Drivers
>>>            Version: 2.5
>>>     Kernel Version: 3.0.0-rc4
>>
>> Looks like a 2.6.38->2.6.39 regression, perhaps a memory scribble in b44.
>
> Actually, not sure about the version. 39 was the first one I've been
> using in the scenario. Checking older versions now.
> And git-log does not show a lot of changes to the b44 driver, so it
> might be something unrelated.
>

I've checked back as far as 2.6.27, and the problem is still there.
I've also looked through the allocation-related code, and it seemed
sane. I'm not sure I understand the 1GB dma workaround, but this path
is never hit in my case. So adding the driver authors to CC. This
could be something different, but I've been unable to reproduce using
an other machine with an rtl8139 nic.
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