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Message-Id: <20110629145135.5179fb0c.akpm@linux-foundation.org>
Date: Wed, 29 Jun 2011 14:51:35 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: netdev@...r.kernel.org, Gary Zambrano <zambrano@...adcom.com>
Cc: bugme-daemon@...zilla.kernel.org, alexey.zaytsev@...il.com
Subject: Re: [Bugme-new] [Bug 38102] New: BUG kmalloc-2048: Poison
overwritten
(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.
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: high
> Priority: P1
> Component: Network
> AssignedTo: drivers_network@...nel-bugs.osdl.org
> ReportedBy: alexey.zaytsev@...il.com
> Regression: Yes
>
>
> Created an attachment (id=63342)
> --> (https://bugzilla.kernel.org/attachment.cgi?id=63342)
> dmesg
>
> Hi.
>
> Getting a bunch of kmalloc-2048 use-after-free. First noticed in 2.6.39, but
> also present in 3.0.0-rc4.
>
> I guess it might be driver-related, as the problem went unnoticed for a whole
> release. The device is
>
> 02:0e.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev
> 02)
> Subsystem: Hewlett-Packard Company NX7300 laptop
> Flags: bus master, fast devsel, latency 64, IRQ 16
> Memory at f4108000 (32-bit, non-prefetchable) [size=8K]
> Capabilities: [40] Power Management version 2
> Kernel driver in use: b44
>
>
> Config and dmesg attached. I'm noticing the problem when ssh'ing to an illumos
> box, as ssh would disconnect when the illumos build process spews the cached
> build-logs. But the problem might be unrelated, as one corruption contains http
> data. It also seems is hard to trigger any other traffic, even from the same
> box.
>
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