From: Robin Holt <holt@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Robin Holt <holt@sgi.com>, linux-kernel@vger.kernel.org
Subject: Re: [Patch] Incoming XPC channel messages can come in after the channel's partition structures have been torn down.
Date: Mon, 18 Oct 2010 14:52:27 -0500 [thread overview]
Message-ID: <20101018195227.GK14064@sgi.com> (raw)
In-Reply-To: <20101018124055.26325ea5.akpm@linux-foundation.org>
On Mon, Oct 18, 2010 at 12:40:55PM -0700, Andrew Morton wrote:
> On Mon, 18 Oct 2010 08:35:08 -0500
> Robin Holt <holt@sgi.com> wrote:
>
> > Under some workloads, some channel messages have been observed being
> > delayed on the sending side past the point where the receiving side
> > has been able to tear down its partition structures. This condition is
> > already detected in xpc_handle_activate_IRQ_uv(), but that information
> > is not given to xpc_handle_activate_mq_msg_uv(). As a result,
> > xpc_handle_activate_mq_msg_uv() assumes the structures still exist and
> > references them.
>
> With what result? Machine goes boom?
>
> Would you consider this a 2.6.36 fix? Backport to -stable?
I would consider it a backport to stable. It is a NULL pointer deref.
This pach applies back to 2.6.32. I did not try older kernels than
that.
Robin
prev parent reply other threads:[~2010-10-18 19:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-18 13:35 [Patch] Incoming XPC channel messages can come in after the channel's partition structures have been torn down Robin Holt
2010-10-18 19:40 ` Andrew Morton
2010-10-18 19:52 ` Robin Holt [this message]
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