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From: Keith Busch <keith.busch@intel.com>
To: Ming Lei <tom.leiming@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>,
	Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@infradead.org>,
	jonathan.derrick@intel.com, LKML <linux-kernel@vger.kernel.org>,
	linux-block@vger.kernel.org
Subject: Re: blk: accessing invalid memory with "blk-mq: dynamic h/w context count"
Date: Fri, 12 Feb 2016 18:50:10 +0000	[thread overview]
Message-ID: <20160212185010.GA28832@localhost.localdomain> (raw)
In-Reply-To: <20160212162435.1e809790@tom-T450>

On Fri, Feb 12, 2016 at 04:24:35PM +0800, Ming Lei wrote:
> On Fri, 12 Feb 2016 00:41:28 -0500
> Hi Sasha,
> 
> It should be about timing of setting q->mq_ops, and
> I believe the following patch may fix the issue, could
> you give a test?

Thanks, Ming, that looks better and looks like the same as the 0-day
failure from when this was posted a couple months ago. I thought this
was potentially risky looking, but haven't had time to make changes.

I also didn't see that this was applied yet either. I've a broken filter
moving important emails to the junk... On the plus side, the exposure
led to a potential fix.

      reply	other threads:[~2016-02-12 18:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-12  5:41 blk: accessing invalid memory with "blk-mq: dynamic h/w context count" Sasha Levin
2016-02-12  8:24 ` Ming Lei
2016-02-12 18:50   ` Keith Busch [this message]

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