From: Jason Gunthorpe <jgg@ziepe.ca>
To: Steven Sistare <steven.sistare@oracle.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH] vfio/type1: Cleanup remaining vaddr removal/update fragments
Date: Mon, 12 Dec 2022 09:17:54 -0400 [thread overview]
Message-ID: <Y5cqAk1/6ayzmTjg@ziepe.ca> (raw)
In-Reply-To: <6914b4eb-cd82-0c3e-6637-c7922092ef11@oracle.com>
On Sat, Dec 10, 2022 at 09:14:06AM -0500, Steven Sistare wrote:
> Thank you for your thoughtful response. Rather than debate the degree of
> of vulnerability, I propose an alternate solution. The technical crux of
> the matter is support for mediated devices.
I'm not sure I'm convinced about that. It is easy to make problematic
situations with mdevs, but that doesn't mean other cases don't exist
too eg what happens if userspace suspends and then immediately does
something to trigger a domain attachment? Doesn't it still deadlock
the kernel?
Honestly, I'm not sure I see the big deal, just don't backport these
reverts to your disto kernel.
Jason
next prev parent reply other threads:[~2022-12-12 13:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-07 21:45 [PATCH] vfio/type1: Cleanup remaining vaddr removal/update fragments Alex Williamson
2022-12-07 23:21 ` Jason Gunthorpe
2022-12-08 7:56 ` Tian, Kevin
2022-12-08 16:40 ` Alex Williamson
2022-12-09 18:40 ` Steven Sistare
2022-12-09 19:42 ` Alex Williamson
2022-12-09 19:52 ` Steven Sistare
2022-12-09 21:01 ` Alex Williamson
2022-12-10 14:14 ` Steven Sistare
2022-12-12 13:17 ` Jason Gunthorpe [this message]
2022-12-12 13:54 ` Steven Sistare
2022-12-12 15:58 ` Alex Williamson
2022-12-12 20:59 ` Steven Sistare
2022-12-12 21:26 ` Alex Williamson
2022-12-12 23:08 ` Jason Gunthorpe
2022-12-12 23:29 ` Alex Williamson
2022-12-12 23:35 ` Jason Gunthorpe
2022-12-13 0:04 ` Alex Williamson
2022-12-13 0:11 ` Jason Gunthorpe
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