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Re: [PATCH 0/2] libs/light: fix a race when domain are destroied and created concurrently
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Dario Faggioli <dfaggioli@xxxxxxxx>
- Date: Thu, 13 Jan 2022 11:46:19 +0000
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- Cc: Juergen Gross <JGross@xxxxxxxx>, Jim Fehlig <jfehlig@xxxxxxxx>, "wl@xxxxxxx" <wl@xxxxxxx>, "anthony.perard@xxxxxxxxxx" <anthony.perard@xxxxxxxxxx>
- Delivery-date: Thu, 13 Jan 2022 11:46:32 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH 0/2] libs/light: fix a race when domain are destroied and created concurrently
On Wed, 2022-01-12 at 17:41 +0100, Dario Faggioli wrote:
> It is possible to encounter a segfault in libxl during concurrent
> domain
> create and destroy operations.
>
> This is because Placement of existing domains on the host's CPUs is
> examined
> when creating a new domain, but the existing logic does not tolerate
> well a
> domain disappearing during the examination.
>
Oh, one more thing. This has been first encountered and reproduced on
our SLE15.2, which ships Xen 4.13 so, if the fixes are accepted
upstream, I think they should also be backported (to all supported
branches, I would say).
Thanks and Regards
--
Dario Faggioli, Ph.D
http://about.me/dario.faggioli
Virtualization Software Engineer
SUSE Labs, SUSE https://www.suse.com/
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