Re: [PATCH] VSOCK: sock_put wasn't safe to call in interrupt context

From: David Miller
Date: Thu Oct 22 2015 - 10:05:20 EST


From: Jorgen Hansen <jhansen@xxxxxxxxxx>
Date: Wed, 21 Oct 2015 04:53:56 -0700

> In the vsock vmci_transport driver, sock_put wasn't safe to call
> in interrupt context, since that may call the vsock destructor
> which in turn calls several functions that should only be called
> from process context. This change defers the callling of these
> functions to a worker thread. All these functions were
> deallocation of resources related to the transport itself.
>
> Furthermore, an unused callback was removed to simplify the
> cleanup.
>
> Multiple customers have been hitting this issue when using
> VMware tools on vSphere 2015.
>
> Also added a version to the vmci transport module (starting from
> 1.0.2.0-k since up until now it appears that this module was
> sharing version with vsock that is currently at 1.0.1.0-k).
>
> Reviewed-by: Aditya Asarwade <asarwade@xxxxxxxxxx>
> Reviewed-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
> Signed-off-by: Jorgen Hansen <jhansen@xxxxxxxxxx>

Applied, thanks.
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