Re: [PATCH] KVM: arm64: Don't eagerly teardown the vgic on init error

On Wed, 09 Oct 2024 19:36:03 +0100, Marc Zyngier wrote:

As there is very little ordering in the KVM API, userspace can instanciate a half-baked GIC (missing its memory map, for example) at almost any time.

This means that, with the right timing, a thread running vcpu-0 can enter the kernel without a GIC configured and get a GIC created behind its back by another thread. Amusingly, it will pick up that GIC and start messing with the data structures without the GIC having been fully initialised.

[...]

Applied to fixes, thanks!

[1/1] KVM: arm64: Don't eagerly teardown the vgic on init error commit: df5fd75ee305cb5927e0b1a0b46cc988ad8db2b1

Cheers,

M.