On Thu, 4 Jan 2024 18:32:32 +0000, Oliver Upton wrote:
> There is a potential UAF scenario in the case of an LPI translation
> cache hit racing with an operation that invalidates the cache, such
> as a DISCARD ITS command. The root of the problem is that
> vgic_its_check_cache() does not elevate the refcount on the vgic_irq
> before dropping the lock that serializes refcount changes.
>
> Have vgic_its_check_cache() raise the refcount on the returned vgic_irq
> and add the corresponding decrement after queueing the interrupt.
Applied to next, thanks!
[1/1] KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache
commit: ad362fe07fecf0aba839ff2cc59a3617bd42c33f
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
