KVM: arm64: Fix circular locking dependency

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix circular locking dependency The rule inside kvm enforces that the vcpu->mutex is taken *inside* kvm->lock. The rule is violated by the pkvm_create_hyp_vm() which acquires the kvm->lock while already holding the vcpu->mutex lock from kvm_vcpu_ioctl(). Avoid the circular locking dependency altogether by protecting the hyp vm handle with the config_lock, much like we already do for other forms of VM-scoped data.

References

• https://git.kernel.org/stable/c/3d16cebf01127f459dcfeb79ed77bd68b124c228
• https://git.kernel.org/stable/c/3ab1c40a1e915e350d9181a4603af393141970cc
• https://git.kernel.org/stable/c/10c02aad111df02088d1a81792a709f6a7eca6cc