CVE-2024-43819 kvm: s390: Reject memory region operations for ucontrol VMs

In the Linux kernel, the following vulnerability has been resolved: kvm: s390: Reject memory region operations for ucontrol VMs This change rejects the KVMSETUSERMEMORYREGION and KVMSETUSERMEMORYREGION2 ioctls when called on a ucontrol VM. This is necessary since ucontrol VMs have kvm-arch.gmap s...

CVE-2024-43819

CVE-2024-43819 : In the Linux kernel, KVM for s390 was updated to reject user memory region operations on ucontrol VMs. Specifically, KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2 ioctls are now rejected for ucontrol VMs because their kvm->arch.gmap is set to 0, which could lead t...