Fix memslots handling for UCONTROL guests. Attempts to delete user memslots will fail, as they should, without the risk of a NULL pointer dereference. Signed-off-by: Claudio Imbrenda --- arch/s390/kvm/kvm-s390.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index be2a721e2574..435c3a1b74f8 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -5636,7 +5636,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *new, enum kvm_mr_change change) { - if (kvm_is_ucontrol(kvm) && new->id < KVM_USER_MEM_SLOTS) + if (kvm_is_ucontrol(kvm) && new && new->id < KVM_USER_MEM_SLOTS) return -EINVAL; /* When we are protected, we should not change the memory slots */ -- 2.53.0