KVM: Allocate guest memory as MAP_PRIVATE, not MAP_SHARED

There is no reason to share internal memory slots with fork()ed instances.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bfc7c332c5d7..675d010995a2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4296,7 +4296,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
                         userspace_addr = do_mmap(NULL, 0,
                                                  npages * PAGE_SIZE,
                                                  PROT_READ | PROT_WRITE,
-                                                 MAP_SHARED | MAP_ANONYMOUS,
+                                                 MAP_PRIVATE | MAP_ANONYMOUS,
                                                  0);
                         up_write(&current->mm->mmap_sem);