@@ -553,10 +553,12 @@ static __latent_entropy int dup_mmap(str
if (retval)
goto fail_nomem_anon_vma_fork;
if (tmp->vm_flags & VM_WIPEONFORK) {
- /* VM_WIPEONFORK gets a clean slate in the child. */
+ /*
+ * VM_WIPEONFORK gets a clean slate in the child.
+ * Don't prepare anon_vma until fault since we don't
+ * copy page for current vma.
+ */
tmp->anon_vma = NULL;
- if (anon_vma_prepare(tmp))
- goto fail_nomem_anon_vma_fork;
} else if (anon_vma_fork(tmp, mpnt))
goto fail_nomem_anon_vma_fork;
tmp->vm_flags &= ~(VM_LOCKED | VM_LOCKONFAULT);