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Diffstat (limited to 'vm')
-rw-r--r--vm/vm_kern.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/vm/vm_kern.c b/vm/vm_kern.c
index 1c843ff..62edbc5 100644
--- a/vm/vm_kern.c
+++ b/vm/vm_kern.c
@@ -256,9 +256,11 @@ projected_buffer_deallocate(map, start, end)
{
vm_map_entry_t entry, k_entry;
+ if (map == VM_MAP_NULL || map == kernel_map)
+ return KERN_INVALID_ARGUMENT;
+
vm_map_lock(map);
- if (map == VM_MAP_NULL || map == kernel_map ||
- !vm_map_lookup_entry(map, start, &entry) ||
+ if (!vm_map_lookup_entry(map, start, &entry) ||
end > entry->vme_end ||
/*Check corresponding kernel entry*/
(k_entry = entry->projected_on) == 0) {