diff options
| -rw-r--r-- | vm/vm_kern.c | 6 |
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) { |