X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/39236c6e673c41db228275375ab7fdb0f837b292..143464d58d2bd6378e74eec636961ceb0d32fb91:/osfmk/vm/vm_map.c?ds=sidebyside

diff --git a/osfmk/vm/vm_map.c b/osfmk/vm/vm_map.c
index 315ad3387..a30ff18e1 100644
--- a/osfmk/vm/vm_map.c
+++ b/osfmk/vm/vm_map.c
@@ -2423,6 +2423,10 @@ vm_map_enter_mem_object(
 		if ((named_entry->protection & cur_protection) !=
 		    cur_protection)
 			return KERN_INVALID_RIGHT;
+		if (offset + size < offset) {
+			/* overflow */
+			return KERN_INVALID_ARGUMENT;
+		}
 		if (named_entry->size < (offset + size))
 			return KERN_INVALID_ARGUMENT;