731 static bool mappings_overlap(struct uid_gid_map *new_map,  in mappings_overlap()  argument
742 	for (idx = 0; idx < new_map->nr_extents; idx++) {  in mappings_overlap()
747 		if (new_map->nr_extents <= UID_GID_MAP_MAX_BASE_EXTENTS)  in mappings_overlap()
748 			prev = &new_map->extent[idx];  in mappings_overlap()
750 			prev = &new_map->forward[idx];  in mappings_overlap()
880 			    struct uid_gid_map *new_map)  in verify_root_map()  argument
886 	for (idx = 0; idx < new_map->nr_extents; idx++) {  in verify_root_map()
887 		if (new_map->nr_extents <= UID_GID_MAP_MAX_BASE_EXTENTS)  in verify_root_map()
888 			extent0 = &new_map->extent[idx];  in verify_root_map()
890 			extent0 = &new_map->forward[idx];  in verify_root_map()
928 	struct uid_gid_map new_map;  in map_write()  local
964 	memset(&new_map, 0, sizeof(struct uid_gid_map));  in map_write()
1026 		if (mappings_overlap(&new_map, &extent))  in map_write()
1029 		if ((new_map.nr_extents + 1) == UID_GID_MAP_MAX_EXTENTS &&  in map_write()
1033 		ret = insert_extent(&new_map, &extent);  in map_write()
1039 	if (new_map.nr_extents == 0)  in map_write()
1044 	if (!new_idmap_permitted(file, map_ns, cap_setid, &new_map))  in map_write()
1051 	for (idx = 0; idx < new_map.nr_extents; idx++) {  in map_write()
1055 		if (new_map.nr_extents <= UID_GID_MAP_MAX_BASE_EXTENTS)  in map_write()
1056 			e = &new_map.extent[idx];  in map_write()
1058 			e = &new_map.forward[idx];  in map_write()
1077 	ret = sort_idmaps(&new_map);  in map_write()
1082 	if (new_map.nr_extents <= UID_GID_MAP_MAX_BASE_EXTENTS) {  in map_write()
1083 		memcpy(map->extent, new_map.extent,  in map_write()
1084 		       new_map.nr_extents * sizeof(new_map.extent[0]));  in map_write()
1086 		map->forward = new_map.forward;  in map_write()
1087 		map->reverse = new_map.reverse;  in map_write()
1090 	map->nr_extents = new_map.nr_extents;  in map_write()
1095 	if (ret < 0 && new_map.nr_extents > UID_GID_MAP_MAX_BASE_EXTENTS) {  in map_write()
1096 		kfree(new_map.forward);  in map_write()
1097 		kfree(new_map.reverse);  in map_write()
1162 				struct uid_gid_map *new_map)  in new_idmap_permitted()  argument
1166 	if (cap_setid == CAP_SETUID && !verify_root_map(file, ns, new_map))  in new_idmap_permitted()
1172 	if ((new_map->nr_extents == 1) && (new_map->extent[0].count == 1) &&  in new_idmap_permitted()
1174 		u32 id = new_map->extent[0].lower_first;  in new_idmap_permitted()