- c->capability_size = item->size - offsetof(struct kdbus_item, caps.caps);
- c->capability = memdup(item->caps.caps, c->capability_size);
+ if (item->caps.last_cap != cap_last_cap() ||
+ item->size - offsetof(struct kdbus_item, caps.caps) < DIV_ROUND_UP(item->caps.last_cap, 32U) * 4 * 4)
+ return -EBADMSG;
+
+ c->capability = memdup(item->caps.caps, item->size - offsetof(struct kdbus_item, caps.caps));