RDMA/nldev: Don't expose number of not-visible entries

Netlink dumpit handshake exchanges the index from which kernel should start to return its value, in current code, this index included not-visible in this PID items too and indirectly revealed the number of entries. Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
DanielOgorchock · Feb 19, 2019 · f2a0e45 · f2a0e45
1 parent 1b8b778
commit f2a0e45
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
@@ -1123,13 +1123,10 @@ static int res_get_common_dumpit(struct sk_buff *skb,
 	 * objects.
 	 */
 	xa_for_each(&rt->xa, id, res) {
-		if (idx < start)
-			goto next;
-
 		if (!is_visible_in_pid_ns(res))
-			goto next;
+			continue;
 
-		if (!rdma_restrack_get(res))
+		if (idx < start || !rdma_restrack_get(res))
 			goto next;
 
 		xa_unlock(&rt->xa);