From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933621AbdKGASj (ORCPT ); Mon, 6 Nov 2017 19:18:39 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:53714 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933482AbdKGASg (ORCPT ); Mon, 6 Nov 2017 19:18:36 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Dennis Dalessandro" , "Doug Ledford" , "Leon Romanovsky" Date: Mon, 06 Nov 2017 23:03:02 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 093/294] RDMA/uverbs: Prevent leak of reserved field In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.50-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Leon Romanovsky commit f7a6cb7b38c6845b26aaa8bbdf519ff6e3090831 upstream. initialize to zero the response structure to prevent the leakage of "resp.reserved" field. drivers/infiniband/core/uverbs_cmd.c:1178 ib_uverbs_resize_cq() warn: check that 'resp.reserved' doesn't leak information Fixes: 33b9b3ee9709 ("IB: Add userspace support for resizing CQs") Signed-off-by: Leon Romanovsky Reviewed-by: Dennis Dalessandro Signed-off-by: Doug Ledford Signed-off-by: Ben Hutchings --- drivers/infiniband/core/uverbs_cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -1303,7 +1303,7 @@ ssize_t ib_uverbs_resize_cq(struct ib_uv int out_len) { struct ib_uverbs_resize_cq cmd; - struct ib_uverbs_resize_cq_resp resp; + struct ib_uverbs_resize_cq_resp resp = {}; struct ib_udata udata; struct ib_cq *cq; int ret = -EINVAL;