From patchwork Wed Jun 5 13:10:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 10976951 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E742492A for ; Wed, 5 Jun 2019 13:11:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA46E28520 for ; Wed, 5 Jun 2019 13:11:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CEC88285FD; Wed, 5 Jun 2019 13:11:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 854A42897C for ; Wed, 5 Jun 2019 13:11:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728025AbfFENLL (ORCPT ); Wed, 5 Jun 2019 09:11:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:59464 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728003AbfFENLI (ORCPT ); Wed, 5 Jun 2019 09:11:08 -0400 Received: from tleilax.poochiereds.net (cpe-71-70-156-158.nc.res.rr.com [71.70.156.158]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7235C20883; Wed, 5 Jun 2019 13:11:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559740268; bh=VyMGwNHbNW332OuFcFpZGqUXUtoxNFAGNBioKLMK8Mw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xRd9klNLKP/4OtFpLbE7+mmQdxV+W1YWOHiDYh7SMYOEBkdaYYYks59z5/99+eMdR TCC+1XIU3dr9ltjb4brRtnTO1cg+Spgf0o9qKaE9sMsHRfiY+cLW93u3ddzUW3FJh7 E6lFoVF8oM2GVirjhrWtvhaM7qpnGMQuHObIqmsg= From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: idryomov@redhat.com, zyan@redhat.com, sage@redhat.com Subject: [RFC PATCH 5/9] libceph: fix watch_item_t decoding to use ceph_decode_entity_addr Date: Wed, 5 Jun 2019 09:10:58 -0400 Message-Id: <20190605131102.13529-6-jlayton@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190605131102.13529-1-jlayton@kernel.org> References: <20190605131102.13529-1-jlayton@kernel.org> MIME-Version: 1.0 Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP While we're in there, let's also fix up the decoder to do proper bounds checking. Signed-off-by: Jeff Layton --- net/ceph/osd_client.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index e6d31e0f0289..f8a4d29ef688 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -4914,20 +4914,26 @@ static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) ret = ceph_start_decoding(p, end, 2, "watch_item_t", &struct_v, &struct_len); if (ret) - return ret; + goto bad; + + ret = -EINVAL; + ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); + ceph_decode_64_safe(p, end, item->cookie, bad); + ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ - ceph_decode_copy(p, &item->name, sizeof(item->name)); - item->cookie = ceph_decode_64(p); - *p += 4; /* skip timeout_seconds */ if (struct_v >= 2) { - ceph_decode_copy(p, &item->addr, sizeof(item->addr)); - ceph_decode_addr(&item->addr); + ret = ceph_decode_entity_addr(p, end, &item->addr); + if (ret) + goto bad; + } else { + ret = 0; } dout("%s %s%llu cookie %llu addr %s\n", __func__, ENTITY_NAME(item->name), item->cookie, ceph_pr_addr(&item->addr)); - return 0; +bad: + return ret; } static int decode_watchers(void **p, void *end,