From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCBDAECE560 for ; Mon, 17 Sep 2018 23:04:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D71F2146F for ; Mon, 17 Sep 2018 23:04:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D71F2146F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730798AbeIREdr (ORCPT ); Tue, 18 Sep 2018 00:33:47 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:49100 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727202AbeIREdq (ORCPT ); Tue, 18 Sep 2018 00:33:46 -0400 Received: from localhost (li1825-44.members.linode.com [172.104.248.44]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id BC22BC49; Mon, 17 Sep 2018 23:04:17 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Daniel J. Axtens" , Mauricio Faria de Oliveira , Jens Axboe , Sasha Levin Subject: [PATCH 4.14 080/126] partitions/aix: append null character to print data from disk Date: Tue, 18 Sep 2018 00:42:08 +0200 Message-Id: <20180917211709.398570651@linuxfoundation.org> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180917211703.481236999@linuxfoundation.org> References: <20180917211703.481236999@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mauricio Faria de Oliveira [ Upstream commit d43fdae7bac2def8c4314b5a49822cb7f08a45f1 ] Even if properly initialized, the lvname array (i.e., strings) is read from disk, and might contain corrupt data (e.g., lack the null terminating character for strings). So, make sure the partition name string used in pr_warn() has the null terminating character. Fixes: 6ceea22bbbc8 ("partitions: add aix lvm partition support files") Suggested-by: Daniel J. Axtens Signed-off-by: Mauricio Faria de Oliveira Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- block/partitions/aix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/block/partitions/aix.c +++ b/block/partitions/aix.c @@ -282,10 +282,14 @@ int aix_partition(struct parsed_partitio next_lp_ix += 1; } for (i = 0; i < state->limit; i += 1) - if (lvip[i].pps_found && !lvip[i].lv_is_contiguous) + if (lvip[i].pps_found && !lvip[i].lv_is_contiguous) { + char tmp[sizeof(n[i].name) + 1]; // null char + + snprintf(tmp, sizeof(tmp), "%s", n[i].name); pr_warn("partition %s (%u pp's found) is " "not contiguous\n", - n[i].name, lvip[i].pps_found); + tmp, lvip[i].pps_found); + } kfree(pvd); } kfree(n);