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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 067CBC433F5 for ; Thu, 20 Jan 2022 12:30:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242382AbiATMa3 (ORCPT ); Thu, 20 Jan 2022 07:30:29 -0500 Received: from mga07.intel.com ([134.134.136.100]:62801 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232606AbiATMa3 (ORCPT ); Thu, 20 Jan 2022 07:30:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1642681829; x=1674217829; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=n6OcYj1V8RD9Ie+lh2zLjrW3Sv1/WvMJhf4uHfVR10Q=; b=hTB/QJoWA79M4QiLR50M+CKEssBdNqLRDnpbe1aHYvYUQ3JwlPsgH7aG fA+kCpNcdwwjs553oo+jZIxIi0B1aTD9Xyn/gSsvBkFugPfWD2bsBkWNM ZF6kCMgWxU9BuJyfjIFlJIpiVBDbyuykWs0VtYgkXes2CDBrIKMCyv2mF sqMD0WC0Cljyj1UF1QXmxRuhDqABtYly5QOFrK79xcJAQ8OQ1Lk3D+183 IeJU9LCz1r9eAyimFD4VV+5D3jUe2BOjKfKEpuljkPjj4MfhK4ieHXzP8 66cAQ4+PXoJgbYdkHzvd7rmCI/x7wnilLsUwewabt7fzACBlXf9wA9xa3 g==; X-IronPort-AV: E=McAfee;i="6200,9189,10232"; a="308680233" X-IronPort-AV: E=Sophos;i="5.88,302,1635231600"; d="scan'208";a="308680233" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jan 2022 04:30:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,302,1635231600"; d="scan'208";a="518595265" Received: from unknown (HELO localhost.igk.intel.com) ([10.102.102.97]) by orsmga007.jf.intel.com with ESMTP; 20 Jan 2022 04:30:27 -0800 From: Kinga Tanska To: linux-raid@vger.kernel.org Cc: jes@trained-monkey.org Subject: [PATCH] Mdmonitor: Fix segfault and improve logging Date: Thu, 20 Jan 2022 13:32:13 +0100 Message-Id: <20220120123213.17891-1-kinga.tanska@intel.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org From: Oleksandr Shchirskyi Check that devices passed to mdmonitor are md arrays. Also, change logging, so mdmonitor in verbose mode will report its configuration. Signed-off-by: Oleksandr Shchirskyi Signed-off-by: Kinga Tanska --- Monitor.c | 36 ++++++++++++++++++++++++------------ mdadm.h | 1 + mdopen.c | 17 +++++++++++++++++ util.c | 2 +- 4 files changed, 43 insertions(+), 13 deletions(-) diff --git a/Monitor.c b/Monitor.c index f5412299..bd417d04 100644 --- a/Monitor.c +++ b/Monitor.c @@ -137,24 +137,27 @@ int Monitor(struct mddev_dev *devlist, struct mddev_ident *mdlist; int delay_for_event = c->delay; - if (!mailaddr) { + if (!mailaddr) mailaddr = conf_get_mailaddr(); - if (mailaddr && ! c->scan) - pr_err("Monitor using email address \"%s\" from config file\n", - mailaddr); - } - mailfrom = conf_get_mailfrom(); - if (!alert_cmd) { + if (!alert_cmd) alert_cmd = conf_get_program(); - if (alert_cmd && !c->scan) - pr_err("Monitor using program \"%s\" from config file\n", - alert_cmd); - } + + mailfrom = conf_get_mailfrom(); + if (c->scan && !mailaddr && !alert_cmd && !dosyslog) { pr_err("No mail address or alert command - not monitoring.\n"); return 1; } + + if (c->verbose) { + pr_err("Monitor is started with delay %ds\n", c->delay); + if (mailaddr) + pr_err("Monitor using email address %s\n", mailaddr); + if (alert_cmd) + pr_err("Monitor using program %s\n", alert_cmd); + } + info.alert_cmd = alert_cmd; info.mailaddr = mailaddr; info.mailfrom = mailfrom; @@ -183,6 +186,10 @@ int Monitor(struct mddev_dev *devlist, continue; if (strcasecmp(mdlist->devname, "") == 0) continue; + + if (!is_mddev(mdlist->devname)) + return 1; + st = xcalloc(1, sizeof *st); if (mdlist->devname[0] == '/') st->devname = xstrdup(mdlist->devname); @@ -204,7 +211,12 @@ int Monitor(struct mddev_dev *devlist, struct mddev_dev *dv; for (dv = devlist; dv; dv = dv->next) { - struct state *st = xcalloc(1, sizeof *st); + struct state *st; + + if (!is_mddev(dv->devname)) + return 1; + + st = xcalloc(1, sizeof *st); mdlist = conf_get_ident(dv->devname); st->devname = xstrdup(dv->devname); st->next = statelist; diff --git a/mdadm.h b/mdadm.h index 8f8841d8..03151c34 100644 --- a/mdadm.h +++ b/mdadm.h @@ -1607,6 +1607,7 @@ extern int create_mddev(char *dev, char *name, int autof, int trustworthy, #define FOREIGN 2 #define METADATA 3 extern int open_mddev(char *dev, int report_errors); +extern int is_mddev(char *dev); extern int open_container(int fd); extern int metadata_container_matches(char *metadata, char *devnm); extern int metadata_subdev_matches(char *metadata, char *devnm); diff --git a/mdopen.c b/mdopen.c index 245be537..d18c9319 100644 --- a/mdopen.c +++ b/mdopen.c @@ -475,6 +475,23 @@ int open_mddev(char *dev, int report_errors) return mdfd; } +/** + * is_mddev() - check that file name passed is an md device. + * @dev: file name that has to be checked. + * Return: 1 if file passed is an md device, 0 if not. + */ +int is_mddev(char *dev) +{ + int fd = open_mddev(dev, 1); + + if (fd >= 0) { + close(fd); + return 1; + } + + return 0; +} + char *find_free_devnm(int use_partitions) { static char devnm[32]; diff --git a/util.c b/util.c index cdf1da24..003b2f86 100644 --- a/util.c +++ b/util.c @@ -268,7 +268,7 @@ int md_array_active(int fd) * GET_ARRAY_INFO doesn't provide access to the proper state * information, so fallback to a basic check for raid_disks != 0 */ - ret = ioctl(fd, GET_ARRAY_INFO, &array); + ret = md_get_array_info(fd, &array); } return !ret; -- 2.26.2