From patchwork Thu Jul 14 07:02:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kinga Tanska X-Patchwork-Id: 12917353 X-Patchwork-Delegate: i@coly.li 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 72CA8C433EF for ; Thu, 14 Jul 2022 06:55:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233796AbiGNGzO (ORCPT ); Thu, 14 Jul 2022 02:55:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233723AbiGNGzN (ORCPT ); Thu, 14 Jul 2022 02:55:13 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51D652A97D for ; Wed, 13 Jul 2022 23:55:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657781712; x=1689317712; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hmSSLvxVIX+QfY6uYQD1ge+EV4339bYBR/lhYq356hA=; b=ParkjOOpeEuaQpmuEDI41fm9YLm7YEMHDWsoAGqYbsLA8z4SYOR9Smm0 /38wiyM6KvCWnuA7XS3WjK7sfY/LEsk/PWBpWE7wrWk4BiDtWWEsmiZBw S2nsuQ399ECT3p9KWI52XjageU3l7If6fDE44Cu3m2BnHAqG2mxoiMsOv kREFqbTxLUQzuR/gMVWXC1kC7Zv5Zek0uIG0Lv2ZhkD2rGE4WwveNUYug f15UzaSuGpEB/PHpEs3rSMqXwaMooMSSwcNMvbz3YOE3iAye58JWIWjhH QXeoHioI/iL7OZZy5nvtNLxfgOxoU7ECKS9Ot7BfOu//OMXItQ0E0Lkg0 g==; X-IronPort-AV: E=McAfee;i="6400,9594,10407"; a="265845872" X-IronPort-AV: E=Sophos;i="5.92,269,1650956400"; d="scan'208";a="265845872" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jul 2022 23:55:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.92,269,1650956400"; d="scan'208";a="570945163" Received: from unknown (HELO localhost.igk.intel.com) ([10.102.102.97]) by orsmga006.jf.intel.com with ESMTP; 13 Jul 2022 23:55:10 -0700 From: Kinga Tanska To: linux-raid@vger.kernel.org Cc: jes@trained-monkey.org, colyli@suse.de Subject: [PATCH 2/2] Monitor: use snprintf to fill device name Date: Thu, 14 Jul 2022 09:02:11 +0200 Message-Id: <20220714070211.9941-3-kinga.tanska@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20220714070211.9941-1-kinga.tanska@intel.com> References: <20220714070211.9941-1-kinga.tanska@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Safe string functions are propagated in Monitor.c. Signed-off-by: Kinga Tanska --- Monitor.c | 37 ++++++++++++++----------------------- 1 file changed, 14 insertions(+), 23 deletions(-) diff --git a/Monitor.c b/Monitor.c index a5b11ae2..93f36ac0 100644 --- a/Monitor.c +++ b/Monitor.c @@ -33,8 +33,8 @@ #endif struct state { - char *devname; - char devnm[32]; /* to sync with mdstat info */ + char devname[MD_NAME_MAX + sizeof("/dev/md/")]; /* length of "/dev/md/" + device name + terminating byte*/ + char devnm[MD_NAME_MAX]; /* to sync with mdstat info */ unsigned int utime; int err; char *spare_group; @@ -45,9 +45,9 @@ struct state { int devstate[MAX_DISKS]; dev_t devid[MAX_DISKS]; int percent; - char parent_devnm[32]; /* For subarray, devnm of parent. - * For others, "" - */ + char parent_devnm[MD_NAME_MAX]; /* For subarray, devnm of parent. + * For others, "" + */ struct supertype *metadata; struct state *subarray;/* for a container it is a link to first subarray * for a subarray it is a link to next subarray @@ -187,15 +187,8 @@ int Monitor(struct mddev_dev *devlist, continue; st = xcalloc(1, sizeof *st); - if (mdlist->devname[0] == '/') - st->devname = xstrdup(mdlist->devname); - else { - /* length of "/dev/md/" + device name + terminating byte */ - size_t _len = sizeof("/dev/md/") + strnlen(mdlist->devname, PATH_MAX); - - st->devname = xcalloc(_len, sizeof(char)); - snprintf(st->devname, _len, "/dev/md/%s", mdlist->devname); - } + snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), + "/dev/md/%s", basename(mdlist->devname)); if (!is_mddev(mdlist->devname)) return 1; st->next = statelist; @@ -218,7 +211,7 @@ int Monitor(struct mddev_dev *devlist, st = xcalloc(1, sizeof *st); mdlist = conf_get_ident(dv->devname); - st->devname = xstrdup(dv->devname); + snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", dv->devname); st->next = statelist; st->devnm[0] = 0; st->percent = RESYNC_UNKNOWN; @@ -301,7 +294,6 @@ int Monitor(struct mddev_dev *devlist, for (stp = &statelist; (st = *stp) != NULL; ) { if (st->from_auto && st->err > 5) { *stp = st->next; - free(st->devname); free(st->spare_group); free(st); } else @@ -554,7 +546,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat, goto disappeared; if (st->devnm[0] == 0) - strcpy(st->devnm, fd2devnm(fd)); + snprintf(st->devnm, MD_NAME_MAX, "%s", fd2devnm(fd)); for (mse2 = mdstat; mse2; mse2 = mse2->next) if (strcmp(mse2->devnm, st->devnm) == 0) { @@ -684,7 +676,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat, strncmp(mse->metadata_version, "external:", 9) == 0 && is_subarray(mse->metadata_version+9)) { char *sl; - strcpy(st->parent_devnm, mse->metadata_version + 10); + snprintf(st->parent_devnm, MD_NAME_MAX, "%s", mse->metadata_version + 10); sl = strchr(st->parent_devnm, '/'); if (sl) *sl = 0; @@ -772,14 +764,13 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist, continue; } - st->devname = xstrdup(name); + snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", name); if ((fd = open(st->devname, O_RDONLY)) < 0 || md_get_array_info(fd, &array) < 0) { /* no such array */ if (fd >= 0) close(fd); put_md_name(st->devname); - free(st->devname); if (st->metadata) { st->metadata->ss->free_super(st->metadata); free(st->metadata); @@ -791,7 +782,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist, st->next = *statelist; st->err = 1; st->from_auto = 1; - strcpy(st->devnm, mse->devnm); + snprintf(st->devnm, MD_NAME_MAX, "%s", mse->devnm); st->percent = RESYNC_UNKNOWN; st->expected_spares = -1; if (mse->metadata_version && @@ -799,8 +790,8 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist, "external:", 9) == 0 && is_subarray(mse->metadata_version+9)) { char *sl; - strcpy(st->parent_devnm, - mse->metadata_version+10); + snprintf(st->parent_devnm, MD_NAME_MAX, + "%s", mse->metadata_version + 10); sl = strchr(st->parent_devnm, '/'); *sl = 0; } else