From patchwork Fri Apr 27 17:07:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anatoly Burakov X-Patchwork-Id: 39132 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 49308D0C9; Fri, 27 Apr 2018 19:07:22 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id CC7E2AAF1 for ; Fri, 27 Apr 2018 19:07:14 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Apr 2018 10:07:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,335,1520924400"; d="scan'208";a="54187073" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga002.jf.intel.com with ESMTP; 27 Apr 2018 10:07:12 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id w3RH7BgO026438; Fri, 27 Apr 2018 18:07:11 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id w3RH7BZ8023481; Fri, 27 Apr 2018 18:07:11 +0100 Received: (from aburakov@localhost) by sivswdev01.ir.intel.com with LOCAL id w3RH7B8p023477; Fri, 27 Apr 2018 18:07:11 +0100 From: Anatoly Burakov To: dev@dpdk.org Cc: thomas@monjalon.net, bruce.richardson@intel.com, anatoly.burakov@intel.com Date: Fri, 27 Apr 2018 18:07:04 +0100 Message-Id: <6aaf607fae1ee7c5c80000891d63f6b7992ab33b.1524848343.git.anatoly.burakov@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [PATCH v4 3/9] mem: fix potential double close X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" We were closing descriptor before checking if mapping has failed, but if it did, we did a second close afterwards. Fix it by moving closing descriptor to after we've done all error checks. Coverity issue: 272560 Fixes: 2a04139f66b4 ("eal: add single file segments option") Cc: anatoly.burakov@intel.com Signed-off-by: Anatoly Burakov Acked-by: Bruce Richardson --- Notes: v4: - Moved fd close to until after all error checks are done lib/librte_eal/linuxapp/eal/eal_memalloc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/lib/librte_eal/linuxapp/eal/eal_memalloc.c b/lib/librte_eal/linuxapp/eal/eal_memalloc.c index 1f553dd..3391ed1 100644 --- a/lib/librte_eal/linuxapp/eal/eal_memalloc.c +++ b/lib/librte_eal/linuxapp/eal/eal_memalloc.c @@ -458,9 +458,6 @@ alloc_seg(struct rte_memseg *ms, void *addr, int socket_id, */ void *va = mmap(addr, alloc_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd, map_offset); - /* for non-single file segments, we can close fd here */ - if (!internal_config.single_file_segments) - close(fd); if (va == MAP_FAILED) { RTE_LOG(DEBUG, EAL, "%s(): mmap() failed: %s\n", __func__, @@ -502,6 +499,10 @@ alloc_seg(struct rte_memseg *ms, void *addr, int socket_id, (unsigned int)(alloc_sz >> 20)); goto mapped; } + /* for non-single file segments, we can close fd here */ + if (!internal_config.single_file_segments) + close(fd); + *(int *)addr = *(int *)addr; ms->addr = addr;