From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 0E697A2E1B for ; Wed, 4 Sep 2019 14:05:51 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E29FC1EDC8; Wed, 4 Sep 2019 14:05:41 +0200 (CEST) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by dpdk.org (Postfix) with ESMTP id 1978E1ED8A; Wed, 4 Sep 2019 14:05:38 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Sep 2019 05:05:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,465,1559545200"; d="scan'208";a="383448566" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga006.fm.intel.com with ESMTP; 04 Sep 2019 05:05:36 -0700 Received: from wgcvswdev001.ir.intel.com (wgcvswdev001.ir.intel.com [10.102.246.100]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id x84C5Zla023728; Wed, 4 Sep 2019 13:05:35 +0100 Received: from wgcvswdev001.ir.intel.com (localhost [127.0.0.1]) by wgcvswdev001.ir.intel.com with ESMTP id x84C4xMf002418; Wed, 4 Sep 2019 13:04:59 +0100 Received: (from tchaitax@localhost) by wgcvswdev001.ir.intel.com with œ id x84C4xhf002413; Wed, 4 Sep 2019 13:04:59 +0100 From: Chaitanya Babu Talluri To: dev@dpdk.org Cc: reshma.pattan@intel.com, jananeex.m.parthasarathy@intel.com, anatoly.burakov@intel.com, Chaitanya Babu Talluri , stable@dpdk.org Date: Wed, 4 Sep 2019 13:04:40 +0100 Message-Id: <1567598682-2225-3-git-send-email-tallurix.chaitanya.babu@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: <1566907031-2105-1-git-send-email-tallurix.chaitanya.babu@intel.com> References: <1566907031-2105-1-git-send-email-tallurix.chaitanya.babu@intel.com> Subject: [dpdk-dev] [PATCH v4 2/4] lib/eal: fix vfio unmap that succeeds unexpectedly 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" Unmapping page with a VA that is found in the list of current mappings will succeed even if the IOVA for the chunk that is being unmapped,is mismatched. Fix it by checking if IOVA address matches the expected IOVA address exactly. Fixes: 73a6390859 ("vfio: allow to map other memory regions") Cc: stable@dpdk.org Signed-off-by: Chaitanya Babu Talluri --- lib/librte_eal/linux/eal/eal_vfio.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/lib/librte_eal/linux/eal/eal_vfio.c b/lib/librte_eal/linux/eal/eal_vfio.c index 104912077..04c284cb2 100644 --- a/lib/librte_eal/linux/eal/eal_vfio.c +++ b/lib/librte_eal/linux/eal/eal_vfio.c @@ -184,13 +184,13 @@ find_user_mem_map(struct user_mem_maps *user_mem_maps, uint64_t addr, uint64_t iova, uint64_t len) { uint64_t va_end = addr + len; - uint64_t iova_end = iova + len; int i; for (i = 0; i < user_mem_maps->n_maps; i++) { struct user_mem_map *map = &user_mem_maps->maps[i]; uint64_t map_va_end = map->addr + map->len; - uint64_t map_iova_end = map->iova + map->len; + uint64_t diff_addr_len = addr - map->addr; + uint64_t expected_iova = map->iova + diff_addr_len; /* check start VA */ if (addr < map->addr || addr >= map_va_end) @@ -199,11 +199,10 @@ find_user_mem_map(struct user_mem_maps *user_mem_maps, uint64_t addr, if (va_end <= map->addr || va_end > map_va_end) continue; - /* check start IOVA */ - if (iova < map->iova || iova >= map_iova_end) - continue; - /* check if IOVA end is within boundaries */ - if (iova_end <= map->iova || iova_end > map_iova_end) + /* check whether user input iova is in sync with + * user_mem_map entry's iova + */ + if (expected_iova != iova) continue; /* we've found our map */ -- 2.17.2