From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 90552A0679 for ; Thu, 4 Apr 2019 08:04:26 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A4B2E5424; Thu, 4 Apr 2019 08:04:25 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id DB0914F91; Thu, 4 Apr 2019 08:04:23 +0200 (CEST) X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Apr 2019 23:04:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,306,1549958400"; d="scan'208";a="220419760" Received: from dpdk-tbie.sh.intel.com ([10.67.104.173]) by orsmga001.jf.intel.com with ESMTP; 03 Apr 2019 23:04:21 -0700 Date: Thu, 4 Apr 2019 14:03:54 +0800 From: Tiwei Bie To: Mohammad Abdul Awal Cc: dev@dpdk.org, maxime.coquelin@redhat.com, zhihong.wang@intel.com, stable@dpdk.org Message-ID: <20190404060354.GA5423@dpdk-tbie.sh.intel.com> References: <20190403160823.1337-1-mohammad.abdul.awal@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline In-Reply-To: <20190403160823.1337-1-mohammad.abdul.awal@intel.com> User-Agent: Mutt/1.9.4 (2018-02-28) Subject: Re: [dpdk-dev] [PATCH 3/3] vhost: fix null pointer checking 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" Message-ID: <20190404060354.SkmVMwVRz6VqmeLslbzRwnrJAF4tn4rJKo77ha1297Y@z> On Wed, Apr 03, 2019 at 05:08:23PM +0100, Mohammad Abdul Awal wrote: > Null value for parameters will cause segfault. > > Fuxes: d7280c9fff ("vhost: support selective datapath") s/Fuxes/Fixes/ > Fixes: 72e8543093 ("vhost: add external message handling to the API") Should be 72e8543093df ("vhost: add API to get MTU value") ? > Fixes: a277c71598 ("vhost: refactor code structure") > Fixes: ca33faf9ef ("vhost: introduce API to fetch negotiated features") > Fixes: eb32247457 ("vhost: export guest memory regions") > Fixes: 40ef286f23 ("vhost: export vhost vring info") > Fixes: bd2e0c3fe5 ("vhost: add APIs for live migration") > Fixes: 0b8572a0c1 ("vhost: add external message handling to the API") > Cc: stable@dpdk.org > > Signed-off-by: Mohammad Abdul Awal > --- > lib/librte_vhost/vdpa.c | 5 ++++- > lib/librte_vhost/vhost.c | 16 ++++++++-------- It would be better to also check the `path` from user input, e.g. https://github.com/DPDK/dpdk/blob/3ed37e09342cfe416eb2c930d960ba47143af697/lib/librte_vhost/socket.c#L561 In above case, it can be done in find_vhost_user_socket() > 2 files changed, 12 insertions(+), 9 deletions(-) > > diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c > index 321e11f17..814082479 100644 > --- a/lib/librte_vhost/vdpa.c > +++ b/lib/librte_vhost/vdpa.c > @@ -49,7 +49,7 @@ rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr, > char device_name[MAX_VDPA_NAME_LEN]; > int i; > > - if (vdpa_device_num >= MAX_VHOST_DEVICE) > + if (vdpa_device_num >= MAX_VHOST_DEVICE || !addr || !ops) > return -1; > > for (i = 0; i < MAX_VHOST_DEVICE; i++) { > @@ -99,6 +99,9 @@ rte_vdpa_find_device_id(struct rte_vdpa_dev_addr *addr) > struct rte_vdpa_device *dev; > int i; > > + if (!addr) > + return -1; > + > for (i = 0; i < MAX_VHOST_DEVICE; ++i) { > dev = vdpa_devices[i]; > if (dev && is_same_vdpa_device(&dev->addr, addr)) > diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c > index e480aeac9..27fe87188 100644 > --- a/lib/librte_vhost/vhost.c > +++ b/lib/librte_vhost/vhost.c > @@ -447,7 +447,7 @@ rte_vhost_get_mtu(int vid, uint16_t *mtu) > { > struct virtio_net *dev = get_device(vid); > > - if (!dev) > + if (!dev || !mtu) > return -ENODEV; > > if (!(dev->flags & VIRTIO_DEV_READY)) > @@ -515,7 +515,7 @@ rte_vhost_get_ifname(int vid, char *buf, size_t len) > { > struct virtio_net *dev = get_device(vid); > > - if (dev == NULL) > + if (dev == NULL || !buf) It would be better to do the check in this way: (!dev || !buf) for consistency. Thanks for the work! Tiwei > return -1; > > len = RTE_MIN(len, sizeof(dev->ifname)); > @@ -532,7 +532,7 @@ rte_vhost_get_negotiated_features(int vid, uint64_t *features) > struct virtio_net *dev; > > dev = get_device(vid); > - if (!dev) > + if (!dev || !features) > return -1; > > *features = dev->features; > @@ -547,7 +547,7 @@ rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem) > size_t size; > > dev = get_device(vid); > - if (!dev) > + if (!dev || !mem) > return -1; > > size = dev->mem->nregions * sizeof(struct rte_vhost_mem_region); > @@ -570,7 +570,7 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, > struct vhost_virtqueue *vq; > > dev = get_device(vid); > - if (!dev) > + if (!dev || !vring) > return -1; > > if (vring_idx >= VHOST_MAX_VRING) > @@ -763,7 +763,7 @@ int rte_vhost_get_log_base(int vid, uint64_t *log_base, > { > struct virtio_net *dev = get_device(vid); > > - if (!dev) > + if (!dev || !log_base || !log_size) > return -1; > > *log_base = dev->log_base; > @@ -777,7 +777,7 @@ int rte_vhost_get_vring_base(int vid, uint16_t queue_id, > { > struct virtio_net *dev = get_device(vid); > > - if (!dev) > + if (!dev || !last_avail_idx || !last_used_idx) > return -1; > > *last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx; > @@ -805,7 +805,7 @@ int rte_vhost_extern_callback_register(int vid, > { > struct virtio_net *dev = get_device(vid); > > - if (!dev) > + if (!dev || !ops) > return -1; > > dev->extern_ops = *ops; > -- > 2.17.1 >