From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: Re: Re: KMSAN: uninit-value in _copy_to_iter (2) Date: Thu, 07 Jun 2018 08:38:52 -0700 Message-ID: <0000000000009b46ec056e0f1460@google.com> References: <20180607183627-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Cc: avagin@openvz.org, davem@davemloft.net, dingtianhong@huawei.com, edumazet@google.com, elena.reshetova@intel.com, jasowang@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, matthew@mjdsystems.ca, mingo@kernel.org, mst@redhat.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, virtualization@lists.linux-foundation.org, willemb@google.com To: "Michael S. Tsirkin" Return-path: In-Reply-To: <20180607183627-mutt-send-email-mst@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org > #syz test: https://github.com/google/kmsan.git/master > d2d741e5d1898dfde1a75ea3d29a9a3e2edf0617 "https://github.com/google/kmsan.git/master" does not look like a valid git repo address. > Subject: vhost: fix info leak > Fixes: CVE-2018-1118 > Signed-off-by: Michael S. Tsirkin > --- > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index f0be5f35ab28..9beefa6ed1ce 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -2345,6 +2345,9 @@ struct vhost_msg_node *vhost_new_msg(struct > vhost_virtqueue *vq, int type) > struct vhost_msg_node *node = kmalloc(sizeof *node, GFP_KERNEL); > if (!node) > return NULL; > + > + /* Make sure all padding within the structure is initialized. */ > + memset(&node->msg, 0, sizeof node->msg); > node->vq = vq; > node->msg.type = type; > return node;