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Tue, 23 Feb 2021 09:50:12 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-418-MrRbQJ2FMiCCxKvVIi13PA-1; Tue, 23 Feb 2021 09:50:05 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 51426879531; Tue, 23 Feb 2021 14:48:47 +0000 (UTC) Received: from localhost (ovpn-114-203.ams2.redhat.com [10.36.114.203]) by smtp.corp.redhat.com (Postfix) with ESMTP id 037885D6A1; Tue, 23 Feb 2021 14:48:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614091809; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3+kJfwqJ3IJChs+zdqeGKxCB+0AgtHQs52eDWeAuRgQ=; b=IduJ+wZGP7AWWR5M3HDbBWXa6GPq+w4MPDpxTTmZ1GvC7Aj1xwIJvBQGuwpREhlCa2Q3Lb EtAtd7E+C+/L6YF391oLxFEEg6ln4R1w3lNV76Oh/mqGGR2IBs0ZO0YPlKfsRPMVD31TfA HstuwWMAoKFGuFDpUyqWvkTUEXBdRj4= X-MC-Unique: MrRbQJ2FMiCCxKvVIi13PA-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v3 12/12] block/export: port virtio-blk read/write range check Date: Tue, 23 Feb 2021 14:46:53 +0000 Message-Id: <20210223144653.811468-13-stefanha@redhat.com> In-Reply-To: <20210223144653.811468-1-stefanha@redhat.com> References: <20210223144653.811468-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MIME_BASE64_TEXT=1.741, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Laurent Vivier , Thomas Huth , qemu-block@nongnu.org, "Michael S. Tsirkin" , Peter Maydell , Coiby Xu , Max Reitz , Stefan Hajnoczi , Paolo Bonzini , Raphael Norwitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Check that the sector number and byte count are valid. Signed-off-by: Stefan Hajnoczi --- block/export/vhost-user-blk-server.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/block/export/vhost-user-blk-server.c b/block/export/vhost-user= -blk-server.c index 04044228d4..cb5d896b7b 100644 --- a/block/export/vhost-user-blk-server.c +++ b/block/export/vhost-user-blk-server.c @@ -209,6 +209,8 @@ static void coroutine_fn vu_blk_virtio_process_req(void= *opaque) switch (type & ~VIRTIO_BLK_T_BARRIER) { case VIRTIO_BLK_T_IN: case VIRTIO_BLK_T_OUT: { + QEMUIOVector qiov; + int64_t offset; ssize_t ret =3D 0; bool is_write =3D type & VIRTIO_BLK_T_OUT; req->sector_num =3D le64_to_cpu(req->out.sector); @@ -218,13 +220,24 @@ static void coroutine_fn vu_blk_virtio_process_req(vo= id *opaque) break; } =20 - int64_t offset =3D req->sector_num << VIRTIO_BLK_SECTOR_BITS; - QEMUIOVector qiov; if (is_write) { qemu_iovec_init_external(&qiov, out_iov, out_num); - ret =3D blk_co_pwritev(blk, offset, qiov.size, &qiov, 0); } else { qemu_iovec_init_external(&qiov, in_iov, in_num); + } + + if (unlikely(!vu_blk_sect_range_ok(vexp, + req->sector_num, + qiov.size))) { + req->in->status =3D VIRTIO_BLK_S_IOERR; + break; + } + + offset =3D req->sector_num << VIRTIO_BLK_SECTOR_BITS; + + if (is_write) { + ret =3D blk_co_pwritev(blk, offset, qiov.size, &qiov, 0); + } else { ret =3D blk_co_preadv(blk, offset, qiov.size, &qiov, 0); } if (ret >=3D 0) { --=20 2.29.2