From nobody Mon Feb 9 18:19:10 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1486380644114304.5928221153125; Mon, 6 Feb 2017 03:30:44 -0800 (PST) Received: from localhost ([::1]:46761 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cahVI-0003Rx-05 for importer@patchew.org; Mon, 06 Feb 2017 06:30:40 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43109) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cahTN-0002LE-BT for qemu-devel@nongnu.org; Mon, 06 Feb 2017 06:28:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cahTJ-0002wa-QO for qemu-devel@nongnu.org; Mon, 06 Feb 2017 06:28:41 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35196) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cahTJ-0002vd-LS for qemu-devel@nongnu.org; Mon, 06 Feb 2017 06:28:37 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D1AC2C04B327; Mon, 6 Feb 2017 11:28:37 +0000 (UTC) Received: from nilsson.home.kraxel.org (ovpn-116-97.ams2.redhat.com [10.36.116.97]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6A2E116A6B; Mon, 6 Feb 2017 11:28:37 +0000 (UTC) Received: by nilsson.home.kraxel.org (Postfix, from userid 500) id 1106C80A74; Mon, 6 Feb 2017 12:28:34 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Mon, 6 Feb 2017 12:28:20 +0100 Message-Id: <1486380501-13431-9-git-send-email-kraxel@redhat.com> In-Reply-To: <1486380501-13431-1-git-send-email-kraxel@redhat.com> References: <1486380501-13431-1-git-send-email-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Mon, 06 Feb 2017 11:28:37 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 8/9] usb: ccid: check ccid apdu length X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Prasad J Pandit , Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Prasad J Pandit CCID device emulator uses Application Protocol Data Units(APDU) to exchange command and responses to and from the host. The length in these units couldn't be greater than 65536. Add check to ensure the same. It'd also avoid potential integer overflow in emulated_apdu_from_guest. Reported-by: Li Qiang Signed-off-by: Prasad J Pandit Message-id: 20170202192228.10847-1-ppandit@redhat.com Signed-off-by: Gerd Hoffmann --- hw/usb/dev-smartcard-reader.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/usb/dev-smartcard-reader.c b/hw/usb/dev-smartcard-reader.c index 89e11b6..1325ea1 100644 --- a/hw/usb/dev-smartcard-reader.c +++ b/hw/usb/dev-smartcard-reader.c @@ -967,7 +967,7 @@ static void ccid_on_apdu_from_guest(USBCCIDState *s, CC= ID_XferBlock *recv) DPRINTF(s, 1, "%s: seq %d, len %d\n", __func__, recv->hdr.bSeq, len); ccid_add_pending_answer(s, (CCID_Header *)recv); - if (s->card) { + if (s->card && len <=3D BULK_OUT_DATA_SIZE) { ccid_card_apdu_from_guest(s->card, recv->abData, len); } else { DPRINTF(s, D_WARN, "warning: discarded apdu\n"); --=20 1.8.3.1