From patchwork Thu Aug 22 06:52:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11108511 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 56E8F14F7 for ; Thu, 22 Aug 2019 06:54:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3850420870 for ; Thu, 22 Aug 2019 06:54:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3850420870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:38640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i0gzK-0000xI-47 for patchwork-qemu-devel@patchwork.kernel.org; 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Thu, 22 Aug 2019 06:52:43 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 776C197A1; Thu, 22 Aug 2019 08:52:42 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Thu, 22 Aug 2019 08:52:38 +0200 Message-Id: <20190822065242.12496-2-kraxel@redhat.com> In-Reply-To: <20190822065242.12496-1-kraxel@redhat.com> References: <20190822065242.12496-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.63]); Thu, 22 Aug 2019 06:52:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 1/5] usbredir: fix buffer-overflow on vmload 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: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Marc-André Lureau If interface_count is NO_INTERFACE_INFO, let's not access the arrays out-of-bounds. ==994==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x625000243930 at pc 0x5642068086a8 bp 0x7f0b6f9ffa50 sp 0x7f0b6f9ffa40 READ of size 1 at 0x625000243930 thread T0 #0 0x5642068086a7 in usbredir_check_bulk_receiving /home/elmarco/src/qemu/hw/usb/redirect.c:1503 #1 0x56420681301c in usbredir_post_load /home/elmarco/src/qemu/hw/usb/redirect.c:2154 #2 0x5642068a56c2 in vmstate_load_state /home/elmarco/src/qemu/migration/vmstate.c:168 #3 0x56420688e2ac in vmstate_load /home/elmarco/src/qemu/migration/savevm.c:829 #4 0x5642068980cb in qemu_loadvm_section_start_full /home/elmarco/src/qemu/migration/savevm.c:2211 #5 0x564206899645 in qemu_loadvm_state_main /home/elmarco/src/qemu/migration/savevm.c:2395 #6 0x5642068998cf in qemu_loadvm_state /home/elmarco/src/qemu/migration/savevm.c:2467 #7 0x56420685f3e9 in process_incoming_migration_co /home/elmarco/src/qemu/migration/migration.c:449 #8 0x564207106c47 in coroutine_trampoline /home/elmarco/src/qemu/util/coroutine-ucontext.c:115 #9 0x7f0c0604e37f (/lib64/libc.so.6+0x4d37f) Signed-off-by: Marc-André Lureau Reviewed-by: Liam Merwick Reviewed-by: Li Qiang Reviewed-by: Philippe Mathieu-Daudé Message-id: 20190807084048.4258-1-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann --- hw/usb/redirect.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c index fc9fe0c00f4c..be15b9f30334 100644 --- a/hw/usb/redirect.c +++ b/hw/usb/redirect.c @@ -1499,6 +1499,11 @@ static void usbredir_check_bulk_receiving(USBRedirDevice *dev) for (i = EP2I(USB_DIR_IN); i < MAX_ENDPOINTS; i++) { dev->endpoint[i].bulk_receiving_enabled = 0; } + + if (dev->interface_info.interface_count == NO_INTERFACE_INFO) { + return; + } + for (i = 0; i < dev->interface_info.interface_count; i++) { quirks = usb_get_quirks(dev->device_info.vendor_id, dev->device_info.product_id,