From patchwork Tue Feb 14 06:11:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 1742038 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=ARszYFi4; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4PG9qv588Nz23qt for ; Tue, 14 Feb 2023 17:13:15 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pRoY9-0001zD-K4; Tue, 14 Feb 2023 01:12:21 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pRoY8-0001z4-0g for qemu-devel@nongnu.org; Tue, 14 Feb 2023 01:12:20 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pRoY6-0007uI-Ex for qemu-devel@nongnu.org; Tue, 14 Feb 2023 01:12:19 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676355137; 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=TwNHaHxJN+PwwFzTbjQzvXD6UyPedYFtyj+WeZcwq8M=; b=ARszYFi4709vl2YeTZ9ICwDzN5GOKKmINR56dkiauTwr1epgPtKj2U/w4pL6S88isY2+GV rbra7611gv/RXWfbyEqgLv+5aqCiat+VySHYA7FLzARnpdhEgznP8UQhkdGDd+Buj+uksv XLbehmDzu49YBet7A/dKSsyV6jWbxjE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-310-1X0qDLlnNw6WJcFWYwANcg-1; Tue, 14 Feb 2023 01:12:14 -0500 X-MC-Unique: 1X0qDLlnNw6WJcFWYwANcg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4CEFA811E9C; Tue, 14 Feb 2023 06:12:14 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-89.pek2.redhat.com [10.72.12.89]) by smtp.corp.redhat.com (Postfix) with ESMTP id 57007140EBF6; Tue, 14 Feb 2023 06:12:12 +0000 (UTC) From: Jason Wang To: peter.maydell@linaro.org, qemu-devel@nongnu.org Cc: Qiang Liu , Jason Wang Subject: [PULL 08/10] hw/net/can/xlnx-zynqmp-can: fix assertion failures in transfer_fifo() Date: Tue, 14 Feb 2023 14:11:38 +0800 Message-Id: <20230214061140.36696-9-jasowang@redhat.com> In-Reply-To: <20230214061140.36696-1-jasowang@redhat.com> References: <20230214061140.36696-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Qiang Liu Check fifos before poping data from and pushing data into it. Fixes: 98e5d7a2b726 ("hw/net/can: Introduce Xilinx ZynqMP CAN controller") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1425 Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1427 Reported-by: Qiang Liu Signed-off-by: Qiang Liu Signed-off-by: Jason Wang --- hw/net/can/xlnx-zynqmp-can.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/net/can/xlnx-zynqmp-can.c b/hw/net/can/xlnx-zynqmp-can.c index e93e6c5..55d3221 100644 --- a/hw/net/can/xlnx-zynqmp-can.c +++ b/hw/net/can/xlnx-zynqmp-can.c @@ -451,6 +451,12 @@ static void transfer_fifo(XlnxZynqMPCANState *s, Fifo32 *fifo) } while (!fifo32_is_empty(fifo)) { + if (fifo32_num_used(fifo) < (4 * CAN_FRAME_SIZE)) { + g_autofree char *path = object_get_canonical_path(OBJECT(s)); + qemu_log_mask(LOG_GUEST_ERROR, "%s: data left in the fifo is not" + " enough for transfer.\n", path); + break; + } for (i = 0; i < CAN_FRAME_SIZE; i++) { data[i] = fifo32_pop(fifo); } @@ -463,7 +469,8 @@ static void transfer_fifo(XlnxZynqMPCANState *s, Fifo32 *fifo) * acknowledged. The XlnxZynqMPCAN core receives any message * that it transmits. */ - if (fifo32_is_full(&s->rx_fifo)) { + if (fifo32_is_full(&s->rx_fifo) || + (fifo32_num_free(&s->rx_fifo) < (4 * CAN_FRAME_SIZE))) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXOFLW, 1); } else { for (i = 0; i < CAN_FRAME_SIZE; i++) {