From patchwork Tue Jun 25 07:07:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jamin Lin X-Patchwork-Id: 13710722 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B80EEC30653 for ; Tue, 25 Jun 2024 07:08:49 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sM0HQ-000111-5q; Tue, 25 Jun 2024 03:07:52 -0400 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 1sM0HO-00010k-VZ; Tue, 25 Jun 2024 03:07:50 -0400 Received: from mail.aspeedtech.com ([211.20.114.72] helo=TWMBX01.aspeed.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sM0HN-0007Jh-HA; Tue, 25 Jun 2024 03:07:50 -0400 Received: from TWMBX01.aspeed.com (192.168.0.62) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.12; Tue, 25 Jun 2024 15:07:41 +0800 Received: from localhost.localdomain (192.168.10.10) by TWMBX01.aspeed.com (192.168.0.62) with Microsoft SMTP Server id 15.2.1258.12 via Frontend Transport; Tue, 25 Jun 2024 15:07:41 +0800 To: =?utf-8?q?C=C3=A9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Andrew Jeffery , "Joel Stanley" , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: , =?utf-8?q?C=C3=A9dric_Le_Goater?= Subject: [PATCH v3 1/2] aspeed/soc: Fix possible divide by zero Date: Tue, 25 Jun 2024 15:07:39 +0800 Message-ID: <20240625070741.2852946-2-jamin_lin@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240625070741.2852946-1-jamin_lin@aspeedtech.com> References: <20240625070741.2852946-1-jamin_lin@aspeedtech.com> MIME-Version: 1.0 Received-SPF: pass client-ip=211.20.114.72; envelope-from=jamin_lin@aspeedtech.com; helo=TWMBX01.aspeed.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_FAIL=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: , Reply-to: Jamin Lin X-Patchwork-Original-From: Jamin Lin via From: Jamin Lin Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Coverity reports a possible DIVIDE_BY_ZERO issue regarding the "ram_size" object property. This can not happen because RAM has predefined valid sizes per SoC. Nevertheless, add a test to close the issue. Fixes: Coverity CID 1547113 Signed-off-by: Jamin Lin Reviewed-by: Cédric Le Goater [ clg: Rewrote commit log ] Signed-off-by: Cédric Le Goater --- hw/arm/aspeed_ast27x0.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c index b6876b4862..18e6a8b10c 100644 --- a/hw/arm/aspeed_ast27x0.c +++ b/hw/arm/aspeed_ast27x0.c @@ -211,6 +211,8 @@ static void aspeed_ram_capacity_write(void *opaque, hwaddr addr, uint64_t data, ram_size = object_property_get_uint(OBJECT(&s->sdmc), "ram-size", &error_abort); + assert(ram_size > 0); + /* * Emulate ddr capacity hardware behavior. * If writes the data to the address which is beyond the ram size,