From mboxrd@z Thu Jan 1 00:00:00 1970 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 5B959C43334 for ; Thu, 30 Jun 2022 11:53:34 +0000 (UTC) Received: from localhost ([::1]:34610 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o6sjl-0000yc-Fp for qemu-devel@archiver.kernel.org; Thu, 30 Jun 2022 07:53:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33522) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o6sHo-0007Q0-Ik; Thu, 30 Jun 2022 07:24:40 -0400 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3]:54405 helo=gandalf.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o6sHm-000201-GK; Thu, 30 Jun 2022 07:24:40 -0400 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4LYbZs38Yrz4xXF; Thu, 30 Jun 2022 21:24:37 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4LYbZq4gfwz4xD5; Thu, 30 Jun 2022 21:24:35 +1000 (AEST) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: Peter Maydell , Richard Henderson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 07/27] aspeed/smc: Fix potential overflow Date: Thu, 30 Jun 2022 13:23:51 +0200 Message-Id: <20220630112411.1474431-8-clg@kaod.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220630112411.1474431-1-clg@kaod.org> References: <20220630112411.1474431-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=N4Bw=XF=kaod.org=clg@ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Coverity warns that "ssi_transfer(s->spi, 0U) << 8 * i" might overflow because the expression is evaluated using 32-bit arithmetic and then used in a context expecting a uint64_t. Fixes: Coverity CID 1487244 Message-Id: <20220628165512.1133590-1-clg@kaod.org> Signed-off-by: Cédric Le Goater --- hw/ssi/aspeed_smc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c index 68aa697164d4..faed7e0cbe17 100644 --- a/hw/ssi/aspeed_smc.c +++ b/hw/ssi/aspeed_smc.c @@ -488,7 +488,7 @@ static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr, unsigned size) switch (aspeed_smc_flash_mode(fl)) { case CTRL_USERMODE: for (i = 0; i < size; i++) { - ret |= ssi_transfer(s->spi, 0x0) << (8 * i); + ret |= (uint64_t) ssi_transfer(s->spi, 0x0) << (8 * i); } break; case CTRL_READMODE: @@ -497,7 +497,7 @@ static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr, unsigned size) aspeed_smc_flash_setup(fl, addr); for (i = 0; i < size; i++) { - ret |= ssi_transfer(s->spi, 0x0) << (8 * i); + ret |= (uint64_t) ssi_transfer(s->spi, 0x0) << (8 * i); } aspeed_smc_flash_unselect(fl); -- 2.35.3