From nobody Sun Nov 24 14:51:05 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1722949387; cv=none; d=zohomail.com; s=zohoarc; b=hklBxbVyzk4bA4cE2pDn/Y9n++wS40iwR8jrrDC7bqAi+pcaK513iHWR5BUPwLvzJGc083UyI+YMg/sb/QBDVQZFKrwayA7NvspXycHGVi/+kfoHw8ynEZfHQTdj2w4A8Lg+uovgQ1OPh8u80Y5V0CExgL50zQ/JLRHWdlLObPU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1722949387; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=T2BNzJT5/rzAun9sis8NChUOI8pg5PZFtzu3546w0iw=; b=lk6KMDrjFzRO/sjrTTU+DmZWAreTU6Cm9J4fgbp6cyK5uMIGFP4Znv5SURi6IEitI4Mb9mQgjYHkd/72wxYFwFxSgjiOZpqVQK2UC5ewd0pOwQB/dkOU48LwzNq4PilavmLjuHwRCx/s/lXknBwtmy1sLIOpSeJHaN6dLkZL2xM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1722949387488974.2861003281876; Tue, 6 Aug 2024 06:03:07 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sbJhZ-00082e-Jj; Tue, 06 Aug 2024 08:54:10 -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 1sbJhX-0007m2-61 for qemu-devel@nongnu.org; Tue, 06 Aug 2024 08:54:07 -0400 Received: from mail-ej1-x62b.google.com ([2a00:1450:4864:20::62b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sbJhV-0000KX-8J for qemu-devel@nongnu.org; Tue, 06 Aug 2024 08:54:06 -0400 Received: by mail-ej1-x62b.google.com with SMTP id a640c23a62f3a-a7a83a968ddso68664166b.0 for ; Tue, 06 Aug 2024 05:54:04 -0700 (PDT) Received: from m1x-phil.lan (cor91-h02-176-184-30-206.dsl.sta.abo.bbox.fr. [176.184.30.206]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a7dc9ec7575sm539465766b.205.2024.08.06.05.54.02 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Tue, 06 Aug 2024 05:54:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1722948843; x=1723553643; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=T2BNzJT5/rzAun9sis8NChUOI8pg5PZFtzu3546w0iw=; b=luom6VsDG7eJb/MsC2Emug3Dip+gUBk0+vtOqRnikMkTlCSOIYHp8TNeuSQGA3gmuu VXrS5mTGYjt8MLYCHKuTKXxT+eyTD7OnfgyJhT/YsCn8npp/UTuIXrFS7zQuqZ97GqgQ gXcP9D+U/JdccXbFubb7KdSVU0f/sZOJWI048fsCs8Y5ic3ztc/wRwxuWr8aqyWnVSNb L8Bfc8VblSJDMdSyaX1/KlIXLclbHsqRx+KYjMElpasigQud4qpXFqmj1N9HAzbWUIY9 ygUFhhf2UCGEwd6zSAPT4Jj9R3khezu6TCfVzpGx0iSsY42S2sh7snEPNw/+WXZAPkuK 8Nuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722948843; x=1723553643; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=T2BNzJT5/rzAun9sis8NChUOI8pg5PZFtzu3546w0iw=; b=QLCWZr5dDiri+X6FPfCQxfrH4K4XLVpIazSDL7TzTu7xGDJIZQj2CFmtXYRWbkbV3z cWE8Ka3wUJ/y7T7smO4rf0AXSEI+xRKvZyKxKloyvfE57Q9vNhOHnxHvVN1/ln1TClC0 kW5Y+urGDGmCxbA/2IKFAtawSKJs4Wu7cOdLLsgT6vAM93CFnkGAx1APzxu9UwKMsmBa 80H8J1CpeV5rCvrI1ELtlhZ2koZH0F85NKa03CQx7b7miTHGyUg7J9K/t8mrraQhfQr6 U5EbinrSfr7KZGkkLgemWsQV0lpLNzxRlKUGWzMq8WZ7YiBscj57/9N8kEWpwql/Xt7x CskA== X-Gm-Message-State: AOJu0Yw4+vFCftluAr1xHqouh8PgC/C9vHdaqv2F04se/GMbWvvIGnD1 snd4CSBdW6V7vmC8aYaA9pvxIhQ7H2ermgu5oxsg6veLRjjjUIu8T/fL6OmZu0VDNvtnWK0GELc l X-Google-Smtp-Source: AGHT+IG+moa5CelR4wcWKiPrSXr92jlFBykqrBUANqj/NP10lZca8tLDfw7h0yzZPG8/tpjwCGMWHQ== X-Received: by 2002:a17:907:1b10:b0:a7d:3ab9:6a5d with SMTP id a640c23a62f3a-a7dc5130c90mr891231866b.69.1722948843425; Tue, 06 Aug 2024 05:54:03 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Peter Maydell , Markus Armbruster , Kevin Wolf , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PULL 20/28] hw/block/fdc-isa: Assert that isa_fdc_get_drive_max_chs() found something Date: Tue, 6 Aug 2024 14:51:48 +0200 Message-ID: <20240806125157.91185-21-philmd@linaro.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240806125157.91185-1-philmd@linaro.org> References: <20240806125157.91185-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::62b; envelope-from=philmd@linaro.org; helo=mail-ej1-x62b.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1722949395974116600 From: Peter Maydell Coverity complains about an overflow in isa_fdc_get_drive_max_chs() that can happen if the loop over fd_formats never finds a match, because we initialize *maxc to 0 and then at the end of the function decrement it. This can't ever actually happen because fd_formats has at least one entry for each FloppyDriveType, so we must at least once find a match and update *maxc, *maxh and *maxs. Assert that we did find a match, which should keep Coverity happy and will also detect possible bugs in the data in fd_formats. Resolves: Coverity CID 1547663 Signed-off-by: Peter Maydell Reviewed-by: Markus Armbruster Reviewed-by: Kevin Wolf Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-ID: <20240731143617.3391947-6-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- hw/block/fdc-isa.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/block/fdc-isa.c b/hw/block/fdc-isa.c index e43dc532af..796835f57b 100644 --- a/hw/block/fdc-isa.c +++ b/hw/block/fdc-isa.c @@ -147,6 +147,8 @@ static void isa_fdc_get_drive_max_chs(FloppyDriveType t= ype, uint8_t *maxc, *maxs =3D fdf->last_sect; } } + /* fd_formats must contain at least one entry per FloppyDriveType */ + assert(*maxc); (*maxc)--; } =20 --=20 2.45.2