From nobody Fri May 17 03:39:38 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=1604413755; cv=none; d=zohomail.com; s=zohoarc; b=adJB5hcm2syYohJF/s1n3H6wYR9R2LQH+jeCpHPSWSn4iXQoMZcH+xkAegdG0jJlZ/qhpYMEitCdwr/ya9WUjL2I817rueynlkMINIooUFeDMElESm+FmUsWjeQ+aH8doc6ZNOcg/UlwUGaDK7L3CLfmkad0DD1MnHpY2lEr8Uk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1604413755; h=Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To; bh=Ehb4eb1aLZYFa7m4upl4i1sttuC1RAgb1Up0JUUrLu0=; b=Pdp3WBY6PjaEB6rdC3omcnSyMvKYMuvqHHn2XcVgfqHYvRcdJziFChVGsikXaEDGunqWXLmOR1+Y4gVyBl+lLmk1tTXb6TTnUR8svNur61dxfb7PPY03yqKcDgc+suFpfuo83C5rQJi25AALon3RTLGEoT5DXLog15bckojl4fk= 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) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1604413755079363.6722564390748; Tue, 3 Nov 2020 06:29:15 -0800 (PST) Received: from localhost ([::1]:55922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kZxJC-0005ZC-0m for importer@patchew.org; Tue, 03 Nov 2020 09:29:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58426) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZxGp-0004Sr-SX for qemu-devel@nongnu.org; Tue, 03 Nov 2020 09:26:47 -0500 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]:38043) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kZxGi-0003jh-Px for qemu-devel@nongnu.org; Tue, 03 Nov 2020 09:26:47 -0500 Received: by mail-wr1-x442.google.com with SMTP id n18so18773038wrs.5 for ; Tue, 03 Nov 2020 06:26:40 -0800 (PST) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id l3sm3470838wmf.0.2020.11.03.06.26.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2020 06:26:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ehb4eb1aLZYFa7m4upl4i1sttuC1RAgb1Up0JUUrLu0=; b=y9Vu1FYBr05CNAThFBfuYIxlfyl2p3H6cX5hIlw1WiurumdGPvCwSz8s04cjhI7Pn9 NFIQUk4yEdN+/R1s9jYeUsj2bDTl2bmdMNdjfY4TxMHh9j3kekq8w8C1EvVdP73IoiID SCuw18k4PiQe1L+8GY0zkKq/zBZcL4kNJN+/aonVrjwlLoZEYbq9BWCDWFn0g4W92BWe cGDYJvk0S1JttmxaHvlZUZuZWpz/WW0HIB/K5pK8SingUmFhH+KzLzzuS4jM275IKFjr GpjRY87wqOha6u0FIsqC9WJwB6ciSenF9qDplVh+cSCZe6LYEoNklx5cRQV4+mH8Vd18 K3sg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ehb4eb1aLZYFa7m4upl4i1sttuC1RAgb1Up0JUUrLu0=; b=Ni1O5FFI+4ATo9yaP70wy1W7RmrgIfh/CK7uwUj9lHpuFGd5CazMx2UO7eowLDoK2R bDatqt8pl3iCZxtQrznRHT6vxnkn4ALOpc1ZKSgHCMXSVcN/SkJ21nW7tBIccv7SKuo6 +ob281c3z7h7fP/PjIzZORTfkvjw12pQH2i5CjkHN789nOwrFstqo+7WLU25r/rIA1qG 3Nz0CSLfvjZ7yAVdNtDjGjlfJiJW9sXh9EcAgwPYm0FF1tRf11qHIG45DxfcnWzpI5o1 Qj/y4S1hCiz+SGHkkVlbD6ywY97clJHqAlFFtVvbZ+BM7HVRP9axz5jDC1qRSAQAj31B rl0Q== X-Gm-Message-State: AOAM530qewrsr0jqV//XaWi9n+CDWDVek6pJGIUfHXh5fSIVWFZ/Jyjl iUhIWhW6EKhix1H5G1z4E/TOnjJ94SV7uw== X-Google-Smtp-Source: ABdhPJxehxhuK3NNpWMJCEKL/rLWAf5VJRhrv2Vsl/7XnAsbTLxiiFbE2E1tzzWK5V7QYpVQAE/ewA== X-Received: by 2002:adf:f643:: with SMTP id x3mr27820750wrp.180.1604413598781; Tue, 03 Nov 2020 06:26:38 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PATCH] linux-user: Use "!= 0" when checking if MAP_FIXED_NOREPLACE is non-zero Date: Tue, 3 Nov 2020 14:26:36 +0000 Message-Id: <20201103142636.21125-1-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 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::442; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x442.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" In pgd_find_hole_fallback(), Coverity doesn't like the use of "if (MAP_FIXED_NOREPLACE || ...)" because it's using a logical operator on a constant other than 0 or 1 and its heuristic thinks we might have intended a bitwise operator instead. The logic is correct (we are checking whether the host really has a MAP_FIXED_NOREPLACE or whether we fell back to the "#define as 0 to ignore" from osdep.h); make Coverity happier by explicitly writing out the comparison with zero. Fixes: Coverity CID 1431059 Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- linux-user/elfload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index e19d0b5cb05..0b02a926025 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -2188,7 +2188,8 @@ static uintptr_t pgd_find_hole_fallback(uintptr_t gue= st_size, uintptr_t brk, PROT_NONE, flags, -1, 0); if (mmap_start !=3D MAP_FAILED) { munmap((void *) align_start, guest_size); - if (MAP_FIXED_NOREPLACE || mmap_start =3D=3D (void *) alig= n_start) { + if (MAP_FIXED_NOREPLACE !=3D 0 || + mmap_start =3D=3D (void *) align_start) { return (uintptr_t) mmap_start + offset; } } --=20 2.20.1