From patchwork Fri Sep 3 17:39:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 1524477 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=gU7okA8Y; dkim-atps=neutral Authentication-Results: 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=) 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 ozlabs.org (Postfix) with ESMTPS id 4H1QFn0TgDz9sR4 for ; Sat, 4 Sep 2021 03:46:21 +1000 (AEST) Received: from localhost ([::1]:47568 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mMDGc-0006i9-Qx for incoming@patchwork.ozlabs.org; Fri, 03 Sep 2021 13:46:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50236) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMDAx-0002PR-T6 for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:40:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:37107) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMDAv-00050G-Af for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:40:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630690824; 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=XaUg9euKBEDlRFT/nnz+Q21gALG1vnBlLHaDL6QJTcQ=; b=gU7okA8Y39aV/xjxMDFn9ONI4qd1tNINX9fbOV6zucvB8mkBBYIPQLlm2UWXo3RasPlwdo FjkL6GbJR6b8TQEJetB49HJIlTSr1Wlig3Cxym/plPp4PeqnaUbZtj+xwzY0QX5MAAXnJT BC+Gys3ksVeOIdJr5NYRtzzNyBw01RU= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-125-pj-UCA2rMXm588ADd0K8Iw-1; Fri, 03 Sep 2021 13:40:22 -0400 X-MC-Unique: pj-UCA2rMXm588ADd0K8Iw-1 Received: by mail-wr1-f71.google.com with SMTP id p18-20020a5d4e12000000b0015940dc586aso1819008wrt.6 for ; Fri, 03 Sep 2021 10:40:22 -0700 (PDT) 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=XaUg9euKBEDlRFT/nnz+Q21gALG1vnBlLHaDL6QJTcQ=; b=U+8AUnFLtUKg/nHwIppUquGxMJ0aDAQAgVMSMhL1MMQtn2CUyWRDqvFBl5mVgJeJgx Co6cLRQ7RPWtnDnAMLxL7j5i9686uOwgEaIDJqxtjs0+X4QZm9XNtSonE3mHxhjnYRLh 8HTF+u9ahqf2fg9HBaIMWX/2zAyb5QB5rV5PGaphxna+Th+y2Z3wlNU7g/fGhE7n88XT /E5j01grKxuXT7HivKiR1k6UOo7fLYtheEdbqAoR5kPxj4emxwjMLXLQAlVvM4MlIAiI ZExR3DWEtBiJg6JoAsp8dAlm6K+R2VLuna8D3T4/Punph0VsoqTxSwn57GVI96gYMlwl vdHA== X-Gm-Message-State: AOAM530tOaDbp3WM3unFAEE0MmQdaU5fvD26/aIDtnmZypu2TnFCy2vV Dn9TCtnyZ5RNHHGDgcEdUj4VdIYisxEM3qNHeMjLOOYR69qshelWFrLT8NP13nL/1zQG/yuPO2S fTrzXSanXapB+hH80cvWzas7b+7JvfJ3fif8Q/8SbXWXgkMMhTwEZr7d5c6m2qJor X-Received: by 2002:a1c:7304:: with SMTP id d4mr1556634wmb.119.1630690820958; Fri, 03 Sep 2021 10:40:20 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyuh2b/yTn9LcI7SJtmThfV8lu4ZzK4z5+srzcBTRe7ChXflDQOKGqEncXDl1Qg9xBnYc65Aw== X-Received: by 2002:a1c:7304:: with SMTP id d4mr1556600wmb.119.1630690820684; Fri, 03 Sep 2021 10:40:20 -0700 (PDT) Received: from x1w.. (21.red-83-52-55.dynamicip.rima-tde.net. [83.52.55.21]) by smtp.gmail.com with ESMTPSA id s12sm5394375wru.41.2021.09.03.10.40.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Sep 2021 10:40:20 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 02/30] glib-compat: Introduce g_memdup2() wrapper Date: Fri, 3 Sep 2021 19:39:40 +0200 Message-Id: <20210903174008.749126-3-philmd@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210903174008.749126-1-philmd@redhat.com> References: <20210903174008.749126-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.392, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Fam Zheng , Peter Maydell , "Michael S. Tsirkin" , Jason Wang , Christian Schoenebeck , Gerd Hoffmann , Eric Blake , qemu-block@nongnu.org, John Snow , David Hildenbrand , Markus Armbruster , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Laurent Vivier , Thomas Huth , Eduardo Habkost , Richard Henderson , Alex Williamson , qemu-arm@nongnu.org, =?utf-8?q?Alex_Benn=C3=A9e?= , David Gibson , Kevin Wolf , Vladimir Sementsov-Ogievskiy , "Daniel P . Berrange" , Hanna Reitz , qemu-ppc@nongnu.org, Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" When experimenting raising GLIB_VERSION_MIN_REQUIRED to 2.68 (Fedora 34 provides GLib 2.68.1) we get: hw/virtio/virtio-crypto.c:245:24: error: 'g_memdup' is deprecated: Use 'g_memdup2' instead [-Werror,-Wdeprecated-declarations] ... g_memdup() has been updated by g_memdup2() to fix eventual security issues (size argument is 32-bit and could be truncated / wrapping). GLib recommends to copy their static inline version of g_memdup2(): https://discourse.gnome.org/t/port-your-module-from-g-memdup-to-g-memdup2-now/5538 Our glib-compat.h provides a comment explaining how to deal with these deprecated declarations (see commit e71e8cc0355 "glib: enforce the minimum required version and warn about old APIs"). Following this comment suggestion, implement the g_memdup2_qemu() wrapper to g_memdup2(), and use the safer equivalent inlined when we are using pre-2.68 GLib. Reported-by: Eric Blake Signed-off-by: Philippe Mathieu-Daudé --- include/glib-compat.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/include/glib-compat.h b/include/glib-compat.h index 9e95c888f54..915d0156da0 100644 --- a/include/glib-compat.h +++ b/include/glib-compat.h @@ -68,6 +68,43 @@ * without generating warnings. */ +/* + * g_memdup2_qemu: + * @mem: (nullable): the memory to copy. + * @byte_size: the number of bytes to copy. + * + * Allocates @byte_size bytes of memory, and copies @byte_size bytes into it + * from @mem. If @mem is %NULL it returns %NULL. + * + * This replaces g_memdup(), which was prone to integer overflows when + * converting the argument from a #gsize to a #guint. + * + * This static inline version is a backport of the new public API from + * GLib 2.68, kept internal to GLib for backport to older stable releases. + * See https://gitlab.gnome.org/GNOME/glib/-/issues/2319. + * + * Returns: (nullable): a pointer to the newly-allocated copy of the memory, + * or %NULL if @mem is %NULL. + */ +static inline gpointer g_memdup2_qemu(gconstpointer mem, gsize byte_size) +{ +#if GLIB_CHECK_VERSION(2, 68, 0) + return g_memdup2(mem, byte_size); +#else + gpointer new_mem; + + if (mem && byte_size != 0) { + new_mem = g_malloc(byte_size); + memcpy(new_mem, mem, byte_size); + } else { + new_mem = NULL; + } + + return new_mem; +#endif +} +#define g_memdup2(a) g_memdup2_qemu(a) + #if defined(G_OS_UNIX) /* * Note: The fallback implementation is not MT-safe, and it returns a copy of