From patchwork Fri Sep 3 17:39:38 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: 12474817 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 520EEC433F5 for ; Fri, 3 Sep 2021 17:43:12 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B466060238 for ; Fri, 3 Sep 2021 17:43:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B466060238 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:44118 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mMDDa-0004Ne-Ok for qemu-devel@archiver.kernel.org; Fri, 03 Sep 2021 13:43:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50122) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMDAq-0002L5-02 for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:40:20 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:41916) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mMDAk-0004qX-9r for qemu-devel@nongnu.org; Fri, 03 Sep 2021 13:40:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630690813; 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; bh=4NNCT/6mJQHBezCMyj/1zWFUy+TBscSgBk0G568aq7s=; b=HgZvnJQQ1lsXH2+uNa6Mkxx47t/xSlJwgvZJRNgipXRpdOmiRMM5HUEhFU7VRJm9lV8ZH3 YnDqaxWrFnd18lEP4pHDLhAUpO6oEoEgQEkNDYwfJn2y1QISXnpndXZAJi2Tomvq/3xz+R vIhaMjqjydxqpUi1NKNese/ptqWBG1s= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-223-dZacTQASP3qq9TWyUTW6hQ-1; Fri, 03 Sep 2021 13:40:12 -0400 X-MC-Unique: dZacTQASP3qq9TWyUTW6hQ-1 Received: by mail-wm1-f71.google.com with SMTP id v2-20020a7bcb420000b02902e6b108fcf1so34428wmj.8 for ; Fri, 03 Sep 2021 10:40:11 -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:mime-version :content-transfer-encoding; bh=/YkcMeWujQMsGibHR8EV4yAq+i22iiMCz7mye6vm8XE=; b=gwso93DuTZ5qZ3JaEezq7Ap3Ws2qp+4Un7V5Wa7Z1HEPYVz9x6hngF5zFCU0GdhprJ ufWag5g9au3k9nXFkAzCAjHovM53i19uJWw60e86iECoqdfuH1aHz7aYpukhbYNZbVEv xDLCcDBOJo46EiTp20NYiXHoSe28TiC6NxJgdnF0bXVmNogs20gEifkZhPZ48r9xLERv REiNQHOGcOuE1HT0B/LDeffd84DryaIaxfYo9X6Nrwv4SvKexbpFha7XbeA8OthvEWJh 50xnzToGFdgnRs8IOucIVktkfXWH7v6WeIeOP8Jaxtio2qV4ENLjR7bbbHUYOvzlfUo2 D2aA== X-Gm-Message-State: AOAM5338rGtLuzxTlorBvW1zIQHvV1UVrTsnGN9eEwNo+9qBqRTk4TIe eNqRQezR2qPRWdpkKAsIB+8oaISrNSsdjT9K9MbEsBiMcLcHdNYYfpKlCWW51U5sazZCG9SkKtL cmt+cNCLnXHV4e8ZmjzYDiAEzWLL/VmKahCVAe6SOn4ZssmtGikw0Q3P86zLC1PJu X-Received: by 2002:a7b:c0c7:: with SMTP id s7mr32511wmh.66.1630690810563; Fri, 03 Sep 2021 10:40:10 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzk/z85zICKnCl4IuOzrie/j4oiJW6/xfWkYRhb5aQOJ6snWo1AeU5yQ1K5iZuDPbFkIY13sw== X-Received: by 2002:a7b:c0c7:: with SMTP id s7mr32465wmh.66.1630690810240; Fri, 03 Sep 2021 10:40:10 -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 u5sm5225206wrr.94.2021.09.03.10.40.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Sep 2021 10:40:09 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 00/30] glib: Replace g_memdup() by g_memdup2() Date: Fri, 3 Sep 2021 19:39:38 +0200 Message-Id: <20210903174008.749126-1-philmd@redhat.com> X-Mailer: git-send-email 2.31.1 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=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: 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Per https://discourse.gnome.org/t/port-your-module-from-g-memdup-to-g-memdup2-now/5538 The old API took the size of the memory to duplicate as a guint, whereas most memory functions take memory sizes as a gsize. This made it easy to accidentally pass a gsize to g_memdup(). For large values, that would lead to a silent truncation of the size from 64 to 32 bits, and result in a heap area being returned which is significantly smaller than what the caller expects. This can likely be exploited in various modules to cause a heap buffer overflow. g_memdup() as been deprecated in GLib 2.68. Since QEMU defines GLIB_VERSION_MAX_ALLOWED to GLIB_VERSION_2_56, the deprecation is not displayed (on GLib >= 2.68 such available on Fedora 34). However the function is still unsafe, so it is better to avoid its use. This series provides the safely equivalent g_memdup2() wrapper, and replace all g_memdup() calls by it. The previous link recommend to audit the call sites. Most of the calls use byte_size=sizeof(STRUCT), and no STRUCT appears to be > 4GiB. Few calls use unsigned/size_t/uint16_t. Where code is doing multiplication, patches are sent as RFC. In particular: hw/net/virtio-net.c hw/virtio/virtio-crypto.c Since v1: - Added missing g_memdup2 -> g_memdup2_qemu compat definition (danpb) - Do not call g_memdup2_qemu() but directly g_memdup2() (danpb) Philippe Mathieu-Daudé (30): hw/hyperv/vmbus: Remove unused vmbus_load/save_req() glib-compat: Introduce g_memdup2() wrapper qapi: Replace g_memdup() by g_memdup2() accel/tcg: Replace g_memdup() by g_memdup2() block/qcow2-bitmap: Replace g_memdup() by g_memdup2() softmmu: Replace g_memdup() by g_memdup2() hw/9pfs: Replace g_memdup() by g_memdup2() hw/acpi: Avoid truncating acpi_data_len() to 32-bit hw/acpi: Replace g_memdup() by g_memdup2() hw/core/machine: Replace g_memdup() by g_memdup2() hw/hppa/machine: Replace g_memdup() by g_memdup2() hw/i386/multiboot: Replace g_memdup() by g_memdup2() hw/net/eepro100: Replace g_memdup() by g_memdup2() hw/nvram/fw_cfg: Replace g_memdup() by g_memdup2() hw/scsi/mptsas: Replace g_memdup() by g_memdup2() hw/ppc/spapr_pci: Replace g_memdup() by g_memdup2() hw/rdma: Replace g_memdup() by g_memdup2() hw/vfio/pci: Replace g_memdup() by g_memdup2() RFC hw/virtio: Replace g_memdup() by g_memdup2() net/colo: Replace g_memdup() by g_memdup2() RFC ui/clipboard: Replace g_memdup() by g_memdup2() RFC linux-user: Replace g_memdup() by g_memdup2() tests/unit: Replace g_memdup() by g_memdup2() tests/qtest: Replace g_memdup() by g_memdup2() target/arm: Replace g_memdup() by g_memdup2() target/ppc: Replace g_memdup() by g_memdup2() contrib: Replace g_memdup() by g_memdup2() checkpatch: Do not allow deprecated g_memdup() f test include/glib-compat.h | 41 ++++++++++++++++++++++++-- include/hw/hyperv/vmbus.h | 3 -- accel/tcg/cputlb.c | 8 ++--- block/qcow2-bitmap.c | 2 +- contrib/plugins/lockstep.c | 2 +- contrib/rdmacm-mux/main.c | 10 +++---- hw/9pfs/9p-synth.c | 2 +- hw/9pfs/9p.c | 2 +- hw/acpi/core.c | 3 +- hw/arm/virt-acpi-build.c | 2 +- hw/core/machine.c | 4 +-- hw/hppa/machine.c | 8 ++--- hw/hyperv/vmbus.c | 59 ------------------------------------- hw/i386/acpi-build.c | 6 ++-- hw/i386/multiboot.c | 2 +- hw/net/eepro100.c | 2 +- hw/net/virtio-net.c | 3 +- hw/nvram/fw_cfg.c | 9 +++--- hw/ppc/spapr_pci.c | 7 ++--- hw/rdma/rdma_utils.c | 2 +- hw/scsi/mptsas.c | 5 ++-- hw/vfio/pci.c | 2 +- hw/virtio/virtio-crypto.c | 6 ++-- linux-user/syscall.c | 2 +- linux-user/uaccess.c | 2 +- net/colo.c | 4 +-- qapi/qapi-clone-visitor.c | 16 +++++----- qapi/qapi-visit-core.c | 6 ++-- softmmu/memory.c | 2 +- softmmu/vl.c | 2 +- target/arm/helper.c | 6 ++-- target/ppc/mmu-hash64.c | 2 +- tests/qtest/libqos/ahci.c | 6 ++-- tests/qtest/libqos/qgraph.c | 2 +- tests/unit/ptimer-test.c | 22 +++++++------- tests/unit/test-iov.c | 26 ++++++++-------- ui/clipboard.c | 2 +- scripts/checkpatch.pl | 5 ++++ 38 files changed, 140 insertions(+), 155 deletions(-)