From patchwork Thu Mar 28 10:20:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 13608358 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 AEEA6C54E64 for ; Thu, 28 Mar 2024 10:22:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rpmsm-00018i-0F; Thu, 28 Mar 2024 06:21:16 -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 1rpmsj-000187-B3 for qemu-devel@nongnu.org; Thu, 28 Mar 2024 06:21:15 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rpmsg-0007Z4-5r for qemu-devel@nongnu.org; Thu, 28 Mar 2024 06:21:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711621268; 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=LvCRvdp44puTLh0kZztOo+1iwfbYNFDwxzECnXzb+Fg=; b=ZolkExJPkBNJyP1Js7rvj8+GI4UbV9ANlMB64A3L9q25IZdbCTK4UO5cfNWdRRX3CTmgOX fIBDIxf8HO7hTNivNSgtxopJtUCH5V36bYMMZbHPujOXux5LLb4a4TD2gEW37VrP0AM4Dz vIVztGGOu2Tfh9WOM9wqF0ESpVHFXu4= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-422-cNUmJwQYPKKNbsGazjyJng-1; Thu, 28 Mar 2024 06:21:04 -0400 X-MC-Unique: cNUmJwQYPKKNbsGazjyJng-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A0821811E81; Thu, 28 Mar 2024 10:21:01 +0000 (UTC) Received: from localhost (unknown [10.39.208.34]) by smtp.corp.redhat.com (Postfix) with ESMTP id 177111C060D0; Thu, 28 Mar 2024 10:20:58 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: Hyman Huang , Vladimir Sementsov-Ogievskiy , Paolo Bonzini , Gerd Hoffmann , qemu-block@nongnu.org, Kevin Wolf , Fabiano Rosas , Mahmoud Mandour , John Snow , Klaus Jensen , Fam Zheng , =?utf-8?q?Eugenio_P=C3=A9rez?= , Bin Meng , Hanna Reitz , Eric Blake , "Michael S. Tsirkin" , Stefan Hajnoczi , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Yuval Shaia , =?utf-8?q?Alex_Benn=C3=A9e?= , Jesper Devantier , Pierrick Bouvier , Keith Busch , Marcel Apfelbaum , Alexandre Iooss , Peter Xu , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= Subject: [PATCH 00/19] -Werror=maybe-uninitialized fixes Date: Thu, 28 Mar 2024 14:20:33 +0400 Message-ID: <20240328102052.3499331-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.133.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Marc-André Lureau Hi, Depending on -Doptimization=, GCC (13.2.1 here) produces different maybe-uninitialized warnings: - g: produces -Werror=maybe-uninitialized errors - 0: clean build - 1: produces -Werror=maybe-uninitialized errors - 2: clean build - 3: produces few -Werror=maybe-uninitialized errors - s: produces -Werror=maybe-uninitialized errors Most are false-positive, because prior LOCK_GUARD should guarantee an initialization path. Few of them are a bit trickier. Finally, I found a potential related memory leak. thanks Marc-André Lureau (19): util/coroutine: fix -Werror=maybe-uninitialized false-positive util/timer: with -Werror=maybe-uninitialized false-positive hw/qxl: fix -Werror=maybe-uninitialized false-positives nbd: with -Werror=maybe-uninitialized false-positive block/mirror: fix -Werror=maybe-uninitialized false-positive block/stream: fix -Werror=maybe-uninitialized false-positives hw/ahci: fix -Werror=maybe-uninitialized false-positive hw/vhost-scsi: fix -Werror=maybe-uninitialized hw/sdhci: fix -Werror=maybe-uninitialized false-positive hw/rdma: fix -Werror=maybe-uninitialized false-positive migration/block: fix -Werror=maybe-uninitialized false-positive migration: fix -Werror=maybe-uninitialized false-positives hw/virtio-blk: fix -Werror=maybe-uninitialized false-positive plugins: fix -Werror=maybe-uninitialized false-positive migration: fix -Werror=maybe-uninitialized false-positive tests: fix -Werror=maybe-uninitialized hw/nvme: fix -Werror=maybe-uninitialized hw/virtio: fix -Werror=maybe-uninitialized RFC: hw/virtio: a potential leak fix block/mirror.c | 2 +- block/stream.c | 6 +++--- hw/block/virtio-blk.c | 2 +- hw/display/qxl.c | 4 ++-- hw/ide/ahci.c | 3 ++- hw/nvme/ctrl.c | 2 +- hw/rdma/rdma_backend.c | 2 +- hw/scsi/vhost-scsi.c | 2 +- hw/sd/sdhci.c | 2 +- hw/virtio/vhost-shadow-virtqueue.c | 6 ++++-- migration/block.c | 2 +- migration/dirtyrate.c | 4 ++-- migration/migration.c | 2 +- migration/ram.c | 2 +- nbd/client-connection.c | 2 +- plugins/loader.c | 2 +- tests/unit/test-bdrv-drain.c | 2 +- tests/unit/test-block-iothread.c | 2 +- util/qemu-coroutine.c | 2 +- util/qemu-timer.c | 6 +++--- 20 files changed, 30 insertions(+), 27 deletions(-)