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Mon, 22 Jun 2020 06:43:06 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-247-Uo6zosgMODeovQNJ5LwRfA-1; Mon, 22 Jun 2020 06:42:58 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C4E4B10059AF; Mon, 22 Jun 2020 10:42:57 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-121.ams2.redhat.com [10.36.112.121]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 933305D9D5; Mon, 22 Jun 2020 10:42:57 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 4C98D1138483; Mon, 22 Jun 2020 12:42:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1592822580; 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=gZGpqjNhU3VLrZIjNN+wDj8VUXVmtMcVJTCwh6ZL+O0=; b=NDC96Zp9Ov1Vfn3AaOa8ZR6d5avKEFXIX2qTFXHEbsmyDsJ2Yt09KfN7PO3vQ1dZgQu2pj /uei/DgWhlOskzq4ZSqcLETPluj0IzpRbUtDsCw5vasYzZlKkxa2g6EiX0VpAZ9oeSJXdc qH4O7FH2Kf2NSbnokLrRAIyzcjUOVNk= X-MC-Unique: Uo6zosgMODeovQNJ5LwRfA-1 From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH 21/22] x86: Fix x86_cpu_new() error API violations Date: Mon, 22 Jun 2020 12:42:49 +0200 Message-Id: <20200622104250.1404835-22-armbru@redhat.com> In-Reply-To: <20200622104250.1404835-1-armbru@redhat.com> References: <20200622104250.1404835-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=207.211.31.120; envelope-from=armbru@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/22 02:57:26 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: Paolo Bonzini , Eduardo Habkost , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. x86_cpu_new() is wrong that way: it passes &local_err to object_property_set_uint() without checking it, and then to qdev_realize(). Harmless, because the former can't actually fail here. Fix by checking for failure right away. While there, replace qdev_realize(); object_unref() by qdev_realize_and_unref(). Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Signed-off-by: Markus Armbruster --- hw/i386/x86.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/hw/i386/x86.c b/hw/i386/x86.c index 34229b45c7..3a7029e6db 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -118,16 +118,10 @@ uint32_t x86_cpu_apic_id_from_index(X86MachineState *= x86ms, =20 void x86_cpu_new(X86MachineState *x86ms, int64_t apic_id, Error **errp) { - Object *cpu =3D NULL; - Error *local_err =3D NULL; + Object *cpu =3D object_new(MACHINE(x86ms)->cpu_type); =20 - cpu =3D object_new(MACHINE(x86ms)->cpu_type); - - object_property_set_uint(cpu, apic_id, "apic-id", &local_err); - qdev_realize(DEVICE(cpu), NULL, &local_err); - - object_unref(cpu); - error_propagate(errp, local_err); + object_property_set_uint(cpu, apic_id, "apic-id", &error_abort); + qdev_realize_and_unref(DEVICE(cpu), NULL, errp); } =20 void x86_cpus_init(X86MachineState *x86ms, int default_cpu_version) --=20 2.26.2