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Wed, 24 Jun 2020 08:37:44 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id C6E741138483; Wed, 24 Jun 2020 10:37:37 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH v2 21/25] amd_iommu: Fix amdvi_realize() error API violation Date: Wed, 24 Jun 2020 10:37:33 +0200 Message-Id: <20200624083737.3086768-22-armbru@redhat.com> In-Reply-To: <20200624083737.3086768-1-armbru@redhat.com> References: <20200624083737.3086768-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=205.139.110.120; envelope-from=armbru@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/24 03:27:53 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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. amdvi_realize() is wrong that way: it passes @errp to qdev_realize(), object_property_get_int(), and msi_init() without checking it. I can't tell offhand whether qdev_realize() can fail here. Fix by checking it for failure. object_property_get_int() can't. Fix by passing &error_abort instead. Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Signed-off-by: Markus Armbruster --- hw/i386/amd_iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index b26d30da57..087f601666 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -1549,7 +1549,9 @@ static void amdvi_realize(DeviceState *dev, Error **errp) /* This device should take care of IOMMU PCI properties */ x86_iommu->type = TYPE_AMD; - qdev_realize(DEVICE(&s->pci), &bus->qbus, errp); + if (!qdev_realize(DEVICE(&s->pci), &bus->qbus, errp)) { + return; + } ret = pci_add_capability(&s->pci.dev, AMDVI_CAPAB_ID_SEC, 0, AMDVI_CAPAB_SIZE, errp); if (ret < 0) { @@ -1578,7 +1580,7 @@ static void amdvi_realize(DeviceState *dev, Error **errp) sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->mmio); sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, AMDVI_BASE_ADDR); pci_setup_iommu(bus, amdvi_host_dma_iommu, s); - s->devid = object_property_get_int(OBJECT(&s->pci), "addr", errp); + s->devid = object_property_get_int(OBJECT(&s->pci), "addr", &error_abort); msi_init(&s->pci.dev, 0, 1, true, false, errp); amdvi_init(s); } -- 2.26.2