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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20201008171558.410886-2-jean-philippe@linaro.org> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eric.auger@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 20:29:24 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=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-1.019, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, bbhushan2@marvell.com, qemu-devel@nongnu.org, peterx@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi Jean, On 10/8/20 7:15 PM, Jean-Philippe Brucker wrote: > Due to an invalid mask, virtio_iommu_mr() may return the wrong memory > region. It hasn't been too problematic so far because the function was > only used to test existence of an endpoint, but that is about to change. > > Fixes: cfb42188b24d ("virtio-iommu: Implement attach/detach command") > Signed-off-by: Jean-Philippe Brucker Maybe add CC: QEMU Stable Acked-by: Eric Auger Thanks Eric > --- > hw/virtio/virtio-iommu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c > index a91fa2f674c..543fbbb24fb 100644 > --- a/hw/virtio/virtio-iommu.c > +++ b/hw/virtio/virtio-iommu.c > @@ -101,7 +101,7 @@ static IOMMUMemoryRegion *virtio_iommu_mr(VirtIOIOMMU *s, uint32_t sid) > bus_n = PCI_BUS_NUM(sid); > iommu_pci_bus = iommu_find_iommu_pcibus(s, bus_n); > if (iommu_pci_bus) { > - devfn = sid & PCI_DEVFN_MAX; > + devfn = sid & (PCI_DEVFN_MAX - 1); > dev = iommu_pci_bus->pbdev[devfn]; > if (dev) { > return &dev->iommu_mr; >