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Tsirkin" , Jason Wang , Stefan Hajnoczi , Stefano Garzarella , Germano Veit Michel , Raphael Norwitz Subject: [PATCH v1 01/15] libvhost-user: Fix msg_region->userspace_addr computation Date: Fri, 2 Feb 2024 22:53:18 +0100 Message-ID: <20240202215332.118728-2-david@redhat.com> In-Reply-To: <20240202215332.118728-1-david@redhat.com> References: <20240202215332.118728-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 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=170.10.133.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.276, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1706910896081100009 Content-Type: text/plain; charset="utf-8" We barely had mmap_offset set in the past. With virtio-mem and dynamic-memslots that will change. In vu_add_mem_reg() and vu_set_mem_table_exec_postcopy(), we are performing pointer arithmetics, which is wrong. Let's simply use dev_region->mmap_addr instead of "void *mmap_addr". Fixes: ec94c8e621de ("Support adding individual regions in libvhost-user") Fixes: 9bb38019942c ("vhost+postcopy: Send address back to qemu") Cc: Raphael Norwitz Signed-off-by: David Hildenbrand Reviewed-by: Raphael Norwitz --- subprojects/libvhost-user/libvhost-user.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvho= st-user/libvhost-user.c index a3b158c671..7e515ed15d 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -800,8 +800,8 @@ vu_add_mem_reg(VuDev *dev, VhostUserMsg *vmsg) { * Return the address to QEMU so that it can translate the ufd * fault addresses back. */ - msg_region->userspace_addr =3D (uintptr_t)(mmap_addr + - dev_region->mmap_offset); + msg_region->userspace_addr =3D dev_region->mmap_addr + + dev_region->mmap_offset; =20 /* Send the message back to qemu with the addresses filled in. */ vmsg->fd_num =3D 0; @@ -969,8 +969,8 @@ vu_set_mem_table_exec_postcopy(VuDev *dev, VhostUserMsg= *vmsg) /* Return the address to QEMU so that it can translate the ufd * fault addresses back. */ - msg_region->userspace_addr =3D (uintptr_t)(mmap_addr + - dev_region->mmap_offset); + msg_region->userspace_addr =3D dev_region->mmap_addr + + dev_region->mmap_offset; close(vmsg->fds[i]); } =20 --=20 2.43.0