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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; 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: 12 X-Spam_score: 1.2 X-Spam_bar: + X-Spam_report: (1.2 / 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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: 1788525092880158500 From: Marc-Andr=C3=A9 Lureau Eliminates the undefined behavior where virtio-gpu's memcpy() overwrites the buffer that an in-flight gvariant still references. Fixes the data race where the GDBus worker thread calls cursor_unref() concurrently with main thread. Fixes: 142ca628a733 ("ui: add a D-Bus display backend") Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Akihiko Odaki --- ui/dbus-listener.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c index 2e2f6ba4183a..a916479044ea 100644 --- a/ui/dbus-listener.c +++ b/ui/dbus-listener.c @@ -899,13 +899,11 @@ static void dbus_cursor_define(DisplayChangeListener = *dcl, =20 ddl_discard_cursor_messages(ddl); =20 - v_data =3D g_variant_new_from_data( - G_VARIANT_TYPE("ay"), + v_data =3D g_variant_new_fixed_array( + G_VARIANT_TYPE_BYTE, c->data, c->width * c->height * 4, - TRUE, - (GDestroyNotify)cursor_unref, - cursor_ref(c)); + 1); =20 qemu_dbus_display1_listener_call_cursor_define( ddl->proxy, --=20 2.55.0.543.g5ebe2ebe4ea8