fix driver rebinding

internal/client/share.go

@@ -276,17 +276,28 @@ func (sm *ShareManager) handleReleaseDevice(busID, fromClient string) {
 		return
 	}
 
-	// Clean up tunnel
+	// Close the tunnel pipe to signal HandleConnection to stop reading
+	var tunnelDone <-chan struct{}
 	if tunnel, ok := sm.tunnels[share.tunnelID]; ok {
 		tunnel.inPipe.Close()
+		tunnelDone = tunnel.done
 		delete(sm.tunnels, share.tunnelID)
 	}
 
-	// Detach device (release interfaces, reconnect kernel driver)
-	share.server.Detach()
+	server := share.server
 	delete(sm.active, busID)
 	sm.mu.Unlock()
 
+	// Wait for HandleConnection goroutine to finish before detaching.
+	// This ensures no more URBs are being submitted when we detach.
+	if tunnelDone != nil {
+		<-tunnelDone
+		log.Printf("[share] HandleConnection goroutine finished for %s", busID)
+	}
+
+	// Now safe to detach - no more USB/IP protocol processing
+	server.Detach()
+
 	// Notify client
 	sm.client.SendJSON(&protocol.DeviceReleased{
 		Type:  protocol.MsgDeviceReleased,