Vulnerabilidad en kernel de Linux (CVE-2024-57984)

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i3c: dw: Arregla el use after free en el controlador dw_i3c_master debido a una condición de ejecución En dw_i3c_common_probe, &master->hj_work is bound with dw_i3c_hj_work. And dw_i3c_master_irq_handler can call dw_i3c_master_irq_handle_ibis function to start the work. If we remove the module which will call dw_i3c_common_remove to make cleanup, it will free master->base through i3c_master_unregister while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | dw_i3c_hj_work dw_i3c_common_remove | i3c_master_unregister(&master->base) | device_unregister(&master->dev) | device_release | //free master->base | | i3c_master_do_daa(&master->base) | //use master->base Solucione el problema asegurándose de que el trabajo se cancele antes de continuar con la depuración en dw_i3c_common_remove.