i3c: master: cdns: Fix use after free vulnerability in cdns_i3c_master Driver Due to Race Condition

In the Linux kernel, the following vulnerability has been resolved:

i3c: master: cdns: Fix use after free vulnerability in cdns_i3c_master Driver Due to Race Condition

In the cdns_i3c_master_probe function, &master->hj_work is bound with

cdns_i3c_master_hj. And cdns_i3c_master_interrupt can call

cnds_i3c_master_demux_ibis function to start the work.

If we remove the module which will call cdns_i3c_master_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

| cdns_i3c_master_hj

cdns_i3c_master_remove |

i3c_master_unregister(&master->base) |

device_unregister(&master->dev) |

device_release |

//free master->base |

| i3c_master_do_daa(&master->base)

| //use master->base

Fix it by ensuring that the work is canceled before proceeding with

the cleanup in cdns_i3c_master_remove.