On Tue, 2020-11-10 at 16:49 +0800, Claire Chang wrote: > If a device is getting removed or reprobed during resume, use-after-free > might happen. For example, h5_btrtl_resume()[drivers/bluetooth/hci_h5.c] > schedules a work queue for device reprobing. During the reprobing, if > rfkill_set_block() in rfkill_resume() is called after the corresponding > *_unregister() and kfree() are called, there will be an use-after-free > in hci_rfkill_set_block()[net/bluetooth/hci_core.c]. Not sure I understand. So you're saying * something (h5_btrtl_resume) schedules a worker * said worker run, when it runs, calls rfkill_unregister() * somehow rfkill_resume() still gets called after this But that can't really be right, device_del() removes it from the PM lists? johannes
