Messages in this thread | | | Subject | Re: [PATCH v2 05/12] usb: otg-fsm: Fix hrtimer list corruption | From | Dmitry Osipenko <> | Date | Sat, 3 Jul 2021 20:22:38 +0300 |
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03.07.2021 14:08, Peter Chen пишет: > On 21-07-02 02:43:10, Dmitry Osipenko wrote: >> The HNP work can be re-scheduled while it's still in-fly. This results in >> re-initialization of the busy work, resetting the hrtimer's list node of >> the work and crashing kernel with null dereference within kernel/timer >> once work's timer is expired. It's very easy to trigger this problem by >> re-plugging USB cable quickly. Initialize HNP work only once to fix this >> trouble. > > Fully OTG compliance support has not maintained for years, what's the use case you > still want to use?
I don't have any use case for it, but I had CONFIG_USB_OTG_FSM=y and it was crashing kernel badly. The OTG works perfectly fine without the FSM.
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