Am Mittwoch, den 12.08.2020, 19:09 +0900 schrieb Tetsuo Handa: > On 2020/08/12 17:02, Oliver Neukum wrote: > > Am Mittwoch, den 12.08.2020, 08:26 +0900 schrieb Tetsuo Handa: > > > syzbot is reporting hung task at wdm_flush() [1], for there is a circular > > > dependency that wdm_flush() from flip_close() for /dev/cdc-wdm0 forever > > > waits for /dev/raw-gadget to be closed while close() for /dev/raw-gadget > > > cannot be called unless close() for /dev/cdc-wdm0 completes. > > > > > > It turned out that wdm_flush() is broken in multiple aspects. > > > > Sorry, > > > > this seems to be a miscommunication. I was under the impression that > > you were testing patches. I will push them upstream. You > > cannot just remove flush() without impairing error handling. > > Then, will you check > > https://lore.kernel.org/linux-usb/254939d4-f3a1-8c7e-94e5-9862c02774fa@xxxxxxxxxxxxxxxxxxx/ > > and > > https://lore.kernel.org/linux-usb/c85331fc-874c-6e46-a77f-0ef1dc075308@xxxxxxxxxxxxxxxxxxx/ > > before pushing upstream? Hi, sure, yes, thank you for the pointers. I shall post an RFC in a few minutes. Regards Oliver
