On Wed, Oct 04, 2023 at 04:36:13PM +0200, Javier Carrasco wrote: > syzbot has found a use-after-free bug [1] in the powermate driver. This > happens when the device is disconnected, which leads to a memory free > from the powermate_device struct. > When an asynchronous control message completes after the kfree and its > callback is invoked, the lock does not exist anymore and hence the bug. > > Use usb_kill_urb() on pm->config to cancel any in-progress requests upon > device disconnection. > > [1] https://syzkaller.appspot.com/bug?extid=0434ac83f907a1dbdd1e > > Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> > Reported-by: syzbot+0434ac83f907a1dbdd1e@xxxxxxxxxxxxxxxxxxxxxxxxx Applied, thank you. -- Dmitry
