bisecting fixing commit since f96eb53cbd76415edfba99c2cfa88567a885a428
building syzkaller on d236a457274375e5273ac4e958722659929c469f
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 21f30d802b0c32ec1ef4140327eb761f9263ad69242f177b927e5ba0f0621ff3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4f6142473e6acb9d21467638fb84a8268be0f3d05d935a1e0dcfcb6da9551913
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m37.84183457s (build: 16m22.422600299s, test: 6m51.284954687s)
the crash still happens on HEAD
commit msg: Linux 4.14.254
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout