bisecting fixing commit since ce4d1565392b2dc8ea33032615c934c3dc6a32bb
building syzkaller on 6c236867ce33c0c16b102e02a08226d7eb9b2046
testing commit ce4d1565392b2dc8ea33032615c934c3dc6a32bb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 05e9ac3bc6037abc3f46597c504ffce260705dd0b97008ed376e45b625ee8d03
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
testing commit f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 63ee9d5efe6d11973fed93b61a9006f92afd50b8a42e8e690d16ab6c71a7299c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m31.890389773s (build: 18m38.606348506s, test: 6m27.137545419s)
the crash still happens on HEAD
commit msg: Linux 4.14.248
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout