bisecting fixing commit since f96eb53cbd76415edfba99c2cfa88567a885a428 building syzkaller on 3ce60af85b4644bd7f2d2ef01a7d2b9a41545b76 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 94459ed5047ba83947e92201ec8e3382b9c3ba2e1a5f23cec8fe2b5bb71c946b all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD bfdef05c8da46b022172695aa493cff7ac667a4b testing commit bfdef05c8da46b022172695aa493cff7ac667a4b compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2a6d14190724bb2fe9c3f696a8804a27cc7d1ed103054d99c44ad9d28f4871e0 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m36.301108213s (build: 18m39.883605794s, test: 6m21.41893122s) the crash still happens on HEAD commit msg: Linux 4.14.261 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout