bisecting fixing commit since 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 building syzkaller on 4c37c133e4bf703d023995535f1e264d8658e08e testing commit 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 with gcc (GCC) 8.4.1 20210217 kernel signature: 26d2caf53841f7b42bcefa314dc36e97d25da56116100cee51d4ff5e49bfb802 run #0: crashed: WARNING in tracepoint_probe_register_prio run #1: crashed: WARNING in tracepoint_probe_register_prio run #2: crashed: WARNING in tracepoint_probe_register_prio run #3: crashed: WARNING in tracepoint_probe_register_prio run #4: crashed: WARNING in tracepoint_probe_register_prio run #5: crashed: WARNING in tracepoint_probe_register_prio run #6: crashed: WARNING in tracepoint_probe_register_prio run #7: crashed: WARNING in tracepoint_probe_register_prio run #8: crashed: WARNING in tracepoint_probe_register_prio run #9: crashed: WARNING in tracepoint_probe_register_prio run #10: crashed: WARNING in tracepoint_probe_register_prio run #11: crashed: WARNING in tracepoint_probe_register_prio run #12: crashed: WARNING in tracepoint_probe_register_prio run #13: crashed: WARNING in tracepoint_probe_register_prio run #14: crashed: WARNING in tracepoint_probe_register_prio run #15: crashed: WARNING in tracepoint_probe_register_prio run #16: crashed: WARNING in tracepoint_probe_register_prio run #17: OK run #18: OK run #19: OK testing current HEAD 4e68c9b0763ff55eaa69d6e519f07515f1c9037b testing commit 4e68c9b0763ff55eaa69d6e519f07515f1c9037b with gcc (GCC) 8.4.1 20210217 kernel signature: 7e5ed789301ec8c9927fd9f83cab2bc173f362744e1d68fde0d1b1e56712748c all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 37m57.628724252s (build: 22m40.000815201s, test: 14m57.583063078s) the crash still happens on HEAD commit msg: Linux 4.14.239 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout