bisecting fixing commit since 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 building syzkaller on 4c37c133e4bf703d023995535f1e264d8658e08e testing commit 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1bf677683ffded16e9a5c26560a3cccf4a9ac9fff700d52a5e7c61d187474b51 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: crashed: WARNING in tracepoint_probe_register_prio run #18: crashed: WARNING in tracepoint_probe_register_prio run #19: OK testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740 testing commit 162b95d01320370b80cb2d5724cea4ae538ac740 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3a29c79606b5abe91af62b2b1c64f28e9e27bf8cf6c73f27ae7e7fef935433f3 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 36m18.654299289s (build: 21m55.023047823s, test: 13m53.906107618s) the crash still happens on HEAD commit msg: Linux 4.14.244 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout