bisecting fixing commit since 87335852c5d9ec629f80bb2257b9a9945962b719 building syzkaller on a0092f9dfdd33924abe5cf5565e4ec4748217c7b testing commit 87335852c5d9ec629f80bb2257b9a9945962b719 with gcc (GCC) 8.4.1 20210217 kernel signature: 5e383d791d551c84891a8ca3d8638da8ba5726f32fe726282cb0eb2e62b69e29 run #0: crashed: WARNING in pm_qos_remove_request run #1: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #2: crashed: WARNING in pm_qos_remove_request run #3: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #4: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #5: crashed: WARNING in pm_qos_remove_request run #6: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #7: crashed: WARNING in pm_qos_remove_request run #8: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #9: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #10: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #11: crashed: WARNING in pm_qos_remove_request run #12: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #13: crashed: WARNING in pm_qos_remove_request run #14: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #15: crashed: WARNING in pm_qos_remove_request run #16: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #17: crashed: WARNING in pm_qos_remove_request run #18: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #19: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync testing current HEAD ad8397a84e1e425e3f8221638cee2bfa237d9b2c testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c with gcc (GCC) 8.4.1 20210217 kernel signature: 2329123d08fefe695592c9d93f7ab8ff62f294cf61653e8a1d2c03f8c77eb531 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m27.157980692s (build: 17m10.401219493s, test: 7m45.443790717s) the crash still happens on HEAD commit msg: Linux 4.14.234 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout