bisecting fixing commit since 87335852c5d9ec629f80bb2257b9a9945962b719 building syzkaller on a0092f9dfdd33924abe5cf5565e4ec4748217c7b testing commit 87335852c5d9ec629f80bb2257b9a9945962b719 with gcc (GCC) 8.4.1 20210217 kernel signature: 97b851526771270ce803881cb10c929e510d1d20a6e07e29e042e30777d787d0 run #0: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync 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: INFO: trying to register non-static key in cancel_delayed_work_sync run #4: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #5: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #6: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #7: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #8: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #9: crashed: WARNING in pm_qos_remove_request run #10: crashed: WARNING in pm_qos_remove_request run #11: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #12: crashed: WARNING in pm_qos_remove_request run #13: crashed: WARNING in pm_qos_remove_request run #14: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #15: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #16: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #17: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target 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 cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217 kernel signature: 9a3acef81dd67c0d3d15965680b615ad5571a34bd084704a55222395c68f80ee all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 22m59.758257328s (build: 15m49.681495219s, test: 6m45.306719264s) the crash still happens on HEAD commit msg: Linux 4.14.237 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout