bisecting fixing commit since 87335852c5d9ec629f80bb2257b9a9945962b719 building syzkaller on a0092f9dfdd33924abe5cf5565e4ec4748217c7b testing commit 87335852c5d9ec629f80bb2257b9a9945962b719 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: c74fafae5d6f8945d5c3b6e7b1d871d283777df1e2729e90b3276761476c6a9a run #0: crashed: WARNING in pm_qos_remove_request run #1: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync 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: WARNING in pm_qos_remove_request 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: WARNING in pm_qos_remove_request run #8: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #9: crashed: WARNING in pm_qos_remove_request run #10: crashed: WARNING in pm_qos_remove_request run #11: crashed: WARNING in pm_qos_remove_request 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: BUG: unable to handle kernel paging request in pm_qos_update_target run #16: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target run #17: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #18: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync run #19: crashed: WARNING in pm_qos_remove_request testing current HEAD 8ee0807eedf3bc60c8a47a7dd95387102bcfd063 testing commit 8ee0807eedf3bc60c8a47a7dd95387102bcfd063 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9da85c9dc78f2426cd7f75a705213385eda8ebe20597f6b7e005404a5922288e all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m38.079114946s (build: 15m11.48563275s, test: 7m55.371381079s) the crash still happens on HEAD commit msg: Linux 4.14.259 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 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: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout