bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae building syzkaller on 04201c0669446145fd9c347c5538da0ca13ff29b testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: be8fc94041bf70e410e6b540e44d282ac37cb3fb28af9a41a38dd171e72db597 run #0: crashed: WARNING: ODEBUG bug in slave_kobj_release run #1: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #2: crashed: WARNING: ODEBUG bug in slave_kobj_release run #3: crashed: WARNING: ODEBUG bug in slave_kobj_release run #4: crashed: WARNING in process_one_work run #5: crashed: WARNING: ODEBUG bug in slave_kobj_release run #6: crashed: WARNING: ODEBUG bug in slave_kobj_release run #7: crashed: WARNING: ODEBUG bug in slave_kobj_release run #8: crashed: WARNING: ODEBUG bug in slave_kobj_release run #9: crashed: WARNING: ODEBUG bug in slave_kobj_release run #10: crashed: WARNING: ODEBUG bug in slave_kobj_release run #11: crashed: WARNING: ODEBUG bug in slave_kobj_release run #12: crashed: WARNING: ODEBUG bug in slave_kobj_release run #13: crashed: WARNING: ODEBUG bug in slave_kobj_release run #14: crashed: WARNING: ODEBUG bug in slave_kobj_release run #15: crashed: WARNING: ODEBUG bug in slave_kobj_release run #16: crashed: WARNING: ODEBUG bug in slave_kobj_release run #17: crashed: WARNING: ODEBUG bug in slave_kobj_release run #18: crashed: WARNING: ODEBUG bug in slave_kobj_release run #19: OK testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 748c546b02f49fd797706146591c98e174b89676fdd4c1eff5cfbac8c633e7ee all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m20.124982454s (build: 17m14.6850987s, test: 14m38.208620985s) the crash still happens on HEAD commit msg: Linux 4.14.246 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout