bisecting fixing commit since 1752938529c614a8ed4432ecce6ebc95d3b87207 building syzkaller on 79264ae39c1ef4b4875ab67d6f0c8c3e75aa6a34 testing commit 1752938529c614a8ed4432ecce6ebc95d3b87207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5e2419c7b60dd320033b7eddc7d996e24336454c2bf761557bf3214fc08c3042 run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in corrupted run #2: crashed: WARNING in corrupted run #3: crashed: WARNING in process_one_work run #4: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #5: crashed: WARNING in process_one_work run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #8: crashed: WARNING in corrupted run #9: crashed: WARNING in corrupted run #10: crashed: WARNING in corrupted run #11: crashed: WARNING in process_one_work run #12: crashed: WARNING in process_one_work run #13: crashed: WARNING in process_one_work run #14: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD e3a56aaade89bc89f33baec11b12538fc22536e2 testing commit e3a56aaade89bc89f33baec11b12538fc22536e2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: d9bc754bf751b8cf7f0cc615fd62b2541909328c11934abc34bdbc3425243398 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 30m6.831546559s (build: 14m45.303958781s, test: 14m55.98889118s) the crash still happens on HEAD commit msg: Linux 4.14.277 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 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: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout