bisecting fixing commit since 1752938529c614a8ed4432ecce6ebc95d3b87207 building syzkaller on 79264ae39c1ef4b4875ab67d6f0c8c3e75aa6a34 testing commit 1752938529c614a8ed4432ecce6ebc95d3b87207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: af3e103aeb1c0e2d4c443d17a037b4fffef407f87d416fc71f01f5b40b40e77d run #0: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet 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 process_one_work run #5: crashed: WARNING in corrupted run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #8: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #9: crashed: WARNING in corrupted run #10: crashed: WARNING in process_one_work run #11: crashed: WARNING in process_one_work run #12: crashed: WARNING in corrupted run #13: crashed: WARNING in batadv_iv_send_outstanding_bat_ogm_packet run #14: crashed: WARNING in corrupted run #15: crashed: WARNING in corrupted run #16: crashed: WARNING in process_one_work run #17: OK run #18: OK run #19: OK testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6 testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4e5042357d801a90087fa6a170c510508adb540885abbffae0da207a2c25d7b1 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m10.807149961s (build: 15m45.274342281s, test: 14m42.671833904s) the crash still happens on HEAD commit msg: Linux 4.14.256 crash: unregister_netdevice: waiting for DEV to become free 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: hci4 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 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: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 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