bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 122c42ea89fa313c7c04e3d00476016c2d234bdcd3856ec5a2e692f456b6a781 run #0: OK run #1: crashed: WARNING in bpf_prog_select_runtime run #2: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #3: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #4: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #5: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #6: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #7: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #8: OK run #9: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #10: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #11: OK run #12: crashed: WARNING: ODEBUG bug in batadv_nc_mesh_free run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 690285a9380d183e6d286d90e458fa7c3f97eca2 testing commit 690285a9380d183e6d286d90e458fa7c3f97eca2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 13bbb61f1164424830a5c086c8917d0681b5add8ef5b8714bd55fccd73bb8ffb all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 33m26.279112098s (build: 20m52.248600797s, test: 12m2.047659333s) the crash still happens on HEAD commit msg: Linux 4.14.279 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout