bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on f54a5c0916af7d798b204eb70c484f154d69e0a3 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: e3118f79fef26dcba23ae4ed49bbc973b886c0b438fc89138c507a6bc2ab1261 run #0: crashed: kernel BUG in llc_sap_action_send_xid_c run #1: crashed: kernel BUG in llc_sap_action_send_xid_c run #2: crashed: kernel BUG in llc_sap_action_send_xid_c run #3: crashed: kernel BUG in llc_sap_action_send_xid_c run #4: crashed: kernel BUG in corrupted run #5: crashed: kernel BUG in corrupted run #6: crashed: kernel BUG in llc_sap_action_send_xid_c run #7: crashed: kernel BUG in llc_sap_action_send_xid_c run #8: crashed: kernel BUG in corrupted run #9: crashed: kernel BUG in llc_sap_action_send_xid_c run #10: crashed: kernel BUG in llc_sap_action_send_xid_c run #11: crashed: kernel BUG in llc_sap_action_send_xid_c run #12: crashed: kernel BUG in llc_sap_action_send_xid_c run #13: crashed: kernel BUG in llc_sap_action_send_xid_c run #14: crashed: kernel BUG in llc_sap_action_send_xid_c run #15: crashed: kernel BUG in llc_sap_action_send_xid_c run #16: crashed: kernel BUG in llc_sap_action_send_xid_c run #17: crashed: kernel BUG in llc_sap_action_send_xid_c run #18: crashed: kernel BUG in llc_sap_action_send_xid_c run #19: crashed: kernel BUG in llc_sap_action_send_xid_c testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 96df337a1a6ffb655db09021d32d201918fd5b81041906a114abea41013a1c38 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 21m11.507866994s (build: 14m23.489180715s, test: 6m25.988659246s) 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: hci4 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout