bisecting fixing commit since 414510bc00a5fc954d8340c170083f518d09aa55 building syzkaller on a60cb4cd840ce786236a00480e8bb1025e0c5fef testing commit 414510bc00a5fc954d8340c170083f518d09aa55 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: ae6d2a6d37dc5452737ac676ae0b266afc32a95b97af2c66d094ff09e3c3b49c run #0: crashed: kernel BUG in rxrpc_disconnect_client_call run #1: crashed: general protection fault in rxrpc_get_skb run #2: crashed: general protection fault in rxrpc_get_skb run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in rxrpc_send_data_packet run #4: crashed: kernel BUG in rxrpc_destroy_all_locals run #5: crashed: kernel BUG in rxrpc_destroy_all_locals run #6: crashed: kernel BUG in rxrpc_destroy_all_locals run #7: crashed: kernel BUG in rxrpc_destroy_all_locals run #8: crashed: kernel BUG in rxrpc_destroy_all_locals run #9: crashed: kernel BUG in rxrpc_destroy_all_locals run #10: crashed: kernel BUG in rxrpc_destroy_all_locals run #11: crashed: kernel BUG in rxrpc_destroy_all_locals run #12: crashed: kernel BUG in rxrpc_destroy_all_locals run #13: crashed: kernel BUG in rxrpc_destroy_all_locals run #14: crashed: kernel BUG in rxrpc_destroy_all_locals run #15: crashed: kernel BUG in rxrpc_destroy_all_locals run #16: crashed: kernel BUG in rxrpc_destroy_all_locals run #17: crashed: kernel BUG in rxrpc_destroy_all_locals run #18: crashed: kernel BUG in rxrpc_destroy_all_locals run #19: crashed: kernel BUG in rxrpc_destroy_all_locals testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: cbff2584d090ce236572fb8e037289267feb0bb4660bd90bde38dd48fecac185 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 33m5.618977734s (build: 19m33.243953825s, test: 12m28.256209214s) the crash still happens on HEAD commit msg: Linux 4.14.254 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1