bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on b74c49a6af84e6ab50018024e8862263b1e0bd6d testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b23d5bd1804e8ac798bf9f1746eb9fb989e908d3ef126fafcd278c205974b61c run #0: crashed: WARNING in sta_info_insert_rcu run #1: crashed: WARNING in sta_info_insert_rcu run #2: crashed: WARNING in sta_info_insert_rcu run #3: crashed: WARNING in sta_info_insert_rcu run #4: crashed: WARNING in sta_info_insert_rcu run #5: crashed: WARNING in sta_info_insert_rcu run #6: crashed: WARNING in sta_info_insert_rcu run #7: crashed: WARNING in sta_info_insert_rcu run #8: crashed: WARNING in sta_info_insert_rcu run #9: crashed: WARNING in sta_info_insert_rcu run #10: crashed: WARNING in sta_info_insert_rcu run #11: crashed: WARNING in sta_info_insert_rcu run #12: crashed: WARNING in sta_info_insert_rcu run #13: crashed: WARNING in sta_info_insert_rcu run #14: crashed: WARNING in corrupted run #15: crashed: WARNING in sta_info_insert_rcu run #16: crashed: WARNING in sta_info_insert_rcu run #17: crashed: WARNING in sta_info_insert_rcu run #18: crashed: WARNING in sta_info_insert_rcu run #19: crashed: WARNING in sta_info_insert_rcu testing current HEAD a35d65bedfbc38cffe2701798cd6810bbdf07892 testing commit a35d65bedfbc38cffe2701798cd6810bbdf07892 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: d3d6ecb2feff9d5e7604fb0137d84ebf613938d46f61c1f77c64fc0a707a501a all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m40.465130055s (build: 25m45.119035874s, test: 6m9.603623715s) the crash still happens on HEAD commit msg: Linux 4.14.267 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: hci0 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 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