bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on b74c49a6af84e6ab50018024e8862263b1e0bd6d testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 76fe5e73d72330c30d0260cfc19f1fe351e3e22826b135e7d2a33c1219467325 run #0: crashed: WARNING in sta_info_insert_rcu run #1: crashed: WARNING in sta_info_insert_rcu run #2: crashed: WARNING in corrupted 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 sta_info_insert_rcu 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 964f3712e6a7447d9d3203f2be3f6c50e78ea179 testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1b47e5a8ba8648a6e30520eee634fc1ce1c7f06d7319ba2cdd5ae122d4ae5a15 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m38.030654933s (build: 16m35.10551571s, test: 6m31.395161028s) the crash still happens on HEAD commit msg: Linux 4.14.240 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout