bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on b74c49a6af84e6ab50018024e8862263b1e0bd6d testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: df281aee245391f006f8133da199c8ddbcc7c8c894702c27fbb1e866b8c23b28 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 corrupted 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 2760370b164918bd9311e6bf445cf4c118d3463c testing commit 2760370b164918bd9311e6bf445cf4c118d3463c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 835c6b2b85118df2b08fb1c3fcce9ffc26488bff97fed24bd19e91cbaee89f4e all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 24m48.49426865s (build: 17m44.900123952s, test: 6m39.671439674s) the crash still happens on HEAD commit msg: Linux 4.14.252 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout