bisecting fixing commit since bd634aa6416382439890b78f7be0023020a86207 building syzkaller on 6a81331a1d4c744da9204d02ec88d558f7eea9c9 testing commit bd634aa6416382439890b78f7be0023020a86207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9694bfa902e48082075e5bb386d76580c6cc84886b31c86b5a58a9aef173b7f4 run #0: failed: failed to run binary in VM: broken console: Permission denied (publickey) run #1: crashed: WARNING: locking bug in __sb_end_write run #2: crashed: WARNING: locking bug in __sb_end_write run #3: crashed: WARNING: locking bug in __sb_end_write run #4: crashed: WARNING: locking bug in __sb_end_write run #5: crashed: WARNING: locking bug in __sb_end_write run #6: crashed: WARNING: locking bug in __sb_end_write run #7: crashed: WARNING: locking bug in __sb_end_write run #8: crashed: WARNING: locking bug in __sb_end_write run #9: crashed: WARNING: locking bug in __sb_end_write run #10: crashed: WARNING: locking bug in __sb_end_write run #11: crashed: WARNING: locking bug in __sb_end_write run #12: crashed: WARNING: locking bug in __sb_end_write run #13: crashed: WARNING: locking bug in __sb_end_write run #14: crashed: WARNING: locking bug in __sb_end_write run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6 testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6ffa40c124d58b534ab9a3bd6f02479b2d883153ec148152ea99e00995bc3cc9 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m53.641066477s (build: 20m10.657738524s, test: 12m6.346147649s) the crash still happens on HEAD commit msg: Linux 4.14.256 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: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 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: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout