bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 7e2b734bac96c22086fedd1b18135da06d5e4054 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 8326c52692302e86a536e61502619f0b947b654e69c13b1cefd4f96044c62a05 run #0: crashed: SYZFAIL: failed to mkdtemp run #1: OK run #2: OK run #3: OK run #4: OK run #5: crashed: SYZFAIL: failed to mkdtemp run #6: OK run #7: OK run #8: crashed: SYZFAIL: failed to mkdtemp run #9: crashed: SYZFAIL: failed to mkdir run #10: OK run #11: OK run #12: crashed: SYZFAIL: failed to mkdir run #13: OK run #14: OK run #15: crashed: SYZFAIL: failed to mkdir run #16: crashed: SYZFAIL: failed to mkdir run #17: crashed: SYZFAIL: failed to mkdir run #18: crashed: SYZFAIL: failed to mkdir run #19: crashed: SYZFAIL: failed to mkdir testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 74d63d392260344d44baac5cee14239b1bcee23961a371f8462fa88e8a9c29b1 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m1.217890236s (build: 17m37.739229547s, test: 6m57.267490013s) the crash still happens on HEAD commit msg: Linux 4.14.254 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout