bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 7e2b734bac96c22086fedd1b18135da06d5e4054 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: be9bb712047e6c6203bcd19ed3357732ac3c3ffce70bb7746fe0191cda279800 run #0: crashed: SYZFAIL: failed to mkdtemp run #1: crashed: SYZFAIL: failed to mkdtemp run #2: crashed: SYZFAIL: failed to mkdtemp run #3: OK run #4: OK run #5: crashed: SYZFAIL: failed to mkdtemp run #6: OK run #7: OK run #8: OK run #9: OK run #10: crashed: SYZFAIL: failed to mkdir run #11: OK run #12: crashed: SYZFAIL: failed to mkdir run #13: crashed: SYZFAIL: failed to mkdir run #14: crashed: SYZFAIL: failed to mkdtemp run #15: crashed: SYZFAIL: failed to mkdir run #16: crashed: SYZFAIL: failed to mkdir run #17: crashed: SYZFAIL: failed to mkdir run #18: OK run #19: crashed: SYZFAIL: failed to mkdir testing current HEAD f051383ef03bde49ca992f297ec80757a702e774 testing commit f051383ef03bde49ca992f297ec80757a702e774 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7afce5cc5369705109a4481473e31168b7aabe9b0ff03b4a7024cf6b01568986 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 19m48.144810227s (build: 12m8.954194638s, test: 7m13.419232175s) the crash still happens on HEAD commit msg: Linux 4.14.285 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1